/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-a865e3bea3ade1065a4c95009cfa501fe03c5538-a865e3b [2021-02-19 17:45:27,550 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-19 17:45:27,552 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-19 17:45:27,582 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-19 17:45:27,633 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 [2021-02-19 17:45:27,662 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-19 17:45:27,662 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-19 17:45:27,662 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-02-19 17:45:27,662 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-02-19 17:45:27,665 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-19 17:45:27,665 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-19 17:45:27,665 INFO L138 SettingsManager]: * Use SBE=true [2021-02-19 17:45:27,666 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-19 17:45:27,666 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-19 17:45:27,666 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-19 17:45:27,666 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-19 17:45:27,666 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-19 17:45:27,667 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-19 17:45:27,667 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-19 17:45:27,667 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-19 17:45:27,667 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-19 17:45:27,667 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-19 17:45:27,667 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-19 17:45:27,667 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-19 17:45:27,667 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-19 17:45:27,667 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-19 17:45:27,667 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-19 17:45:27,668 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-19 17:45:27,668 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-19 17:45:27,668 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-19 17:45:27,668 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-19 17:45:27,668 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-19 17:45:27,668 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-19 17:45:27,668 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-19 17:45:27,668 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-02-19 17:45:27,668 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-19 17:45:27,668 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-19 17:45:27,925 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-19 17:45:27,946 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-19 17:45:27,948 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-19 17:45:27,949 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-02-19 17:45:27,950 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-02-19 17:45:27,950 INFO L432 ainManager$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 [2021-02-19 17:45:27,967 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/chromosome-symm.wvr.bpl' [2021-02-19 17:45:27,984 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-19 17:45:27,989 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-19 17:45:27,990 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-02-19 17:45:27,990 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-02-19 17:45:27,990 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-02-19 17:45:28,001 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 19.02 05:45:27" (1/1) ... [2021-02-19 17:45:28,008 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 19.02 05:45:27" (1/1) ... [2021-02-19 17:45:28,013 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-02-19 17:45:28,015 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-19 17:45:28,015 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-19 17:45:28,015 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-19 17:45:28,022 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "chromosome-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:45:27" (1/1) ... [2021-02-19 17:45:28,023 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "chromosome-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:45:27" (1/1) ... [2021-02-19 17:45:28,024 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "chromosome-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:45:27" (1/1) ... [2021-02-19 17:45:28,024 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "chromosome-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:45:27" (1/1) ... [2021-02-19 17:45:28,027 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "chromosome-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:45:27" (1/1) ... [2021-02-19 17:45:28,030 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "chromosome-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:45:27" (1/1) ... [2021-02-19 17:45:28,031 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "chromosome-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:45:27" (1/1) ... [2021-02-19 17:45:28,034 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-19 17:45:28,035 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-19 17:45:28,035 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-19 17:45:28,035 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-19 17:45:28,037 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "chromosome-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:45:27" (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 [2021-02-19 17:45:28,086 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-02-19 17:45:28,086 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-02-19 17:45:28,086 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-02-19 17:45:28,087 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-02-19 17:45:28,087 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-02-19 17:45:28,087 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-02-19 17:45:28,087 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-02-19 17:45:28,087 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-19 17:45:28,087 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-19 17:45:28,087 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-02-19 17:45:28,353 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-19 17:45:28,353 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-02-19 17:45:28,354 INFO L202 PluginConnector]: Adding new model chromosome-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 05:45:28 BoogieIcfgContainer [2021-02-19 17:45:28,354 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-19 17:45:28,355 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-19 17:45:28,355 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-19 17:45:28,357 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-19 17:45:28,357 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "chromosome-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:45:27" (1/2) ... [2021-02-19 17:45:28,358 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60504116 and model type chromosome-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 05:45:28, skipping insertion in model container [2021-02-19 17:45:28,358 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "chromosome-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 05:45:28" (2/2) ... [2021-02-19 17:45:28,359 INFO L111 eAbstractionObserver]: Analyzing ICFG chromosome-symm.wvr.bpl [2021-02-19 17:45:28,371 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-02-19 17:45:28,371 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-19 17:45:28,374 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-19 17:45:28,375 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-02-19 17:45:28,415 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-02-19 17:45:28,426 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-02-19 17:45:28,445 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-19 17:45:28,445 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-19 17:45:28,446 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-19 17:45:28,446 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-19 17:45:28,446 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-19 17:45:28,446 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-19 17:45:28,446 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-19 17:45:28,446 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-19 17:45:28,456 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 23 places, 18 transitions, 52 flow [2021-02-19 17:45:28,464 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) [2021-02-19 17:45:28,466 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) [2021-02-19 17:45:28,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-02-19 17:45:28,470 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:28,470 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:28,470 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:28,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:28,475 INFO L82 PathProgramCache]: Analyzing trace with hash -2065408742, now seen corresponding path program 1 times [2021-02-19 17:45:28,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:28,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144594983] [2021-02-19 17:45:28,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:28,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:28,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:28,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144594983] [2021-02-19 17:45:28,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:45:28,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:45:28,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066205766] [2021-02-19 17:45:28,625 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:45:28,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:45:28,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:45:28,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:45:28,636 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) [2021-02-19 17:45:28,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:45:28,663 INFO L93 Difference]: Finished difference Result 50 states and 90 transitions. [2021-02-19 17:45:28,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:45:28,665 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 [2021-02-19 17:45:28,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:45:28,671 INFO L225 Difference]: With dead ends: 50 [2021-02-19 17:45:28,671 INFO L226 Difference]: Without dead ends: 45 [2021-02-19 17:45:28,672 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:45:28,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-02-19 17:45:28,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2021-02-19 17:45:28,698 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) [2021-02-19 17:45:28,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 56 transitions. [2021-02-19 17:45:28,700 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 56 transitions. Word has length 12 [2021-02-19 17:45:28,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:45:28,700 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 56 transitions. [2021-02-19 17:45:28,700 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) [2021-02-19 17:45:28,700 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 56 transitions. [2021-02-19 17:45:28,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-02-19 17:45:28,701 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:28,701 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:28,701 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-19 17:45:28,701 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:28,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:28,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1998241260, now seen corresponding path program 2 times [2021-02-19 17:45:28,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:28,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139655600] [2021-02-19 17:45:28,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:28,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:28,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:28,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139655600] [2021-02-19 17:45:28,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:45:28,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:45:28,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703691294] [2021-02-19 17:45:28,763 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:45:28,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:45:28,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:45:28,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:45:28,764 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) [2021-02-19 17:45:28,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:45:28,782 INFO L93 Difference]: Finished difference Result 48 states and 89 transitions. [2021-02-19 17:45:28,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:45:28,782 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 [2021-02-19 17:45:28,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:45:28,784 INFO L225 Difference]: With dead ends: 48 [2021-02-19 17:45:28,784 INFO L226 Difference]: Without dead ends: 48 [2021-02-19 17:45:28,784 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:45:28,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-02-19 17:45:28,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 33. [2021-02-19 17:45:28,794 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) [2021-02-19 17:45:28,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 62 transitions. [2021-02-19 17:45:28,795 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 62 transitions. Word has length 12 [2021-02-19 17:45:28,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:45:28,795 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 62 transitions. [2021-02-19 17:45:28,795 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) [2021-02-19 17:45:28,795 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 62 transitions. [2021-02-19 17:45:28,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-02-19 17:45:28,796 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:28,796 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:28,796 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-19 17:45:28,796 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:28,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:28,796 INFO L82 PathProgramCache]: Analyzing trace with hash -147929500, now seen corresponding path program 3 times [2021-02-19 17:45:28,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:28,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072482512] [2021-02-19 17:45:28,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:28,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:28,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:28,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072482512] [2021-02-19 17:45:28,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:45:28,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:45:28,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547651810] [2021-02-19 17:45:28,815 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:45:28,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:45:28,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:45:28,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:45:28,815 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) [2021-02-19 17:45:28,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:45:28,835 INFO L93 Difference]: Finished difference Result 36 states and 68 transitions. [2021-02-19 17:45:28,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:45:28,835 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 [2021-02-19 17:45:28,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:45:28,836 INFO L225 Difference]: With dead ends: 36 [2021-02-19 17:45:28,837 INFO L226 Difference]: Without dead ends: 36 [2021-02-19 17:45:28,837 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:45:28,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-02-19 17:45:28,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2021-02-19 17:45:28,844 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) [2021-02-19 17:45:28,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 62 transitions. [2021-02-19 17:45:28,846 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 62 transitions. Word has length 12 [2021-02-19 17:45:28,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:45:28,847 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 62 transitions. [2021-02-19 17:45:28,849 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) [2021-02-19 17:45:28,849 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 62 transitions. [2021-02-19 17:45:28,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-02-19 17:45:28,852 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:28,852 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:28,852 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-19 17:45:28,852 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:28,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:28,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1920123749, now seen corresponding path program 1 times [2021-02-19 17:45:28,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:28,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517911252] [2021-02-19 17:45:28,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:28,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:28,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:45:28,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517911252] [2021-02-19 17:45:28,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:45:28,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:45:28,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006884557] [2021-02-19 17:45:28,878 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:45:28,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:45:28,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:45:28,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:45:28,879 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) [2021-02-19 17:45:28,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:45:28,897 INFO L93 Difference]: Finished difference Result 38 states and 72 transitions. [2021-02-19 17:45:28,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:45:28,897 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 [2021-02-19 17:45:28,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:45:28,898 INFO L225 Difference]: With dead ends: 38 [2021-02-19 17:45:28,898 INFO L226 Difference]: Without dead ends: 38 [2021-02-19 17:45:28,898 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:45:28,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-02-19 17:45:28,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-02-19 17:45:28,900 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) [2021-02-19 17:45:28,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 72 transitions. [2021-02-19 17:45:28,901 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 72 transitions. Word has length 13 [2021-02-19 17:45:28,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:45:28,901 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 72 transitions. [2021-02-19 17:45:28,901 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) [2021-02-19 17:45:28,901 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 72 transitions. [2021-02-19 17:45:28,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-02-19 17:45:28,902 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:28,902 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:28,902 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-19 17:45:28,902 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:28,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:28,902 INFO L82 PathProgramCache]: Analyzing trace with hash 574597711, now seen corresponding path program 2 times [2021-02-19 17:45:28,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:28,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973758459] [2021-02-19 17:45:28,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:28,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:28,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:45:28,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973758459] [2021-02-19 17:45:28,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:45:28,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:45:28,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089461612] [2021-02-19 17:45:28,932 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:45:28,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:45:28,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:45:28,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:45:28,933 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) [2021-02-19 17:45:28,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:45:28,943 INFO L93 Difference]: Finished difference Result 59 states and 106 transitions. [2021-02-19 17:45:28,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:45:28,943 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 [2021-02-19 17:45:28,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:45:28,944 INFO L225 Difference]: With dead ends: 59 [2021-02-19 17:45:28,944 INFO L226 Difference]: Without dead ends: 59 [2021-02-19 17:45:28,944 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:45:28,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-02-19 17:45:28,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 39. [2021-02-19 17:45:28,946 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) [2021-02-19 17:45:28,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 75 transitions. [2021-02-19 17:45:28,947 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 75 transitions. Word has length 13 [2021-02-19 17:45:28,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:45:28,947 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 75 transitions. [2021-02-19 17:45:28,947 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) [2021-02-19 17:45:28,947 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 75 transitions. [2021-02-19 17:45:28,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-02-19 17:45:28,947 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:28,948 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:28,948 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-19 17:45:28,948 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:28,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:28,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1482027079, now seen corresponding path program 3 times [2021-02-19 17:45:28,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:28,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053829010] [2021-02-19 17:45:28,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:28,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:28,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:45:28,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053829010] [2021-02-19 17:45:28,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:45:28,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:45:28,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176222268] [2021-02-19 17:45:28,967 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:45:28,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:45:28,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:45:28,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:45:28,968 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) [2021-02-19 17:45:28,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:45:28,979 INFO L93 Difference]: Finished difference Result 41 states and 76 transitions. [2021-02-19 17:45:28,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:45:28,979 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 [2021-02-19 17:45:28,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:45:28,980 INFO L225 Difference]: With dead ends: 41 [2021-02-19 17:45:28,980 INFO L226 Difference]: Without dead ends: 39 [2021-02-19 17:45:28,980 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:45:28,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-02-19 17:45:28,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-02-19 17:45:28,983 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) [2021-02-19 17:45:28,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 74 transitions. [2021-02-19 17:45:28,983 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 74 transitions. Word has length 13 [2021-02-19 17:45:28,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:45:28,983 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 74 transitions. [2021-02-19 17:45:28,983 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) [2021-02-19 17:45:28,983 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 74 transitions. [2021-02-19 17:45:28,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-02-19 17:45:28,984 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:28,984 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:28,984 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-19 17:45:28,984 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:28,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:28,984 INFO L82 PathProgramCache]: Analyzing trace with hash 632330343, now seen corresponding path program 1 times [2021-02-19 17:45:28,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:28,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281362798] [2021-02-19 17:45:28,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:29,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:29,197 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:29,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281362798] [2021-02-19 17:45:29,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104383974] [2021-02-19 17:45:29,198 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 [2021-02-19 17:45:29,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:29,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 19 conjunts are in the unsatisfiable core [2021-02-19 17:45:29,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:45:29,395 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 [2021-02-19 17:45:29,398 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:29,401 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 [2021-02-19 17:45:29,403 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:29,405 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 38 treesize of output 30 [2021-02-19 17:45:29,407 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:29,410 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 38 treesize of output 30 [2021-02-19 17:45:29,412 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:29,447 INFO L628 ElimStorePlain]: treesize reduction 74, result has 20.4 percent of original size [2021-02-19 17:45:29,447 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:45:29,448 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:45:29,449 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:171, output treesize:19 [2021-02-19 17:45:29,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:29,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:45:29,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-02-19 17:45:29,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799990565] [2021-02-19 17:45:29,513 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:45:29,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:45:29,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:45:29,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:45:29,513 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) [2021-02-19 17:45:29,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:45:29,674 INFO L93 Difference]: Finished difference Result 78 states and 141 transitions. [2021-02-19 17:45:29,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 17:45:29,674 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 [2021-02-19 17:45:29,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:45:29,674 INFO L225 Difference]: With dead ends: 78 [2021-02-19 17:45:29,675 INFO L226 Difference]: Without dead ends: 60 [2021-02-19 17:45:29,675 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:45:29,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-02-19 17:45:29,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 41. [2021-02-19 17:45:29,677 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) [2021-02-19 17:45:29,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 78 transitions. [2021-02-19 17:45:29,677 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 78 transitions. Word has length 14 [2021-02-19 17:45:29,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:45:29,677 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 78 transitions. [2021-02-19 17:45:29,677 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) [2021-02-19 17:45:29,678 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 78 transitions. [2021-02-19 17:45:29,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-02-19 17:45:29,678 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:29,678 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:29,894 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-02-19 17:45:29,894 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:29,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:29,894 INFO L82 PathProgramCache]: Analyzing trace with hash 2051428821, now seen corresponding path program 2 times [2021-02-19 17:45:29,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:29,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069976139] [2021-02-19 17:45:29,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:29,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:30,129 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:30,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069976139] [2021-02-19 17:45:30,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990838490] [2021-02-19 17:45:30,130 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) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:45:30,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:45:30,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:45:30,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 19 conjunts are in the unsatisfiable core [2021-02-19 17:45:30,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:45:30,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:30,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:30,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:45:30,362 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:30,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:30,364 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 19 treesize of output 15 [2021-02-19 17:45:30,365 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:30,384 INFO L628 ElimStorePlain]: treesize reduction 34, result has 45.2 percent of original size [2021-02-19 17:45:30,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:30,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:45:30,389 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:45:30,395 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:30,396 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:45:30,397 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-02-19 17:45:30,435 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:30,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:45:30,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-02-19 17:45:30,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654324826] [2021-02-19 17:45:30,436 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:45:30,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:45:30,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:45:30,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:45:30,436 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) [2021-02-19 17:45:30,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:45:30,572 INFO L93 Difference]: Finished difference Result 74 states and 134 transitions. [2021-02-19 17:45:30,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 17:45:30,572 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 [2021-02-19 17:45:30,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:45:30,573 INFO L225 Difference]: With dead ends: 74 [2021-02-19 17:45:30,573 INFO L226 Difference]: Without dead ends: 61 [2021-02-19 17:45:30,573 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:45:30,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-02-19 17:45:30,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 42. [2021-02-19 17:45:30,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.951219512195122) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:30,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 80 transitions. [2021-02-19 17:45:30,575 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 80 transitions. Word has length 14 [2021-02-19 17:45:30,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:45:30,575 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 80 transitions. [2021-02-19 17:45:30,575 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) [2021-02-19 17:45:30,575 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 80 transitions. [2021-02-19 17:45:30,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-02-19 17:45:30,576 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:30,576 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:30,782 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:45:30,782 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:30,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:30,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1852055701, now seen corresponding path program 3 times [2021-02-19 17:45:30,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:30,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144273007] [2021-02-19 17:45:30,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:30,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:30,987 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:30,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144273007] [2021-02-19 17:45:30,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959292624] [2021-02-19 17:45:30,988 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 [2021-02-19 17:45:31,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 17:45:31,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:45:31,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 19 conjunts are in the unsatisfiable core [2021-02-19 17:45:31,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:45:31,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:31,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:31,173 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 [2021-02-19 17:45:31,175 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:31,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:31,180 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 19 treesize of output 15 [2021-02-19 17:45:31,181 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:31,246 INFO L628 ElimStorePlain]: treesize reduction 88, result has 45.0 percent of original size [2021-02-19 17:45:31,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:31,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:45:31,255 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:45:31,281 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:31,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:31,286 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 [2021-02-19 17:45:31,287 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:31,311 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:31,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:31,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:45:31,317 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:45:31,337 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:31,339 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:45:31,340 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-02-19 17:45:31,414 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:31,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:45:31,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-02-19 17:45:31,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831146574] [2021-02-19 17:45:31,415 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:45:31,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:45:31,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:45:31,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:45:31,416 INFO L87 Difference]: Start difference. First operand 42 states and 80 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) [2021-02-19 17:45:31,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:45:31,729 INFO L93 Difference]: Finished difference Result 96 states and 170 transitions. [2021-02-19 17:45:31,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:45:31,729 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 [2021-02-19 17:45:31,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:45:31,730 INFO L225 Difference]: With dead ends: 96 [2021-02-19 17:45:31,730 INFO L226 Difference]: Without dead ends: 77 [2021-02-19 17:45:31,730 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:45:31,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-02-19 17:45:31,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 44. [2021-02-19 17:45:31,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 2.0) internal successors, (86), 43 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:31,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 86 transitions. [2021-02-19 17:45:31,732 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 86 transitions. Word has length 14 [2021-02-19 17:45:31,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:45:31,732 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 86 transitions. [2021-02-19 17:45:31,732 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) [2021-02-19 17:45:31,733 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 86 transitions. [2021-02-19 17:45:31,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-02-19 17:45:31,733 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:31,733 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:31,938 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-02-19 17:45:31,938 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:31,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:31,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1545082555, now seen corresponding path program 4 times [2021-02-19 17:45:31,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:31,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235387455] [2021-02-19 17:45:31,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:31,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:32,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:32,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235387455] [2021-02-19 17:45:32,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845819495] [2021-02-19 17:45:32,115 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 [2021-02-19 17:45:32,145 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:45:32,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:45:32,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 19 conjunts are in the unsatisfiable core [2021-02-19 17:45:32,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:45:32,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:32,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:32,286 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 27 treesize of output 21 [2021-02-19 17:45:32,288 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:32,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:32,290 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 27 treesize of output 21 [2021-02-19 17:45:32,294 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:32,314 INFO L628 ElimStorePlain]: treesize reduction 40, result has 38.5 percent of original size [2021-02-19 17:45:32,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:32,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:45:32,319 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:45:32,324 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:32,326 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:45:32,326 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-02-19 17:45:32,365 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:32,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:45:32,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-02-19 17:45:32,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689301284] [2021-02-19 17:45:32,366 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:45:32,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:45:32,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:45:32,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:45:32,366 INFO L87 Difference]: Start difference. First operand 44 states and 86 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) [2021-02-19 17:45:32,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:45:32,453 INFO L93 Difference]: Finished difference Result 59 states and 109 transitions. [2021-02-19 17:45:32,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 17:45:32,454 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 [2021-02-19 17:45:32,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:45:32,455 INFO L225 Difference]: With dead ends: 59 [2021-02-19 17:45:32,455 INFO L226 Difference]: Without dead ends: 46 [2021-02-19 17:45:32,455 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:45:32,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-02-19 17:45:32,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-02-19 17:45:32,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.0) internal successors, (90), 45 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:32,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 90 transitions. [2021-02-19 17:45:32,468 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 90 transitions. Word has length 14 [2021-02-19 17:45:32,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:45:32,468 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 90 transitions. [2021-02-19 17:45:32,468 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) [2021-02-19 17:45:32,468 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 90 transitions. [2021-02-19 17:45:32,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-02-19 17:45:32,470 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:32,470 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:32,670 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:45:32,671 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:32,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:32,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1936565329, now seen corresponding path program 5 times [2021-02-19 17:45:32,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:32,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530609807] [2021-02-19 17:45:32,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:32,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:32,841 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:32,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530609807] [2021-02-19 17:45:32,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701414030] [2021-02-19 17:45:32,841 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) [2021-02-19 17:45:32,870 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:45:32,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:45:32,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 19 conjunts are in the unsatisfiable core [2021-02-19 17:45:32,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:45:32,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:32,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:32,973 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 19 treesize of output 15 [2021-02-19 17:45:32,974 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:32,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:32,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:45:32,979 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:33,047 INFO L628 ElimStorePlain]: treesize reduction 85, result has 46.9 percent of original size [2021-02-19 17:45:33,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:33,050 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 13 treesize of output 9 [2021-02-19 17:45:33,052 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:45:33,076 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:33,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:33,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:45:33,082 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:33,104 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:33,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:33,107 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 10 treesize of output 6 [2021-02-19 17:45:33,109 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:45:33,129 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:33,131 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:45:33,132 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-02-19 17:45:33,202 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:33,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:45:33,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-02-19 17:45:33,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831758751] [2021-02-19 17:45:33,204 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:45:33,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:45:33,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:45:33,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:45:33,205 INFO L87 Difference]: Start difference. First operand 46 states and 90 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) [2021-02-19 17:45:33,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:45:33,407 INFO L93 Difference]: Finished difference Result 81 states and 145 transitions. [2021-02-19 17:45:33,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:45:33,407 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 [2021-02-19 17:45:33,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:45:33,408 INFO L225 Difference]: With dead ends: 81 [2021-02-19 17:45:33,408 INFO L226 Difference]: Without dead ends: 62 [2021-02-19 17:45:33,408 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:45:33,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-02-19 17:45:33,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 45. [2021-02-19 17:45:33,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 2.0) internal successors, (88), 44 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:33,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 88 transitions. [2021-02-19 17:45:33,410 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 88 transitions. Word has length 14 [2021-02-19 17:45:33,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:45:33,410 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 88 transitions. [2021-02-19 17:45:33,410 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) [2021-02-19 17:45:33,410 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 88 transitions. [2021-02-19 17:45:33,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-02-19 17:45:33,410 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:33,411 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:33,611 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-02-19 17:45:33,611 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:33,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:33,612 INFO L82 PathProgramCache]: Analyzing trace with hash 1401335527, now seen corresponding path program 6 times [2021-02-19 17:45:33,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:33,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175558863] [2021-02-19 17:45:33,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:33,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:33,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:33,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175558863] [2021-02-19 17:45:33,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286604007] [2021-02-19 17:45:33,770 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 [2021-02-19 17:45:33,789 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:45:33,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:45:33,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 19 conjunts are in the unsatisfiable core [2021-02-19 17:45:33,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:45:33,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:33,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:33,843 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 19 treesize of output 15 [2021-02-19 17:45:33,844 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:33,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:33,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:33,847 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 [2021-02-19 17:45:33,848 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:33,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:33,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:33,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:45:33,853 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:33,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:33,856 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 19 treesize of output 15 [2021-02-19 17:45:33,857 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:33,907 INFO L628 ElimStorePlain]: treesize reduction 77, result has 45.4 percent of original size [2021-02-19 17:45:33,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:33,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:33,911 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 10 treesize of output 6 [2021-02-19 17:45:33,913 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:45:33,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:33,916 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 10 treesize of output 6 [2021-02-19 17:45:33,917 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:45:33,939 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:33,943 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:45:33,943 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-02-19 17:45:34,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:34,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:45:34,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-02-19 17:45:34,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816947775] [2021-02-19 17:45:34,024 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:45:34,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:45:34,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:45:34,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:45:34,025 INFO L87 Difference]: Start difference. First operand 45 states and 88 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) [2021-02-19 17:45:34,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:45:34,280 INFO L93 Difference]: Finished difference Result 90 states and 168 transitions. [2021-02-19 17:45:34,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:45:34,281 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 [2021-02-19 17:45:34,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:45:34,281 INFO L225 Difference]: With dead ends: 90 [2021-02-19 17:45:34,281 INFO L226 Difference]: Without dead ends: 71 [2021-02-19 17:45:34,282 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:45:34,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-02-19 17:45:34,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 49. [2021-02-19 17:45:34,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 2.0) internal successors, (96), 48 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:34,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 96 transitions. [2021-02-19 17:45:34,284 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 96 transitions. Word has length 14 [2021-02-19 17:45:34,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:45:34,284 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 96 transitions. [2021-02-19 17:45:34,284 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) [2021-02-19 17:45:34,284 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 96 transitions. [2021-02-19 17:45:34,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-02-19 17:45:34,284 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:34,284 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:34,484 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:45:34,485 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:34,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:34,485 INFO L82 PathProgramCache]: Analyzing trace with hash 659284275, now seen corresponding path program 7 times [2021-02-19 17:45:34,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:34,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597966270] [2021-02-19 17:45:34,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:34,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:34,641 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:34,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597966270] [2021-02-19 17:45:34,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604478765] [2021-02-19 17:45:34,642 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 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 [2021-02-19 17:45:34,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:34,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 19 conjunts are in the unsatisfiable core [2021-02-19 17:45:34,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:45:34,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:34,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:34,730 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 27 treesize of output 21 [2021-02-19 17:45:34,731 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:34,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:34,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:45:34,735 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:34,755 INFO L628 ElimStorePlain]: treesize reduction 48, result has 36.0 percent of original size [2021-02-19 17:45:34,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:34,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:45:34,763 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:45:34,769 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:34,770 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:45:34,770 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-02-19 17:45:34,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:34,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:45:34,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-02-19 17:45:34,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638653990] [2021-02-19 17:45:34,801 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:45:34,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:45:34,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:45:34,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:45:34,801 INFO L87 Difference]: Start difference. First operand 49 states and 96 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) [2021-02-19 17:45:34,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:45:34,889 INFO L93 Difference]: Finished difference Result 66 states and 122 transitions. [2021-02-19 17:45:34,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 17:45:34,890 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 [2021-02-19 17:45:34,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:45:34,890 INFO L225 Difference]: With dead ends: 66 [2021-02-19 17:45:34,890 INFO L226 Difference]: Without dead ends: 53 [2021-02-19 17:45:34,891 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:45:34,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-02-19 17:45:34,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50. [2021-02-19 17:45:34,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 2.0) internal successors, (98), 49 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:34,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 98 transitions. [2021-02-19 17:45:34,895 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 98 transitions. Word has length 14 [2021-02-19 17:45:34,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:45:34,895 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 98 transitions. [2021-02-19 17:45:34,895 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) [2021-02-19 17:45:34,895 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 98 transitions. [2021-02-19 17:45:34,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-02-19 17:45:34,895 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:34,895 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:35,102 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-02-19 17:45:35,102 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:35,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:35,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1050767049, now seen corresponding path program 8 times [2021-02-19 17:45:35,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:35,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076177308] [2021-02-19 17:45:35,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:35,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:35,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:35,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076177308] [2021-02-19 17:45:35,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000663885] [2021-02-19 17:45:35,217 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 [2021-02-19 17:45:35,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:45:35,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:45:35,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 19 conjunts are in the unsatisfiable core [2021-02-19 17:45:35,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:45:35,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:35,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:35,307 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 19 treesize of output 15 [2021-02-19 17:45:35,311 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:35,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:35,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:35,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:45:35,317 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:35,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:35,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:35,321 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 19 treesize of output 15 [2021-02-19 17:45:35,321 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:35,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:35,324 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 19 treesize of output 15 [2021-02-19 17:45:35,325 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:35,377 INFO L628 ElimStorePlain]: treesize reduction 80, result has 45.6 percent of original size [2021-02-19 17:45:35,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:35,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:35,380 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 10 treesize of output 6 [2021-02-19 17:45:35,382 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:45:35,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:35,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:45:35,387 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:45:35,412 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:35,413 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:45:35,413 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-02-19 17:45:35,501 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:35,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:45:35,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-02-19 17:45:35,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280738819] [2021-02-19 17:45:35,502 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:45:35,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:45:35,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:45:35,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:45:35,503 INFO L87 Difference]: Start difference. First operand 50 states and 98 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) [2021-02-19 17:45:35,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:45:35,603 INFO L93 Difference]: Finished difference Result 66 states and 123 transitions. [2021-02-19 17:45:35,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 17:45:35,604 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 [2021-02-19 17:45:35,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:45:35,604 INFO L225 Difference]: With dead ends: 66 [2021-02-19 17:45:35,604 INFO L226 Difference]: Without dead ends: 54 [2021-02-19 17:45:35,605 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:45:35,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-02-19 17:45:35,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2021-02-19 17:45:35,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 2.0) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:35,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 100 transitions. [2021-02-19 17:45:35,606 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 100 transitions. Word has length 14 [2021-02-19 17:45:35,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:45:35,606 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 100 transitions. [2021-02-19 17:45:35,606 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) [2021-02-19 17:45:35,606 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 100 transitions. [2021-02-19 17:45:35,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-02-19 17:45:35,607 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:35,607 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:35,807 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:45:35,807 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:35,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:35,808 INFO L82 PathProgramCache]: Analyzing trace with hash 515537247, now seen corresponding path program 9 times [2021-02-19 17:45:35,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:35,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134962231] [2021-02-19 17:45:35,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:35,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:35,964 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:35,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134962231] [2021-02-19 17:45:35,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237877804] [2021-02-19 17:45:35,964 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 [2021-02-19 17:45:35,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:45:35,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:45:35,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 19 conjunts are in the unsatisfiable core [2021-02-19 17:45:35,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:45:36,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:36,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:36,090 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 19 treesize of output 15 [2021-02-19 17:45:36,091 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:36,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:36,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:45:36,095 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:36,155 INFO L628 ElimStorePlain]: treesize reduction 88, result has 46.0 percent of original size [2021-02-19 17:45:36,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:36,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:45:36,159 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:36,180 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:36,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:36,184 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 10 treesize of output 6 [2021-02-19 17:45:36,186 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:45:36,212 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:36,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:36,216 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 13 treesize of output 9 [2021-02-19 17:45:36,218 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:45:36,236 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:36,239 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:45:36,240 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-02-19 17:45:36,328 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:36,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:45:36,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-02-19 17:45:36,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876577355] [2021-02-19 17:45:36,329 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:45:36,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:45:36,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:45:36,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:45:36,330 INFO L87 Difference]: Start difference. First operand 51 states and 100 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) [2021-02-19 17:45:36,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:45:36,563 INFO L93 Difference]: Finished difference Result 99 states and 185 transitions. [2021-02-19 17:45:36,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:45:36,563 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 [2021-02-19 17:45:36,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:45:36,563 INFO L225 Difference]: With dead ends: 99 [2021-02-19 17:45:36,563 INFO L226 Difference]: Without dead ends: 80 [2021-02-19 17:45:36,564 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:45:36,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-02-19 17:45:36,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 51. [2021-02-19 17:45:36,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 2.0) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:36,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 100 transitions. [2021-02-19 17:45:36,565 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 100 transitions. Word has length 14 [2021-02-19 17:45:36,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:45:36,565 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 100 transitions. [2021-02-19 17:45:36,565 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) [2021-02-19 17:45:36,565 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 100 transitions. [2021-02-19 17:45:36,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-02-19 17:45:36,566 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:36,566 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:36,766 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:45:36,766 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:36,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:36,767 INFO L82 PathProgramCache]: Analyzing trace with hash -497155285, now seen corresponding path program 10 times [2021-02-19 17:45:36,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:36,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931604515] [2021-02-19 17:45:36,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:36,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:36,942 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:36,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931604515] [2021-02-19 17:45:36,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284000912] [2021-02-19 17:45:36,943 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 [2021-02-19 17:45:36,959 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:45:36,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:45:36,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 19 conjunts are in the unsatisfiable core [2021-02-19 17:45:36,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:45:37,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:37,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:37,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:45:37,079 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:37,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:37,083 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 19 treesize of output 15 [2021-02-19 17:45:37,083 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:37,142 INFO L628 ElimStorePlain]: treesize reduction 85, result has 46.9 percent of original size [2021-02-19 17:45:37,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:37,145 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 [2021-02-19 17:45:37,147 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:45:37,177 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:37,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:37,180 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 [2021-02-19 17:45:37,182 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:37,202 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:37,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:37,209 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 [2021-02-19 17:45:37,210 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:45:37,230 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:37,238 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:45:37,238 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-02-19 17:45:37,310 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:37,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:45:37,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-02-19 17:45:37,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442449523] [2021-02-19 17:45:37,310 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:45:37,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:45:37,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:45:37,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:45:37,311 INFO L87 Difference]: Start difference. First operand 51 states and 100 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) [2021-02-19 17:45:37,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:45:37,735 INFO L93 Difference]: Finished difference Result 123 states and 230 transitions. [2021-02-19 17:45:37,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:45:37,735 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 [2021-02-19 17:45:37,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:45:37,735 INFO L225 Difference]: With dead ends: 123 [2021-02-19 17:45:37,735 INFO L226 Difference]: Without dead ends: 104 [2021-02-19 17:45:37,736 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:45:37,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-02-19 17:45:37,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 54. [2021-02-19 17:45:37,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.0) internal successors, (106), 53 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:37,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 106 transitions. [2021-02-19 17:45:37,747 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 106 transitions. Word has length 14 [2021-02-19 17:45:37,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:45:37,747 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 106 transitions. [2021-02-19 17:45:37,747 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) [2021-02-19 17:45:37,747 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 106 transitions. [2021-02-19 17:45:37,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:45:37,747 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:37,747 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:37,962 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-02-19 17:45:37,963 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:37,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:37,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1482712152, now seen corresponding path program 11 times [2021-02-19 17:45:37,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:37,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155492385] [2021-02-19 17:45:37,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:37,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:38,023 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:38,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155492385] [2021-02-19 17:45:38,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804234478] [2021-02-19 17:45:38,023 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 [2021-02-19 17:45:38,042 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:45:38,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:45:38,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:45:38,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:45:38,079 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 24 treesize of output 18 [2021-02-19 17:45:38,080 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:38,082 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 [2021-02-19 17:45:38,083 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:38,093 INFO L628 ElimStorePlain]: treesize reduction 22, result has 29.0 percent of original size [2021-02-19 17:45:38,094 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:45:38,094 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:45:38,094 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:65, output treesize:9 [2021-02-19 17:45:38,107 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:38,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:45:38,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-02-19 17:45:38,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652499698] [2021-02-19 17:45:38,108 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 17:45:38,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:45:38,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 17:45:38,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:45:38,109 INFO L87 Difference]: Start difference. First operand 54 states and 106 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) [2021-02-19 17:45:38,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:45:38,163 INFO L93 Difference]: Finished difference Result 83 states and 161 transitions. [2021-02-19 17:45:38,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 17:45:38,163 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 [2021-02-19 17:45:38,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:45:38,164 INFO L225 Difference]: With dead ends: 83 [2021-02-19 17:45:38,164 INFO L226 Difference]: Without dead ends: 83 [2021-02-19 17:45:38,164 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:45:38,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-02-19 17:45:38,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 58. [2021-02-19 17:45:38,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.0) internal successors, (114), 57 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:38,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 114 transitions. [2021-02-19 17:45:38,166 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 114 transitions. Word has length 15 [2021-02-19 17:45:38,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:45:38,166 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 114 transitions. [2021-02-19 17:45:38,166 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) [2021-02-19 17:45:38,166 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 114 transitions. [2021-02-19 17:45:38,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:45:38,166 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:38,166 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:38,374 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-02-19 17:45:38,374 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:38,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:38,375 INFO L82 PathProgramCache]: Analyzing trace with hash -569959940, now seen corresponding path program 12 times [2021-02-19 17:45:38,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:38,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126180160] [2021-02-19 17:45:38,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:38,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:38,423 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:38,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126180160] [2021-02-19 17:45:38,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940456687] [2021-02-19 17:45:38,423 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 [2021-02-19 17:45:38,451 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-02-19 17:45:38,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:45:38,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:45:38,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:45:38,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:38,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:38,540 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 [2021-02-19 17:45:38,541 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:38,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:38,543 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 17 treesize of output 13 [2021-02-19 17:45:38,544 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:38,558 INFO L628 ElimStorePlain]: treesize reduction 36, result has 29.4 percent of original size [2021-02-19 17:45:38,558 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:45:38,559 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:45:38,559 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-02-19 17:45:38,571 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:38,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:45:38,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-02-19 17:45:38,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855195726] [2021-02-19 17:45:38,572 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:45:38,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:45:38,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:45:38,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:45:38,572 INFO L87 Difference]: Start difference. First operand 58 states and 114 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) [2021-02-19 17:45:38,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:45:38,681 INFO L93 Difference]: Finished difference Result 96 states and 187 transitions. [2021-02-19 17:45:38,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:45:38,682 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 [2021-02-19 17:45:38,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:45:38,682 INFO L225 Difference]: With dead ends: 96 [2021-02-19 17:45:38,682 INFO L226 Difference]: Without dead ends: 96 [2021-02-19 17:45:38,682 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:45:38,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-02-19 17:45:38,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 59. [2021-02-19 17:45:38,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 2.0) internal successors, (116), 58 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:38,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 116 transitions. [2021-02-19 17:45:38,684 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 116 transitions. Word has length 15 [2021-02-19 17:45:38,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:45:38,684 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 116 transitions. [2021-02-19 17:45:38,684 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) [2021-02-19 17:45:38,684 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 116 transitions. [2021-02-19 17:45:38,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:45:38,684 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:38,684 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:38,885 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:45:38,885 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:38,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:38,885 INFO L82 PathProgramCache]: Analyzing trace with hash -918944652, now seen corresponding path program 13 times [2021-02-19 17:45:38,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:38,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476741761] [2021-02-19 17:45:38,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:38,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:38,942 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:38,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476741761] [2021-02-19 17:45:38,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536815133] [2021-02-19 17:45:38,943 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 [2021-02-19 17:45:38,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:38,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 17:45:38,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:45:39,082 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:39,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:45:39,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-02-19 17:45:39,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616795971] [2021-02-19 17:45:39,084 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:45:39,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:45:39,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:45:39,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:45:39,084 INFO L87 Difference]: Start difference. First operand 59 states and 116 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) [2021-02-19 17:45:39,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:45:39,199 INFO L93 Difference]: Finished difference Result 94 states and 184 transitions. [2021-02-19 17:45:39,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:45:39,199 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 [2021-02-19 17:45:39,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:45:39,200 INFO L225 Difference]: With dead ends: 94 [2021-02-19 17:45:39,200 INFO L226 Difference]: Without dead ends: 94 [2021-02-19 17:45:39,200 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:45:39,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-02-19 17:45:39,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 60. [2021-02-19 17:45:39,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.0) internal successors, (118), 59 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:39,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 118 transitions. [2021-02-19 17:45:39,202 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 118 transitions. Word has length 15 [2021-02-19 17:45:39,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:45:39,202 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 118 transitions. [2021-02-19 17:45:39,202 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) [2021-02-19 17:45:39,202 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 118 transitions. [2021-02-19 17:45:39,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:45:39,202 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:39,202 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:39,403 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-02-19 17:45:39,403 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:39,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:39,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1161044691, now seen corresponding path program 14 times [2021-02-19 17:45:39,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:39,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874460166] [2021-02-19 17:45:39,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:39,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:39,471 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:39,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874460166] [2021-02-19 17:45:39,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103318554] [2021-02-19 17:45:39,471 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 [2021-02-19 17:45:39,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:45:39,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:45:39,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 17:45:39,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:45:39,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:39,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:39,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:45:39,601 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:39,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:39,603 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 [2021-02-19 17:45:39,604 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:39,647 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-02-19 17:45:39,648 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:45:39,649 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 8 treesize of output 6 [2021-02-19 17:45:39,650 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:39,661 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:39,661 INFO L518 ElimStorePlain]: Eliminatee v_prenex_17 vanished before elimination [2021-02-19 17:45:39,671 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:45:39,671 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-02-19 17:45:39,702 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:39,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:45:39,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-02-19 17:45:39,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058815746] [2021-02-19 17:45:39,702 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:45:39,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:45:39,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:45:39,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:45:39,703 INFO L87 Difference]: Start difference. First operand 60 states and 118 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) [2021-02-19 17:45:40,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:45:40,004 INFO L93 Difference]: Finished difference Result 84 states and 163 transitions. [2021-02-19 17:45:40,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 17:45:40,005 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 [2021-02-19 17:45:40,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:45:40,005 INFO L225 Difference]: With dead ends: 84 [2021-02-19 17:45:40,005 INFO L226 Difference]: Without dead ends: 84 [2021-02-19 17:45:40,006 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:45:40,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-02-19 17:45:40,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 60. [2021-02-19 17:45:40,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.0) internal successors, (118), 59 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:40,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 118 transitions. [2021-02-19 17:45:40,007 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 118 transitions. Word has length 15 [2021-02-19 17:45:40,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:45:40,007 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 118 transitions. [2021-02-19 17:45:40,007 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) [2021-02-19 17:45:40,007 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 118 transitions. [2021-02-19 17:45:40,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:45:40,008 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:40,008 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:40,208 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:45:40,208 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:40,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:40,209 INFO L82 PathProgramCache]: Analyzing trace with hash 913174998, now seen corresponding path program 15 times [2021-02-19 17:45:40,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:40,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229989734] [2021-02-19 17:45:40,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:40,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:40,271 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:40,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229989734] [2021-02-19 17:45:40,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545989149] [2021-02-19 17:45:40,271 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) [2021-02-19 17:45:40,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 17:45:40,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:45:40,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 17:45:40,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:45:40,386 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:40,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:45:40,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-02-19 17:45:40,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986756656] [2021-02-19 17:45:40,388 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:45:40,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:45:40,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:45:40,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:45:40,388 INFO L87 Difference]: Start difference. First operand 60 states and 118 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) [2021-02-19 17:45:40,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:45:40,442 INFO L93 Difference]: Finished difference Result 71 states and 140 transitions. [2021-02-19 17:45:40,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 17:45:40,442 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 [2021-02-19 17:45:40,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:45:40,443 INFO L225 Difference]: With dead ends: 71 [2021-02-19 17:45:40,443 INFO L226 Difference]: Without dead ends: 71 [2021-02-19 17:45:40,443 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:45:40,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-02-19 17:45:40,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 60. [2021-02-19 17:45:40,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.0) internal successors, (118), 59 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:40,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 118 transitions. [2021-02-19 17:45:40,444 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 118 transitions. Word has length 15 [2021-02-19 17:45:40,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:45:40,444 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 118 transitions. [2021-02-19 17:45:40,445 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) [2021-02-19 17:45:40,445 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 118 transitions. [2021-02-19 17:45:40,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:45:40,445 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:40,445 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:40,645 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-02-19 17:45:40,645 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:40,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:40,646 INFO L82 PathProgramCache]: Analyzing trace with hash 564190286, now seen corresponding path program 16 times [2021-02-19 17:45:40,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:40,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009344862] [2021-02-19 17:45:40,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:40,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:40,704 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:40,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009344862] [2021-02-19 17:45:40,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437454975] [2021-02-19 17:45:40,705 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 [2021-02-19 17:45:40,722 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:45:40,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:45:40,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 17:45:40,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:45:40,835 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:40,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:45:40,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-02-19 17:45:40,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869139429] [2021-02-19 17:45:40,835 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:45:40,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:45:40,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:45:40,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:45:40,836 INFO L87 Difference]: Start difference. First operand 60 states and 118 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) [2021-02-19 17:45:40,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:45:40,880 INFO L93 Difference]: Finished difference Result 80 states and 159 transitions. [2021-02-19 17:45:40,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:45:40,880 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 [2021-02-19 17:45:40,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:45:40,880 INFO L225 Difference]: With dead ends: 80 [2021-02-19 17:45:40,881 INFO L226 Difference]: Without dead ends: 80 [2021-02-19 17:45:40,881 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:45:40,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-02-19 17:45:40,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 60. [2021-02-19 17:45:40,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.0) internal successors, (118), 59 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:40,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 118 transitions. [2021-02-19 17:45:40,882 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 118 transitions. Word has length 15 [2021-02-19 17:45:40,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:45:40,882 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 118 transitions. [2021-02-19 17:45:40,882 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) [2021-02-19 17:45:40,882 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 118 transitions. [2021-02-19 17:45:40,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:45:40,883 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:40,883 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:41,098 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:45:41,098 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:41,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:41,098 INFO L82 PathProgramCache]: Analyzing trace with hash 322090247, now seen corresponding path program 17 times [2021-02-19 17:45:41,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:41,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444653432] [2021-02-19 17:45:41,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:41,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:41,160 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:41,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444653432] [2021-02-19 17:45:41,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47442444] [2021-02-19 17:45:41,161 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 [2021-02-19 17:45:41,179 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:45:41,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:45:41,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 17:45:41,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:45:41,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:41,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:41,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:45:41,267 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:41,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:41,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:45:41,270 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:41,304 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-02-19 17:45:41,304 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:45:41,306 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 [2021-02-19 17:45:41,307 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:41,318 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:41,318 INFO L518 ElimStorePlain]: Eliminatee v_prenex_20 vanished before elimination [2021-02-19 17:45:41,320 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:45:41,320 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-02-19 17:45:41,349 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:41,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:45:41,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-02-19 17:45:41,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831778984] [2021-02-19 17:45:41,350 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:45:41,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:45:41,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:45:41,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:45:41,350 INFO L87 Difference]: Start difference. First operand 60 states and 118 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) [2021-02-19 17:45:41,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:45:41,477 INFO L93 Difference]: Finished difference Result 66 states and 130 transitions. [2021-02-19 17:45:41,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 17:45:41,478 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 [2021-02-19 17:45:41,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:45:41,478 INFO L225 Difference]: With dead ends: 66 [2021-02-19 17:45:41,478 INFO L226 Difference]: Without dead ends: 66 [2021-02-19 17:45:41,478 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:45:41,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-02-19 17:45:41,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 58. [2021-02-19 17:45:41,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.0) internal successors, (114), 57 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:41,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 114 transitions. [2021-02-19 17:45:41,480 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 114 transitions. Word has length 15 [2021-02-19 17:45:41,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:45:41,480 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 114 transitions. [2021-02-19 17:45:41,480 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) [2021-02-19 17:45:41,480 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 114 transitions. [2021-02-19 17:45:41,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:45:41,480 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:41,480 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:41,694 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:45:41,694 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:41,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:41,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1357173292, now seen corresponding path program 18 times [2021-02-19 17:45:41,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:41,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454966269] [2021-02-19 17:45:41,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:41,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:41,757 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:41,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454966269] [2021-02-19 17:45:41,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473493097] [2021-02-19 17:45:41,757 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 [2021-02-19 17:45:41,782 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:45:41,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:45:41,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:45:41,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:45:41,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:41,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:41,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:45:41,852 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:41,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:41,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:41,855 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 17 treesize of output 13 [2021-02-19 17:45:41,856 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:41,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:41,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:41,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:45:41,860 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:41,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:41,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:45:41,863 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:41,904 INFO L628 ElimStorePlain]: treesize reduction 69, result has 37.8 percent of original size [2021-02-19 17:45:41,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:41,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:45:41,908 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:45:41,926 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:41,928 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:45:41,928 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:133, output treesize:22 [2021-02-19 17:45:41,967 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:41,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:45:41,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-02-19 17:45:41,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794847453] [2021-02-19 17:45:41,968 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:45:41,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:45:41,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:45:41,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:45:41,969 INFO L87 Difference]: Start difference. First operand 58 states and 114 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) [2021-02-19 17:45:42,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:45:42,022 INFO L93 Difference]: Finished difference Result 82 states and 154 transitions. [2021-02-19 17:45:42,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 17:45:42,022 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 [2021-02-19 17:45:42,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:45:42,023 INFO L225 Difference]: With dead ends: 82 [2021-02-19 17:45:42,023 INFO L226 Difference]: Without dead ends: 82 [2021-02-19 17:45:42,024 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:45:42,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-02-19 17:45:42,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 60. [2021-02-19 17:45:42,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.016949152542373) internal successors, (119), 59 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) [2021-02-19 17:45:42,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 119 transitions. [2021-02-19 17:45:42,026 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 119 transitions. Word has length 15 [2021-02-19 17:45:42,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:45:42,026 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 119 transitions. [2021-02-19 17:45:42,026 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) [2021-02-19 17:45:42,026 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 119 transitions. [2021-02-19 17:45:42,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:45:42,026 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:42,026 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:42,243 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-02-19 17:45:42,244 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:42,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:42,244 INFO L82 PathProgramCache]: Analyzing trace with hash 704597885, now seen corresponding path program 19 times [2021-02-19 17:45:42,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:42,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954483658] [2021-02-19 17:45:42,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:42,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:42,291 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:42,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954483658] [2021-02-19 17:45:42,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874246129] [2021-02-19 17:45:42,292 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 [2021-02-19 17:45:42,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:42,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 17:45:42,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:45:42,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:42,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:42,377 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 16 treesize of output 12 [2021-02-19 17:45:42,378 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:42,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:42,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:42,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:45:42,382 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:42,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:42,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:42,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:45:42,385 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:42,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:42,388 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 [2021-02-19 17:45:42,388 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:42,415 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-02-19 17:45:42,415 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:45:42,416 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:45:42,416 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-02-19 17:45:42,438 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:42,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:45:42,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-02-19 17:45:42,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304639519] [2021-02-19 17:45:42,438 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:45:42,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:45:42,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:45:42,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:45:42,439 INFO L87 Difference]: Start difference. First operand 60 states and 119 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) [2021-02-19 17:45:42,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:45:42,495 INFO L93 Difference]: Finished difference Result 101 states and 191 transitions. [2021-02-19 17:45:42,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:45:42,496 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 [2021-02-19 17:45:42,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:45:42,496 INFO L225 Difference]: With dead ends: 101 [2021-02-19 17:45:42,496 INFO L226 Difference]: Without dead ends: 101 [2021-02-19 17:45:42,496 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:45:42,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-02-19 17:45:42,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 61. [2021-02-19 17:45:42,498 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) [2021-02-19 17:45:42,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 124 transitions. [2021-02-19 17:45:42,498 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 124 transitions. Word has length 15 [2021-02-19 17:45:42,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:45:42,498 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 124 transitions. [2021-02-19 17:45:42,498 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) [2021-02-19 17:45:42,498 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 124 transitions. [2021-02-19 17:45:42,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:45:42,498 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:42,499 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:42,710 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:45:42,710 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:42,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:42,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1984574840, now seen corresponding path program 20 times [2021-02-19 17:45:42,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:42,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993845227] [2021-02-19 17:45:42,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:42,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:42,781 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:42,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993845227] [2021-02-19 17:45:42,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652974588] [2021-02-19 17:45:42,782 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) [2021-02-19 17:45:42,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:45:42,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:45:42,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 17:45:42,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:45:42,858 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:42,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:45:42,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-02-19 17:45:42,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631524790] [2021-02-19 17:45:42,859 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:45:42,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:45:42,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:45:42,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:45:42,860 INFO L87 Difference]: Start difference. First operand 61 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) [2021-02-19 17:45:42,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:45:42,977 INFO L93 Difference]: Finished difference Result 68 states and 134 transitions. [2021-02-19 17:45:42,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 17:45:42,977 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 [2021-02-19 17:45:42,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:45:42,978 INFO L225 Difference]: With dead ends: 68 [2021-02-19 17:45:42,978 INFO L226 Difference]: Without dead ends: 64 [2021-02-19 17:45:42,978 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:45:42,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-02-19 17:45:42,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 61. [2021-02-19 17:45:42,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.05) internal successors, (123), 60 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) [2021-02-19 17:45:42,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 123 transitions. [2021-02-19 17:45:42,982 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 123 transitions. Word has length 15 [2021-02-19 17:45:42,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:45:42,982 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 123 transitions. [2021-02-19 17:45:42,982 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) [2021-02-19 17:45:42,982 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 123 transitions. [2021-02-19 17:45:42,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:45:42,982 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:42,982 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:43,183 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-02-19 17:45:43,183 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:43,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:43,183 INFO L82 PathProgramCache]: Analyzing trace with hash 374605767, now seen corresponding path program 21 times [2021-02-19 17:45:43,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:43,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366630112] [2021-02-19 17:45:43,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:43,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:43,226 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:43,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366630112] [2021-02-19 17:45:43,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394513929] [2021-02-19 17:45:43,226 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) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:45:43,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:45:43,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:45:43,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:45:43,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:45:43,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:43,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:43,302 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 17 treesize of output 13 [2021-02-19 17:45:43,303 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:43,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:43,304 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 17 treesize of output 13 [2021-02-19 17:45:43,305 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:43,321 INFO L628 ElimStorePlain]: treesize reduction 30, result has 43.4 percent of original size [2021-02-19 17:45:43,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:43,329 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 9 treesize of output 5 [2021-02-19 17:45:43,330 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:45:43,335 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:43,336 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:45:43,336 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:67, output treesize:9 [2021-02-19 17:45:43,352 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:43,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:45:43,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-02-19 17:45:43,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169073485] [2021-02-19 17:45:43,352 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:45:43,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:45:43,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:45:43,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:45:43,353 INFO L87 Difference]: Start difference. First operand 61 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) [2021-02-19 17:45:43,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:45:43,389 INFO L93 Difference]: Finished difference Result 71 states and 140 transitions. [2021-02-19 17:45:43,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 17:45:43,390 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 [2021-02-19 17:45:43,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:45:43,390 INFO L225 Difference]: With dead ends: 71 [2021-02-19 17:45:43,390 INFO L226 Difference]: Without dead ends: 71 [2021-02-19 17:45:43,390 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:45:43,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-02-19 17:45:43,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 60. [2021-02-19 17:45:43,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.016949152542373) internal successors, (119), 59 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) [2021-02-19 17:45:43,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 119 transitions. [2021-02-19 17:45:43,392 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 119 transitions. Word has length 15 [2021-02-19 17:45:43,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:45:43,392 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 119 transitions. [2021-02-19 17:45:43,392 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) [2021-02-19 17:45:43,392 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 119 transitions. [2021-02-19 17:45:43,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:45:43,392 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:43,392 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:43,592 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-02-19 17:45:43,593 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:43,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:43,593 INFO L82 PathProgramCache]: Analyzing trace with hash -776767906, now seen corresponding path program 22 times [2021-02-19 17:45:43,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:43,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760024719] [2021-02-19 17:45:43,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:43,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:43,650 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:43,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760024719] [2021-02-19 17:45:43,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067500886] [2021-02-19 17:45:43,650 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 [2021-02-19 17:45:43,665 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:45:43,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:45:43,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 17:45:43,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:45:43,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:43,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:43,737 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 15 treesize of output 11 [2021-02-19 17:45:43,738 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:43,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:43,740 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 16 treesize of output 12 [2021-02-19 17:45:43,741 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:43,753 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-02-19 17:45:43,754 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:45:43,754 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:45:43,755 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-02-19 17:45:43,766 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:43,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:45:43,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-02-19 17:45:43,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181859726] [2021-02-19 17:45:43,767 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:45:43,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:45:43,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:45:43,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:45:43,769 INFO L87 Difference]: Start difference. First operand 60 states and 119 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) [2021-02-19 17:45:43,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:45:43,811 INFO L93 Difference]: Finished difference Result 68 states and 135 transitions. [2021-02-19 17:45:43,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 17:45:43,811 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 [2021-02-19 17:45:43,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:45:43,812 INFO L225 Difference]: With dead ends: 68 [2021-02-19 17:45:43,812 INFO L226 Difference]: Without dead ends: 68 [2021-02-19 17:45:43,813 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:45:43,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-02-19 17:45:43,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 60. [2021-02-19 17:45:43,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.016949152542373) internal successors, (119), 59 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) [2021-02-19 17:45:43,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 119 transitions. [2021-02-19 17:45:43,819 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 119 transitions. Word has length 15 [2021-02-19 17:45:43,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:45:43,819 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 119 transitions. [2021-02-19 17:45:43,820 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) [2021-02-19 17:45:43,820 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 119 transitions. [2021-02-19 17:45:43,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:45:43,820 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:43,820 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:44,034 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:45:44,034 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:44,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:44,034 INFO L82 PathProgramCache]: Analyzing trace with hash -920514934, now seen corresponding path program 23 times [2021-02-19 17:45:44,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:44,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469143755] [2021-02-19 17:45:44,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:44,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:44,084 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:44,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469143755] [2021-02-19 17:45:44,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134811756] [2021-02-19 17:45:44,084 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 [2021-02-19 17:45:44,100 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:45:44,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:45:44,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 17:45:44,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:45:44,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:44,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:44,185 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 16 treesize of output 12 [2021-02-19 17:45:44,186 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:44,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:44,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:44,189 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 17 treesize of output 13 [2021-02-19 17:45:44,189 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:44,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:44,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:44,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:45:44,195 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:44,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:44,199 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 16 treesize of output 12 [2021-02-19 17:45:44,199 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:44,228 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-02-19 17:45:44,228 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:45:44,229 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:45:44,230 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-02-19 17:45:44,269 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:44,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:45:44,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-02-19 17:45:44,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070303650] [2021-02-19 17:45:44,270 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:45:44,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:45:44,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:45:44,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:45:44,270 INFO L87 Difference]: Start difference. First operand 60 states and 119 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) [2021-02-19 17:45:44,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:45:44,326 INFO L93 Difference]: Finished difference Result 76 states and 151 transitions. [2021-02-19 17:45:44,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:45:44,326 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 [2021-02-19 17:45:44,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:45:44,327 INFO L225 Difference]: With dead ends: 76 [2021-02-19 17:45:44,327 INFO L226 Difference]: Without dead ends: 76 [2021-02-19 17:45:44,328 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:45:44,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-02-19 17:45:44,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 60. [2021-02-19 17:45:44,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.016949152542373) internal successors, (119), 59 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) [2021-02-19 17:45:44,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 119 transitions. [2021-02-19 17:45:44,329 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 119 transitions. Word has length 15 [2021-02-19 17:45:44,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:45:44,329 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 119 transitions. [2021-02-19 17:45:44,329 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) [2021-02-19 17:45:44,329 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 119 transitions. [2021-02-19 17:45:44,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:45:44,329 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:44,329 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:44,544 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:45:44,544 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:44,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:44,544 INFO L82 PathProgramCache]: Analyzing trace with hash -1367852657, now seen corresponding path program 24 times [2021-02-19 17:45:44,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:44,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490231844] [2021-02-19 17:45:44,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:44,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:44,596 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:44,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490231844] [2021-02-19 17:45:44,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485855923] [2021-02-19 17:45:44,596 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 [2021-02-19 17:45:44,612 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:45:44,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:45:44,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:45:44,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:45:44,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:44,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:44,666 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 18 treesize of output 14 [2021-02-19 17:45:44,666 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:44,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:44,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:44,669 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 [2021-02-19 17:45:44,670 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:44,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:44,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:44,672 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 18 treesize of output 14 [2021-02-19 17:45:44,673 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:44,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:44,675 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 17 treesize of output 13 [2021-02-19 17:45:44,676 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:44,717 INFO L628 ElimStorePlain]: treesize reduction 59, result has 43.8 percent of original size [2021-02-19 17:45:44,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:44,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:44,720 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 10 treesize of output 6 [2021-02-19 17:45:44,721 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:45:44,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:44,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:45:44,725 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:45:44,740 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:44,742 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:45:44,742 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:133, output treesize:22 [2021-02-19 17:45:44,774 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:44,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:45:44,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-02-19 17:45:44,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228114915] [2021-02-19 17:45:44,775 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:45:44,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:45:44,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:45:44,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:45:44,776 INFO L87 Difference]: Start difference. First operand 60 states and 119 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) [2021-02-19 17:45:44,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:45:44,818 INFO L93 Difference]: Finished difference Result 63 states and 125 transitions. [2021-02-19 17:45:44,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 17:45:44,818 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 [2021-02-19 17:45:44,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:45:44,819 INFO L225 Difference]: With dead ends: 63 [2021-02-19 17:45:44,819 INFO L226 Difference]: Without dead ends: 63 [2021-02-19 17:45:44,819 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:45:44,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-02-19 17:45:44,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 58. [2021-02-19 17:45:44,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.017543859649123) internal successors, (115), 57 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:44,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 115 transitions. [2021-02-19 17:45:44,822 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 115 transitions. Word has length 15 [2021-02-19 17:45:44,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:45:44,822 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 115 transitions. [2021-02-19 17:45:44,822 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) [2021-02-19 17:45:44,822 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 115 transitions. [2021-02-19 17:45:44,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:45:44,822 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:44,822 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:45,030 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:45:45,030 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:45,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:45,030 INFO L82 PathProgramCache]: Analyzing trace with hash -332769612, now seen corresponding path program 25 times [2021-02-19 17:45:45,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:45,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911922522] [2021-02-19 17:45:45,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:45,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:45,097 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:45,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911922522] [2021-02-19 17:45:45,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87668617] [2021-02-19 17:45:45,098 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) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:45:45,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:45,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 17:45:45,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:45:45,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:45,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:45,203 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 17 treesize of output 13 [2021-02-19 17:45:45,204 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:45,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:45,207 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 16 treesize of output 12 [2021-02-19 17:45:45,208 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:45,240 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-02-19 17:45:45,240 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:45:45,242 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 [2021-02-19 17:45:45,243 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:45,254 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:45,254 INFO L518 ElimStorePlain]: Eliminatee v_prenex_22 vanished before elimination [2021-02-19 17:45:45,255 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:45:45,256 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-02-19 17:45:45,279 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:45,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:45:45,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-02-19 17:45:45,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937872560] [2021-02-19 17:45:45,279 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:45:45,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:45:45,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:45:45,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:45:45,280 INFO L87 Difference]: Start difference. First operand 58 states and 115 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) [2021-02-19 17:45:45,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:45:45,375 INFO L93 Difference]: Finished difference Result 79 states and 149 transitions. [2021-02-19 17:45:45,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 17:45:45,375 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 [2021-02-19 17:45:45,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:45:45,376 INFO L225 Difference]: With dead ends: 79 [2021-02-19 17:45:45,376 INFO L226 Difference]: Without dead ends: 79 [2021-02-19 17:45:45,376 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:45:45,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-02-19 17:45:45,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 60. [2021-02-19 17:45:45,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.0338983050847457) internal successors, (120), 59 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:45,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 120 transitions. [2021-02-19 17:45:45,377 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 120 transitions. Word has length 15 [2021-02-19 17:45:45,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:45:45,377 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 120 transitions. [2021-02-19 17:45:45,377 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) [2021-02-19 17:45:45,377 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 120 transitions. [2021-02-19 17:45:45,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:45:45,378 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:45,378 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:45,586 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-02-19 17:45:45,586 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:45,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:45,586 INFO L82 PathProgramCache]: Analyzing trace with hash -985345019, now seen corresponding path program 26 times [2021-02-19 17:45:45,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:45,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178663272] [2021-02-19 17:45:45,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:45,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:45,633 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:45,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178663272] [2021-02-19 17:45:45,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194909102] [2021-02-19 17:45:45,633 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) [2021-02-19 17:45:45,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:45:45,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:45:45,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 17:45:45,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:45:45,747 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:45,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:45:45,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-02-19 17:45:45,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138788056] [2021-02-19 17:45:45,747 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:45:45,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:45:45,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:45:45,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:45:45,748 INFO L87 Difference]: Start difference. First operand 60 states and 120 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) [2021-02-19 17:45:45,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:45:45,848 INFO L93 Difference]: Finished difference Result 98 states and 186 transitions. [2021-02-19 17:45:45,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:45:45,849 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 [2021-02-19 17:45:45,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:45:45,849 INFO L225 Difference]: With dead ends: 98 [2021-02-19 17:45:45,849 INFO L226 Difference]: Without dead ends: 98 [2021-02-19 17:45:45,850 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:45:45,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-02-19 17:45:45,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 61. [2021-02-19 17:45:45,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.0833333333333335) internal successors, (125), 60 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:45,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 125 transitions. [2021-02-19 17:45:45,856 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 125 transitions. Word has length 15 [2021-02-19 17:45:45,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:45:45,856 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 125 transitions. [2021-02-19 17:45:45,856 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) [2021-02-19 17:45:45,856 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 125 transitions. [2021-02-19 17:45:45,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:45:45,856 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:45,856 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:46,070 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:45:46,070 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:46,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:46,070 INFO L82 PathProgramCache]: Analyzing trace with hash 294631936, now seen corresponding path program 27 times [2021-02-19 17:45:46,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:46,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483697024] [2021-02-19 17:45:46,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:46,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:46,145 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:46,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483697024] [2021-02-19 17:45:46,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119379415] [2021-02-19 17:45:46,145 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 [2021-02-19 17:45:46,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 17:45:46,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:45:46,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 17:45:46,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:45:46,257 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:46,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:45:46,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-02-19 17:45:46,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81715354] [2021-02-19 17:45:46,257 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:45:46,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:45:46,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:45:46,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:45:46,258 INFO L87 Difference]: Start difference. First operand 61 states and 125 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) [2021-02-19 17:45:46,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:45:46,400 INFO L93 Difference]: Finished difference Result 65 states and 129 transitions. [2021-02-19 17:45:46,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 17:45:46,401 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 [2021-02-19 17:45:46,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:45:46,401 INFO L225 Difference]: With dead ends: 65 [2021-02-19 17:45:46,401 INFO L226 Difference]: Without dead ends: 61 [2021-02-19 17:45:46,401 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:45:46,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-02-19 17:45:46,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-02-19 17:45:46,402 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) [2021-02-19 17:45:46,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 124 transitions. [2021-02-19 17:45:46,402 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 124 transitions. Word has length 15 [2021-02-19 17:45:46,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:45:46,402 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 124 transitions. [2021-02-19 17:45:46,403 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) [2021-02-19 17:45:46,403 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 124 transitions. [2021-02-19 17:45:46,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:45:46,403 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:46,403 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:46,610 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:45:46,610 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:46,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:46,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1315337137, now seen corresponding path program 28 times [2021-02-19 17:45:46,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:46,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591495462] [2021-02-19 17:45:46,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:46,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:46,659 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:46,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591495462] [2021-02-19 17:45:46,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579229480] [2021-02-19 17:45:46,659 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) [2021-02-19 17:45:46,692 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:45:46,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:45:46,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 15 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:45:46,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:45:46,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:46,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:46,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:45:46,759 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:46,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:46,762 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 [2021-02-19 17:45:46,762 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:46,780 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-02-19 17:45:46,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:46,782 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 9 treesize of output 5 [2021-02-19 17:45:46,783 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:45:46,788 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:46,789 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:45:46,789 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-02-19 17:45:46,803 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:46,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:45:46,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-02-19 17:45:46,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134391782] [2021-02-19 17:45:46,803 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:45:46,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:45:46,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:45:46,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:45:46,804 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) [2021-02-19 17:45:46,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:45:46,845 INFO L93 Difference]: Finished difference Result 68 states and 135 transitions. [2021-02-19 17:45:46,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 17:45:46,845 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 [2021-02-19 17:45:46,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:45:46,846 INFO L225 Difference]: With dead ends: 68 [2021-02-19 17:45:46,846 INFO L226 Difference]: Without dead ends: 68 [2021-02-19 17:45:46,846 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:45:46,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-02-19 17:45:46,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 57. [2021-02-19 17:45:46,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.017857142857143) internal successors, (113), 56 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:46,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 113 transitions. [2021-02-19 17:45:46,847 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 113 transitions. Word has length 15 [2021-02-19 17:45:46,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:45:46,847 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 113 transitions. [2021-02-19 17:45:46,847 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) [2021-02-19 17:45:46,847 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 113 transitions. [2021-02-19 17:45:46,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:45:46,847 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:46,848 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:47,048 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-02-19 17:45:47,048 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:47,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:47,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1661467032, now seen corresponding path program 29 times [2021-02-19 17:45:47,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:47,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283911543] [2021-02-19 17:45:47,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:47,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:47,109 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:47,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283911543] [2021-02-19 17:45:47,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948917936] [2021-02-19 17:45:47,110 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 [2021-02-19 17:45:47,127 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:45:47,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:45:47,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:45:47,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:45:47,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:47,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:47,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:45:47,225 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:47,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:47,229 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 18 treesize of output 14 [2021-02-19 17:45:47,230 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:47,277 INFO L628 ElimStorePlain]: treesize reduction 84, result has 34.9 percent of original size [2021-02-19 17:45:47,277 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:45:47,279 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 [2021-02-19 17:45:47,280 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:47,300 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:47,300 INFO L518 ElimStorePlain]: Eliminatee v_prenex_26 vanished before elimination [2021-02-19 17:45:47,301 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:45:47,301 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:141, output treesize:22 [2021-02-19 17:45:47,337 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:47,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:45:47,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-02-19 17:45:47,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785224076] [2021-02-19 17:45:47,338 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:45:47,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:45:47,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:45:47,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:45:47,338 INFO L87 Difference]: Start difference. First operand 57 states and 113 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) [2021-02-19 17:45:47,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:45:47,450 INFO L93 Difference]: Finished difference Result 79 states and 147 transitions. [2021-02-19 17:45:47,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 17:45:47,450 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 [2021-02-19 17:45:47,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:45:47,451 INFO L225 Difference]: With dead ends: 79 [2021-02-19 17:45:47,451 INFO L226 Difference]: Without dead ends: 79 [2021-02-19 17:45:47,451 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:45:47,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-02-19 17:45:47,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 57. [2021-02-19 17:45:47,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.017857142857143) internal successors, (113), 56 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:47,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 113 transitions. [2021-02-19 17:45:47,453 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 113 transitions. Word has length 15 [2021-02-19 17:45:47,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:45:47,453 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 113 transitions. [2021-02-19 17:45:47,453 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) [2021-02-19 17:45:47,453 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 113 transitions. [2021-02-19 17:45:47,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:45:47,453 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:47,453 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:47,668 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2021-02-19 17:45:47,668 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:47,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:47,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1980924857, now seen corresponding path program 30 times [2021-02-19 17:45:47,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:47,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068222831] [2021-02-19 17:45:47,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:47,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:47,718 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:47,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068222831] [2021-02-19 17:45:47,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203967399] [2021-02-19 17:45:47,718 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 [2021-02-19 17:45:47,736 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-02-19 17:45:47,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:45:47,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:45:47,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:45:47,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:47,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:47,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:45:47,814 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:47,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:47,817 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 17 treesize of output 13 [2021-02-19 17:45:47,818 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:47,866 INFO L628 ElimStorePlain]: treesize reduction 70, result has 41.2 percent of original size [2021-02-19 17:45:47,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:47,868 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 9 treesize of output 5 [2021-02-19 17:45:47,870 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:45:47,886 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:47,888 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 [2021-02-19 17:45:47,889 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:47,903 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:47,903 INFO L518 ElimStorePlain]: Eliminatee v_prenex_29 vanished before elimination [2021-02-19 17:45:47,904 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:45:47,904 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-02-19 17:45:47,936 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:47,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:45:47,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-02-19 17:45:47,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771892760] [2021-02-19 17:45:47,936 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:45:47,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:45:47,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:45:47,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:45:47,937 INFO L87 Difference]: Start difference. First operand 57 states and 113 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) [2021-02-19 17:45:48,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:45:48,138 INFO L93 Difference]: Finished difference Result 108 states and 196 transitions. [2021-02-19 17:45:48,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:45:48,138 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 15 [2021-02-19 17:45:48,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:45:48,139 INFO L225 Difference]: With dead ends: 108 [2021-02-19 17:45:48,139 INFO L226 Difference]: Without dead ends: 108 [2021-02-19 17:45:48,139 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:45:48,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-02-19 17:45:48,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 57. [2021-02-19 17:45:48,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.0357142857142856) internal successors, (114), 56 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:48,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 114 transitions. [2021-02-19 17:45:48,140 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 114 transitions. Word has length 15 [2021-02-19 17:45:48,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:45:48,140 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 114 transitions. [2021-02-19 17:45:48,140 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) [2021-02-19 17:45:48,140 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 114 transitions. [2021-02-19 17:45:48,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:45:48,141 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:48,141 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:48,355 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:45:48,356 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:48,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:48,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1034065484, now seen corresponding path program 31 times [2021-02-19 17:45:48,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:48,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137568726] [2021-02-19 17:45:48,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:48,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:48,404 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:48,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137568726] [2021-02-19 17:45:48,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320586576] [2021-02-19 17:45:48,404 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) [2021-02-19 17:45:48,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:48,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 17:45:48,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:45:48,530 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:48,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:45:48,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-02-19 17:45:48,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479594517] [2021-02-19 17:45:48,531 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:45:48,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:45:48,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:45:48,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:45:48,532 INFO L87 Difference]: Start difference. First operand 57 states and 114 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) [2021-02-19 17:45:48,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:45:48,834 INFO L93 Difference]: Finished difference Result 76 states and 139 transitions. [2021-02-19 17:45:48,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 17:45:48,835 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 [2021-02-19 17:45:48,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:45:48,835 INFO L225 Difference]: With dead ends: 76 [2021-02-19 17:45:48,835 INFO L226 Difference]: Without dead ends: 72 [2021-02-19 17:45:48,835 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:45:48,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-02-19 17:45:48,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 57. [2021-02-19 17:45:48,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.017857142857143) internal successors, (113), 56 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:48,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 113 transitions. [2021-02-19 17:45:48,837 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 113 transitions. Word has length 15 [2021-02-19 17:45:48,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:45:48,837 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 113 transitions. [2021-02-19 17:45:48,837 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) [2021-02-19 17:45:48,837 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 113 transitions. [2021-02-19 17:45:48,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:45:48,837 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:48,837 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:49,037 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-02-19 17:45:49,038 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:49,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:49,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1650932739, now seen corresponding path program 32 times [2021-02-19 17:45:49,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:49,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555857240] [2021-02-19 17:45:49,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:49,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:49,086 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:49,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555857240] [2021-02-19 17:45:49,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011889611] [2021-02-19 17:45:49,086 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 [2021-02-19 17:45:49,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:45:49,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:45:49,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:45:49,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:45:49,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:49,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:49,192 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 [2021-02-19 17:45:49,193 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:49,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:49,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:45:49,196 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:49,215 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-02-19 17:45:49,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:49,217 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 9 treesize of output 5 [2021-02-19 17:45:49,218 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:45:49,223 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:49,224 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:45:49,224 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-02-19 17:45:49,239 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:49,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:45:49,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-02-19 17:45:49,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906545179] [2021-02-19 17:45:49,240 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:45:49,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:45:49,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:45:49,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:45:49,240 INFO L87 Difference]: Start difference. First operand 57 states and 113 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) [2021-02-19 17:45:49,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:45:49,328 INFO L93 Difference]: Finished difference Result 86 states and 161 transitions. [2021-02-19 17:45:49,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:45:49,328 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 [2021-02-19 17:45:49,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:45:49,328 INFO L225 Difference]: With dead ends: 86 [2021-02-19 17:45:49,329 INFO L226 Difference]: Without dead ends: 86 [2021-02-19 17:45:49,329 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:45:49,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-02-19 17:45:49,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 56. [2021-02-19 17:45:49,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.018181818181818) internal successors, (111), 55 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:49,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 111 transitions. [2021-02-19 17:45:49,330 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 111 transitions. Word has length 15 [2021-02-19 17:45:49,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:45:49,330 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 111 transitions. [2021-02-19 17:45:49,330 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) [2021-02-19 17:45:49,330 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 111 transitions. [2021-02-19 17:45:49,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:45:49,331 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:49,331 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:49,546 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable163 [2021-02-19 17:45:49,546 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:49,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:49,546 INFO L82 PathProgramCache]: Analyzing trace with hash -446320162, now seen corresponding path program 33 times [2021-02-19 17:45:49,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:49,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374058315] [2021-02-19 17:45:49,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:49,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:49,587 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:49,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374058315] [2021-02-19 17:45:49,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470040836] [2021-02-19 17:45:49,587 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 [2021-02-19 17:45:49,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 17:45:49,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:45:49,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 17:45:49,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:45:49,651 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:49,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:45:49,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-02-19 17:45:49,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619601276] [2021-02-19 17:45:49,651 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 17:45:49,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:45:49,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 17:45:49,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:45:49,652 INFO L87 Difference]: Start difference. First operand 56 states and 111 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) [2021-02-19 17:45:49,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:45:49,845 INFO L93 Difference]: Finished difference Result 60 states and 115 transitions. [2021-02-19 17:45:49,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 17:45:49,846 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 [2021-02-19 17:45:49,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:45:49,846 INFO L225 Difference]: With dead ends: 60 [2021-02-19 17:45:49,846 INFO L226 Difference]: Without dead ends: 54 [2021-02-19 17:45:49,846 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:45:49,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-02-19 17:45:49,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-02-19 17:45:49,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.018867924528302) internal successors, (107), 53 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) [2021-02-19 17:45:49,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 107 transitions. [2021-02-19 17:45:49,848 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 107 transitions. Word has length 15 [2021-02-19 17:45:49,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:45:49,848 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 107 transitions. [2021-02-19 17:45:49,848 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) [2021-02-19 17:45:49,848 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 107 transitions. [2021-02-19 17:45:49,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:45:49,848 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:49,848 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:50,062 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:45:50,062 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:50,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:50,062 INFO L82 PathProgramCache]: Analyzing trace with hash 638240207, now seen corresponding path program 34 times [2021-02-19 17:45:50,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:50,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462776151] [2021-02-19 17:45:50,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:50,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:50,096 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:50,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462776151] [2021-02-19 17:45:50,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602822931] [2021-02-19 17:45:50,096 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 [2021-02-19 17:45:50,126 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:45:50,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:45:50,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:45:50,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:45:50,177 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 [2021-02-19 17:45:50,178 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:50,179 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 [2021-02-19 17:45:50,180 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:50,192 INFO L628 ElimStorePlain]: treesize reduction 19, result has 38.7 percent of original size [2021-02-19 17:45:50,192 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:45:50,193 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:45:50,193 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:65, output treesize:12 [2021-02-19 17:45:50,208 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:50,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:45:50,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-02-19 17:45:50,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617454692] [2021-02-19 17:45:50,208 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:45:50,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:45:50,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:45:50,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:45:50,209 INFO L87 Difference]: Start difference. First operand 54 states and 107 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) [2021-02-19 17:45:50,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:45:50,262 INFO L93 Difference]: Finished difference Result 64 states and 124 transitions. [2021-02-19 17:45:50,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 17:45:50,262 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 [2021-02-19 17:45:50,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:45:50,262 INFO L225 Difference]: With dead ends: 64 [2021-02-19 17:45:50,262 INFO L226 Difference]: Without dead ends: 64 [2021-02-19 17:45:50,262 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:45:50,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-02-19 17:45:50,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 52. [2021-02-19 17:45:50,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 51 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:50,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 100 transitions. [2021-02-19 17:45:50,264 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 100 transitions. Word has length 15 [2021-02-19 17:45:50,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:45:50,264 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 100 transitions. [2021-02-19 17:45:50,264 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) [2021-02-19 17:45:50,264 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 100 transitions. [2021-02-19 17:45:50,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:45:50,264 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:50,264 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:50,466 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-02-19 17:45:50,466 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:50,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:50,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1307187962, now seen corresponding path program 35 times [2021-02-19 17:45:50,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:50,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695749089] [2021-02-19 17:45:50,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:50,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:50,599 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:50,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695749089] [2021-02-19 17:45:50,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988589057] [2021-02-19 17:45:50,599 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 [2021-02-19 17:45:50,617 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:45:50,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:45:50,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:45:50,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:45:50,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:50,735 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 [2021-02-19 17:45:50,735 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:50,741 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:50,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:50,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:45:50,745 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:45:50,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:50,751 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:45:50,751 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:32, output treesize:13 [2021-02-19 17:45:50,782 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:50,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:45:50,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-02-19 17:45:50,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848789159] [2021-02-19 17:45:50,783 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:45:50,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:45:50,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:45:50,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:45:50,783 INFO L87 Difference]: Start difference. First operand 52 states and 100 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) [2021-02-19 17:45:50,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:45:50,954 INFO L93 Difference]: Finished difference Result 98 states and 183 transitions. [2021-02-19 17:45:50,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:45:50,956 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 [2021-02-19 17:45:50,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:45:50,956 INFO L225 Difference]: With dead ends: 98 [2021-02-19 17:45:50,956 INFO L226 Difference]: Without dead ends: 91 [2021-02-19 17:45:50,957 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:45:50,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-02-19 17:45:50,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 62. [2021-02-19 17:45:50,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.9508196721311475) internal successors, (119), 61 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) [2021-02-19 17:45:50,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 119 transitions. [2021-02-19 17:45:50,958 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 119 transitions. Word has length 16 [2021-02-19 17:45:50,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:45:50,958 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 119 transitions. [2021-02-19 17:45:50,958 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) [2021-02-19 17:45:50,958 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 119 transitions. [2021-02-19 17:45:50,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:45:50,958 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:50,958 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:51,172 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-02-19 17:45:51,173 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:51,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:51,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1945399476, now seen corresponding path program 36 times [2021-02-19 17:45:51,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:51,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859391241] [2021-02-19 17:45:51,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:51,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:51,315 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:51,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859391241] [2021-02-19 17:45:51,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902277486] [2021-02-19 17:45:51,316 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 [2021-02-19 17:45:51,346 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-02-19 17:45:51,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:45:51,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:45:51,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:45:51,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:51,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:45:51,497 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:51,504 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:51,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:51,506 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 13 treesize of output 9 [2021-02-19 17:45:51,509 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:45:51,516 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:51,517 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:45:51,517 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:32, output treesize:13 [2021-02-19 17:45:51,556 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:51,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:45:51,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-02-19 17:45:51,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962557405] [2021-02-19 17:45:51,557 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:45:51,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:45:51,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:45:51,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:45:51,557 INFO L87 Difference]: Start difference. First operand 62 states and 119 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) [2021-02-19 17:45:51,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:45:51,748 INFO L93 Difference]: Finished difference Result 102 states and 191 transitions. [2021-02-19 17:45:51,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:45:51,748 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 [2021-02-19 17:45:51,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:45:51,748 INFO L225 Difference]: With dead ends: 102 [2021-02-19 17:45:51,748 INFO L226 Difference]: Without dead ends: 95 [2021-02-19 17:45:51,749 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:45:51,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-02-19 17:45:51,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 63. [2021-02-19 17:45:51,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.967741935483871) internal successors, (122), 62 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) [2021-02-19 17:45:51,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 122 transitions. [2021-02-19 17:45:51,750 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 122 transitions. Word has length 16 [2021-02-19 17:45:51,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:45:51,750 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 122 transitions. [2021-02-19 17:45:51,750 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) [2021-02-19 17:45:51,750 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 122 transitions. [2021-02-19 17:45:51,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:45:51,750 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:51,750 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:51,964 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2021-02-19 17:45:51,965 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:51,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:51,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1600631926, now seen corresponding path program 37 times [2021-02-19 17:45:51,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:51,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011047661] [2021-02-19 17:45:51,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:51,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:52,112 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:52,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011047661] [2021-02-19 17:45:52,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753265385] [2021-02-19 17:45:52,112 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) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:45:52,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:52,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:45:52,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:45:52,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:52,308 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 27 treesize of output 21 [2021-02-19 17:45:52,309 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:52,314 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:52,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:52,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:45:52,317 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:52,322 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:52,323 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:45:52,323 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-02-19 17:45:52,358 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:52,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:45:52,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-02-19 17:45:52,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099194551] [2021-02-19 17:45:52,358 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:45:52,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:45:52,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:45:52,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:45:52,359 INFO L87 Difference]: Start difference. First operand 63 states and 122 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) [2021-02-19 17:45:52,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:45:52,737 INFO L93 Difference]: Finished difference Result 122 states and 231 transitions. [2021-02-19 17:45:52,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:45:52,737 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 [2021-02-19 17:45:52,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:45:52,738 INFO L225 Difference]: With dead ends: 122 [2021-02-19 17:45:52,738 INFO L226 Difference]: Without dead ends: 106 [2021-02-19 17:45:52,738 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:45:52,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-02-19 17:45:52,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 65. [2021-02-19 17:45:52,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 2.0) internal successors, (128), 64 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) [2021-02-19 17:45:52,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 128 transitions. [2021-02-19 17:45:52,740 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 128 transitions. Word has length 16 [2021-02-19 17:45:52,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:45:52,740 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 128 transitions. [2021-02-19 17:45:52,740 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) [2021-02-19 17:45:52,740 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 128 transitions. [2021-02-19 17:45:52,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:45:52,740 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:52,740 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:52,940 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable176 [2021-02-19 17:45:52,940 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:52,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:52,941 INFO L82 PathProgramCache]: Analyzing trace with hash -462264538, now seen corresponding path program 38 times [2021-02-19 17:45:52,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:52,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441860781] [2021-02-19 17:45:52,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:52,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:53,070 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:53,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441860781] [2021-02-19 17:45:53,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492783339] [2021-02-19 17:45:53,071 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 [2021-02-19 17:45:53,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:45:53,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:45:53,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:45:53,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:45:53,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:53,203 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 27 treesize of output 21 [2021-02-19 17:45:53,203 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:53,209 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:53,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:53,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:45:53,212 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:45:53,217 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:53,217 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:45:53,217 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-02-19 17:45:53,247 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:53,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:45:53,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-02-19 17:45:53,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44316075] [2021-02-19 17:45:53,247 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:45:53,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:45:53,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:45:53,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:45:53,248 INFO L87 Difference]: Start difference. First operand 65 states and 128 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) [2021-02-19 17:45:53,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:45:53,403 INFO L93 Difference]: Finished difference Result 83 states and 159 transitions. [2021-02-19 17:45:53,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:45:53,404 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 [2021-02-19 17:45:53,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:45:53,404 INFO L225 Difference]: With dead ends: 83 [2021-02-19 17:45:53,404 INFO L226 Difference]: Without dead ends: 76 [2021-02-19 17:45:53,404 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:45:53,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-02-19 17:45:53,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 67. [2021-02-19 17:45:53,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 2.015151515151515) internal successors, (133), 66 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) [2021-02-19 17:45:53,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 133 transitions. [2021-02-19 17:45:53,406 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 133 transitions. Word has length 16 [2021-02-19 17:45:53,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:45:53,406 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 133 transitions. [2021-02-19 17:45:53,406 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) [2021-02-19 17:45:53,406 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 133 transitions. [2021-02-19 17:45:53,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:45:53,406 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:53,406 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:53,618 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:45:53,618 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:53,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:53,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1211200432, now seen corresponding path program 39 times [2021-02-19 17:45:53,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:53,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279861581] [2021-02-19 17:45:53,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:53,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:53,750 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:53,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279861581] [2021-02-19 17:45:53,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729304448] [2021-02-19 17:45:53,750 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 [2021-02-19 17:45:53,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 17:45:53,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:45:53,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:45:53,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:45:53,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:53,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:45:53,901 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:53,907 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:53,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:53,909 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 [2021-02-19 17:45:53,911 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:45:53,917 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:53,918 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:45:53,918 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:32, output treesize:13 [2021-02-19 17:45:53,956 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:53,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:45:53,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-02-19 17:45:53,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510362715] [2021-02-19 17:45:53,957 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:45:53,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:45:53,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:45:53,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:45:53,957 INFO L87 Difference]: Start difference. First operand 67 states and 133 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) [2021-02-19 17:45:54,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:45:54,190 INFO L93 Difference]: Finished difference Result 93 states and 181 transitions. [2021-02-19 17:45:54,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:45:54,191 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 [2021-02-19 17:45:54,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:45:54,191 INFO L225 Difference]: With dead ends: 93 [2021-02-19 17:45:54,191 INFO L226 Difference]: Without dead ends: 86 [2021-02-19 17:45:54,191 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:45:54,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-02-19 17:45:54,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 68. [2021-02-19 17:45:54,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.029850746268657) internal successors, (136), 67 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) [2021-02-19 17:45:54,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 136 transitions. [2021-02-19 17:45:54,195 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 136 transitions. Word has length 16 [2021-02-19 17:45:54,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:45:54,195 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 136 transitions. [2021-02-19 17:45:54,195 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) [2021-02-19 17:45:54,195 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 136 transitions. [2021-02-19 17:45:54,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:45:54,196 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:54,196 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:54,396 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:45:54,396 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:54,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:54,397 INFO L82 PathProgramCache]: Analyzing trace with hash -819717658, now seen corresponding path program 40 times [2021-02-19 17:45:54,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:54,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397685900] [2021-02-19 17:45:54,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:54,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:54,551 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:54,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397685900] [2021-02-19 17:45:54,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51181444] [2021-02-19 17:45:54,552 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 [2021-02-19 17:45:54,569 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:45:54,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:45:54,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:45:54,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:45:54,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:54,692 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 [2021-02-19 17:45:54,693 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:54,713 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:54,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:54,716 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 10 treesize of output 6 [2021-02-19 17:45:54,717 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:45:54,737 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:54,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:54,740 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 [2021-02-19 17:45:54,741 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:54,758 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:54,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:54,761 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 [2021-02-19 17:45:54,763 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:45:54,779 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:54,781 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:45:54,781 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:35 [2021-02-19 17:45:54,845 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:54,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:45:54,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-02-19 17:45:54,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101502945] [2021-02-19 17:45:54,846 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:45:54,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:45:54,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:45:54,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:45:54,846 INFO L87 Difference]: Start difference. First operand 68 states and 136 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) [2021-02-19 17:45:55,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:45:55,192 INFO L93 Difference]: Finished difference Result 112 states and 209 transitions. [2021-02-19 17:45:55,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:45:55,192 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 [2021-02-19 17:45:55,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:45:55,193 INFO L225 Difference]: With dead ends: 112 [2021-02-19 17:45:55,193 INFO L226 Difference]: Without dead ends: 96 [2021-02-19 17:45:55,193 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:45:55,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-02-19 17:45:55,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 70. [2021-02-19 17:45:55,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 2.072463768115942) internal successors, (143), 69 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:55,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 143 transitions. [2021-02-19 17:45:55,194 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 143 transitions. Word has length 16 [2021-02-19 17:45:55,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:45:55,194 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 143 transitions. [2021-02-19 17:45:55,194 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) [2021-02-19 17:45:55,194 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 143 transitions. [2021-02-19 17:45:55,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:45:55,195 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:55,195 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:55,409 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:45:55,409 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:55,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:55,410 INFO L82 PathProgramCache]: Analyzing trace with hash -623455110, now seen corresponding path program 41 times [2021-02-19 17:45:55,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:55,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372893235] [2021-02-19 17:45:55,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:55,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:55,537 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:55,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372893235] [2021-02-19 17:45:55,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137917376] [2021-02-19 17:45:55,537 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) [2021-02-19 17:45:55,561 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:45:55,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:45:55,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:45:55,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:45:55,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:55,677 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 27 treesize of output 21 [2021-02-19 17:45:55,680 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:55,685 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:55,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:55,687 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 10 treesize of output 6 [2021-02-19 17:45:55,689 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:45:55,694 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:55,695 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:45:55,695 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-02-19 17:45:55,728 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:55,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:45:55,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-02-19 17:45:55,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275910960] [2021-02-19 17:45:55,728 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:45:55,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:45:55,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:45:55,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:45:55,729 INFO L87 Difference]: Start difference. First operand 70 states and 143 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) [2021-02-19 17:45:56,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:45:56,015 INFO L93 Difference]: Finished difference Result 90 states and 182 transitions. [2021-02-19 17:45:56,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:45:56,016 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 [2021-02-19 17:45:56,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:45:56,016 INFO L225 Difference]: With dead ends: 90 [2021-02-19 17:45:56,016 INFO L226 Difference]: Without dead ends: 83 [2021-02-19 17:45:56,016 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:45:56,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-02-19 17:45:56,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 74. [2021-02-19 17:45:56,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.0821917808219177) internal successors, (152), 73 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) [2021-02-19 17:45:56,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 152 transitions. [2021-02-19 17:45:56,018 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 152 transitions. Word has length 16 [2021-02-19 17:45:56,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:45:56,018 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 152 transitions. [2021-02-19 17:45:56,018 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) [2021-02-19 17:45:56,018 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 152 transitions. [2021-02-19 17:45:56,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:45:56,018 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:56,018 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:56,218 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:45:56,219 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:56,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:56,219 INFO L82 PathProgramCache]: Analyzing trace with hash -231972336, now seen corresponding path program 42 times [2021-02-19 17:45:56,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:56,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570563444] [2021-02-19 17:45:56,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:56,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:56,376 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:56,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570563444] [2021-02-19 17:45:56,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535026972] [2021-02-19 17:45:56,376 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) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:45:56,400 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:45:56,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:45:56,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:45:56,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:45:56,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:56,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:45:56,490 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:56,510 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:56,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:56,513 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 10 treesize of output 6 [2021-02-19 17:45:56,514 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:45:56,533 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:56,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:56,536 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 19 treesize of output 15 [2021-02-19 17:45:56,538 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:56,556 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:56,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:56,559 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 [2021-02-19 17:45:56,560 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:45:56,576 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:56,577 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:45:56,578 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:35 [2021-02-19 17:45:56,644 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:56,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:45:56,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-02-19 17:45:56,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825739590] [2021-02-19 17:45:56,645 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:45:56,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:45:56,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:45:56,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:45:56,645 INFO L87 Difference]: Start difference. First operand 74 states and 152 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) [2021-02-19 17:45:57,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:45:57,067 INFO L93 Difference]: Finished difference Result 116 states and 222 transitions. [2021-02-19 17:45:57,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:45:57,068 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 [2021-02-19 17:45:57,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:45:57,068 INFO L225 Difference]: With dead ends: 116 [2021-02-19 17:45:57,068 INFO L226 Difference]: Without dead ends: 100 [2021-02-19 17:45:57,068 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:45:57,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-02-19 17:45:57,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 73. [2021-02-19 17:45:57,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.0694444444444446) internal successors, (149), 72 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:57,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 149 transitions. [2021-02-19 17:45:57,070 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 149 transitions. Word has length 16 [2021-02-19 17:45:57,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:45:57,070 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 149 transitions. [2021-02-19 17:45:57,070 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) [2021-02-19 17:45:57,070 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 149 transitions. [2021-02-19 17:45:57,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:45:57,070 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:57,070 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:57,285 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:45:57,285 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:57,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:57,285 INFO L82 PathProgramCache]: Analyzing trace with hash -767202138, now seen corresponding path program 43 times [2021-02-19 17:45:57,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:57,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991126264] [2021-02-19 17:45:57,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:57,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:57,392 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:57,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991126264] [2021-02-19 17:45:57,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192564626] [2021-02-19 17:45:57,393 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 [2021-02-19 17:45:57,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:57,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:45:57,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:45:57,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:57,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:57,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:45:57,458 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:57,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:57,460 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 19 treesize of output 15 [2021-02-19 17:45:57,461 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:57,482 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:57,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:57,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:57,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:45:57,486 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:45:57,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:57,488 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 10 treesize of output 6 [2021-02-19 17:45:57,490 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:45:57,508 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:57,509 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:45:57,509 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-02-19 17:45:57,586 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:57,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:45:57,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-02-19 17:45:57,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856164848] [2021-02-19 17:45:57,586 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:45:57,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:45:57,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:45:57,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:45:57,587 INFO L87 Difference]: Start difference. First operand 73 states and 149 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) [2021-02-19 17:45:58,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:45:58,133 INFO L93 Difference]: Finished difference Result 139 states and 266 transitions. [2021-02-19 17:45:58,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:45:58,134 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 [2021-02-19 17:45:58,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:45:58,134 INFO L225 Difference]: With dead ends: 139 [2021-02-19 17:45:58,134 INFO L226 Difference]: Without dead ends: 116 [2021-02-19 17:45:58,134 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:45:58,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-02-19 17:45:58,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 76. [2021-02-19 17:45:58,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.12) internal successors, (159), 75 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:58,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 159 transitions. [2021-02-19 17:45:58,136 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 159 transitions. Word has length 16 [2021-02-19 17:45:58,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:45:58,136 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 159 transitions. [2021-02-19 17:45:58,136 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) [2021-02-19 17:45:58,136 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 159 transitions. [2021-02-19 17:45:58,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:45:58,136 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:58,136 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:58,350 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-02-19 17:45:58,351 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:58,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:58,351 INFO L82 PathProgramCache]: Analyzing trace with hash -1729721716, now seen corresponding path program 44 times [2021-02-19 17:45:58,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:58,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663166366] [2021-02-19 17:45:58,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:58,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:58,474 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:58,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663166366] [2021-02-19 17:45:58,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743410677] [2021-02-19 17:45:58,475 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 [2021-02-19 17:45:58,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:45:58,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:45:58,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:45:58,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:45:58,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:58,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:45:58,625 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:58,631 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:58,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:58,633 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 10 treesize of output 6 [2021-02-19 17:45:58,634 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:45:58,639 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:58,641 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:45:58,641 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:32, output treesize:13 [2021-02-19 17:45:58,674 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:58,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:45:58,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-02-19 17:45:58,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963695015] [2021-02-19 17:45:58,675 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:45:58,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:45:58,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:45:58,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:45:58,675 INFO L87 Difference]: Start difference. First operand 76 states and 159 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) [2021-02-19 17:45:58,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:45:58,793 INFO L93 Difference]: Finished difference Result 95 states and 191 transitions. [2021-02-19 17:45:58,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:45:58,794 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 [2021-02-19 17:45:58,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:45:58,794 INFO L225 Difference]: With dead ends: 95 [2021-02-19 17:45:58,794 INFO L226 Difference]: Without dead ends: 88 [2021-02-19 17:45:58,794 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:45:58,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-02-19 17:45:58,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 77. [2021-02-19 17:45:58,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.1315789473684212) internal successors, (162), 76 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:58,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 162 transitions. [2021-02-19 17:45:58,796 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 162 transitions. Word has length 16 [2021-02-19 17:45:58,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:45:58,796 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 162 transitions. [2021-02-19 17:45:58,796 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) [2021-02-19 17:45:58,796 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 162 transitions. [2021-02-19 17:45:58,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:45:58,796 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:58,796 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:59,010 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-02-19 17:45:59,010 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:59,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:59,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1816309686, now seen corresponding path program 45 times [2021-02-19 17:45:59,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:59,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933833252] [2021-02-19 17:45:59,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:59,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:59,165 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:59,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933833252] [2021-02-19 17:45:59,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633284356] [2021-02-19 17:45:59,165 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) [2021-02-19 17:45:59,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 17:45:59,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:45:59,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:45:59,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:45:59,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:59,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:45:59,345 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:59,351 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:59,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:59,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:45:59,356 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:59,361 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:59,362 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:45:59,362 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-02-19 17:45:59,398 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:59,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:45:59,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-02-19 17:45:59,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823751822] [2021-02-19 17:45:59,398 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:45:59,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:45:59,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:45:59,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:45:59,399 INFO L87 Difference]: Start difference. First operand 77 states and 162 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) [2021-02-19 17:45:59,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:45:59,637 INFO L93 Difference]: Finished difference Result 105 states and 213 transitions. [2021-02-19 17:45:59,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:45:59,637 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 [2021-02-19 17:45:59,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:45:59,637 INFO L225 Difference]: With dead ends: 105 [2021-02-19 17:45:59,637 INFO L226 Difference]: Without dead ends: 98 [2021-02-19 17:45:59,638 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:45:59,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-02-19 17:45:59,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 78. [2021-02-19 17:45:59,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.142857142857143) internal successors, (165), 77 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) [2021-02-19 17:45:59,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 165 transitions. [2021-02-19 17:45:59,639 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 165 transitions. Word has length 16 [2021-02-19 17:45:59,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:45:59,639 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 165 transitions. [2021-02-19 17:45:59,639 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) [2021-02-19 17:45:59,639 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 165 transitions. [2021-02-19 17:45:59,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:45:59,639 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:59,639 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:59,853 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2021-02-19 17:45:59,854 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:59,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:59,854 INFO L82 PathProgramCache]: Analyzing trace with hash -2087174836, now seen corresponding path program 46 times [2021-02-19 17:45:59,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:59,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496789247] [2021-02-19 17:45:59,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:59,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:00,021 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:00,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496789247] [2021-02-19 17:46:00,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480088535] [2021-02-19 17:46:00,022 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 [2021-02-19 17:46:00,041 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:46:00,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:00,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:00,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:00,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:00,177 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 [2021-02-19 17:46:00,178 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:00,200 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:00,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:00,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:46:00,206 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:46:00,229 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:00,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:00,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:46:00,235 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:00,256 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:00,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:00,259 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 [2021-02-19 17:46:00,260 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:46:00,278 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:00,280 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:00,280 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:35 [2021-02-19 17:46:00,348 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:00,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:00,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-02-19 17:46:00,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161761060] [2021-02-19 17:46:00,348 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:46:00,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:00,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:46:00,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:46:00,349 INFO L87 Difference]: Start difference. First operand 78 states and 165 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) [2021-02-19 17:46:00,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:00,723 INFO L93 Difference]: Finished difference Result 125 states and 243 transitions. [2021-02-19 17:46:00,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:46:00,723 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 [2021-02-19 17:46:00,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:00,724 INFO L225 Difference]: With dead ends: 125 [2021-02-19 17:46:00,724 INFO L226 Difference]: Without dead ends: 109 [2021-02-19 17:46:00,724 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:46:00,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-02-19 17:46:00,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 75. [2021-02-19 17:46:00,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.1216216216216215) internal successors, (157), 74 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:00,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 157 transitions. [2021-02-19 17:46:00,725 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 157 transitions. Word has length 16 [2021-02-19 17:46:00,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:00,725 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 157 transitions. [2021-02-19 17:46:00,725 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) [2021-02-19 17:46:00,725 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 157 transitions. [2021-02-19 17:46:00,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:46:00,726 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:00,726 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:00,940 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable208 [2021-02-19 17:46:00,940 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:00,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:00,941 INFO L82 PathProgramCache]: Analyzing trace with hash -850676490, now seen corresponding path program 47 times [2021-02-19 17:46:00,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:00,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797219684] [2021-02-19 17:46:00,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:00,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:01,064 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:01,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797219684] [2021-02-19 17:46:01,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790483546] [2021-02-19 17:46:01,064 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) [2021-02-19 17:46:01,086 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:46:01,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:01,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:01,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:01,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:01,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:46:01,211 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:01,217 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:01,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:01,218 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 10 treesize of output 6 [2021-02-19 17:46:01,219 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:46:01,225 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:01,225 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:46:01,225 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-02-19 17:46:01,256 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:01,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:01,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-02-19 17:46:01,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102504476] [2021-02-19 17:46:01,256 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:46:01,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:01,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:46:01,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:46:01,260 INFO L87 Difference]: Start difference. First operand 75 states and 157 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) [2021-02-19 17:46:01,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:01,471 INFO L93 Difference]: Finished difference Result 97 states and 199 transitions. [2021-02-19 17:46:01,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:46:01,472 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 [2021-02-19 17:46:01,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:01,472 INFO L225 Difference]: With dead ends: 97 [2021-02-19 17:46:01,472 INFO L226 Difference]: Without dead ends: 90 [2021-02-19 17:46:01,472 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:46:01,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-02-19 17:46:01,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 78. [2021-02-19 17:46:01,473 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) [2021-02-19 17:46:01,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 164 transitions. [2021-02-19 17:46:01,473 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 164 transitions. Word has length 16 [2021-02-19 17:46:01,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:01,474 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 164 transitions. [2021-02-19 17:46:01,474 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) [2021-02-19 17:46:01,474 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 164 transitions. [2021-02-19 17:46:01,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:46:01,474 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:01,474 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:01,674 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-02-19 17:46:01,674 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:01,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:01,675 INFO L82 PathProgramCache]: Analyzing trace with hash -459193716, now seen corresponding path program 48 times [2021-02-19 17:46:01,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:01,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572623033] [2021-02-19 17:46:01,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:01,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:01,770 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:01,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572623033] [2021-02-19 17:46:01,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411598898] [2021-02-19 17:46:01,770 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 [2021-02-19 17:46:01,786 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:46:01,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:01,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:01,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:01,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:01,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:01,846 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 19 treesize of output 15 [2021-02-19 17:46:01,847 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:01,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:01,849 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 19 treesize of output 15 [2021-02-19 17:46:01,850 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:01,870 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:01,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:01,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:01,872 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 10 treesize of output 6 [2021-02-19 17:46:01,874 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:46:01,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:01,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:46:01,878 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:46:01,897 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:01,898 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:01,898 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-02-19 17:46:01,969 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:01,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:01,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-02-19 17:46:01,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126662278] [2021-02-19 17:46:01,969 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:46:01,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:01,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:46:01,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:46:01,970 INFO L87 Difference]: Start difference. First operand 78 states and 164 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) [2021-02-19 17:46:02,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:02,103 INFO L93 Difference]: Finished difference Result 101 states and 206 transitions. [2021-02-19 17:46:02,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:46:02,103 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 [2021-02-19 17:46:02,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:02,104 INFO L225 Difference]: With dead ends: 101 [2021-02-19 17:46:02,104 INFO L226 Difference]: Without dead ends: 94 [2021-02-19 17:46:02,104 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:46:02,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-02-19 17:46:02,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 79. [2021-02-19 17:46:02,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.1538461538461537) internal successors, (168), 78 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) [2021-02-19 17:46:02,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 168 transitions. [2021-02-19 17:46:02,105 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 168 transitions. Word has length 16 [2021-02-19 17:46:02,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:02,106 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 168 transitions. [2021-02-19 17:46:02,106 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) [2021-02-19 17:46:02,106 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 168 transitions. [2021-02-19 17:46:02,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:46:02,106 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:02,106 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:02,321 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2021-02-19 17:46:02,321 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:02,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:02,321 INFO L82 PathProgramCache]: Analyzing trace with hash -994423518, now seen corresponding path program 49 times [2021-02-19 17:46:02,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:02,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721263172] [2021-02-19 17:46:02,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:02,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:02,486 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:02,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721263172] [2021-02-19 17:46:02,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019568211] [2021-02-19 17:46:02,487 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 [2021-02-19 17:46:02,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:02,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:02,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:02,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:02,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:02,584 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 19 treesize of output 15 [2021-02-19 17:46:02,585 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:02,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:02,588 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 19 treesize of output 15 [2021-02-19 17:46:02,589 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:02,614 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:02,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:02,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:02,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:46:02,618 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:46:02,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:02,621 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 10 treesize of output 6 [2021-02-19 17:46:02,622 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:46:02,643 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:02,644 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:02,645 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-02-19 17:46:02,715 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:02,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:02,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-02-19 17:46:02,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019631312] [2021-02-19 17:46:02,716 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:46:02,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:02,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:46:02,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:46:02,717 INFO L87 Difference]: Start difference. First operand 79 states and 168 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) [2021-02-19 17:46:03,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:03,261 INFO L93 Difference]: Finished difference Result 145 states and 284 transitions. [2021-02-19 17:46:03,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:46:03,261 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 [2021-02-19 17:46:03,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:03,262 INFO L225 Difference]: With dead ends: 145 [2021-02-19 17:46:03,262 INFO L226 Difference]: Without dead ends: 122 [2021-02-19 17:46:03,262 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:46:03,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-02-19 17:46:03,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 79. [2021-02-19 17:46:03,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.1538461538461537) internal successors, (168), 78 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) [2021-02-19 17:46:03,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 168 transitions. [2021-02-19 17:46:03,263 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 168 transitions. Word has length 16 [2021-02-19 17:46:03,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:03,264 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 168 transitions. [2021-02-19 17:46:03,264 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) [2021-02-19 17:46:03,264 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 168 transitions. [2021-02-19 17:46:03,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:46:03,264 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:03,264 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:03,475 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2021-02-19 17:46:03,475 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:03,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:03,476 INFO L82 PathProgramCache]: Analyzing trace with hash -406678196, now seen corresponding path program 50 times [2021-02-19 17:46:03,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:03,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659006732] [2021-02-19 17:46:03,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:03,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:03,618 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:03,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659006732] [2021-02-19 17:46:03,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199380991] [2021-02-19 17:46:03,619 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) [2021-02-19 17:46:03,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:46:03,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:03,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:03,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:03,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:03,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:03,705 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 19 treesize of output 15 [2021-02-19 17:46:03,706 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:03,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:03,709 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 19 treesize of output 15 [2021-02-19 17:46:03,709 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:03,730 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:03,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:03,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:03,733 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 13 treesize of output 9 [2021-02-19 17:46:03,734 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:46:03,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:03,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:46:03,738 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:46:03,757 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:03,757 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:03,758 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-02-19 17:46:03,825 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:03,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:03,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-02-19 17:46:03,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138299004] [2021-02-19 17:46:03,825 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:46:03,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:03,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:46:03,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:46:03,825 INFO L87 Difference]: Start difference. First operand 79 states and 168 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) [2021-02-19 17:46:03,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:03,977 INFO L93 Difference]: Finished difference Result 100 states and 208 transitions. [2021-02-19 17:46:03,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:46:03,978 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 [2021-02-19 17:46:03,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:03,978 INFO L225 Difference]: With dead ends: 100 [2021-02-19 17:46:03,978 INFO L226 Difference]: Without dead ends: 93 [2021-02-19 17:46:03,978 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:46:03,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-02-19 17:46:03,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 83. [2021-02-19 17:46:03,979 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) [2021-02-19 17:46:03,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 177 transitions. [2021-02-19 17:46:03,980 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 177 transitions. Word has length 16 [2021-02-19 17:46:03,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:03,980 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 177 transitions. [2021-02-19 17:46:03,980 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) [2021-02-19 17:46:03,980 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 177 transitions. [2021-02-19 17:46:03,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:46:03,980 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:03,980 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:04,194 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:04,194 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:04,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:04,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1716623108, now seen corresponding path program 51 times [2021-02-19 17:46:04,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:04,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396273733] [2021-02-19 17:46:04,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:04,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:04,313 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:04,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396273733] [2021-02-19 17:46:04,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135898667] [2021-02-19 17:46:04,313 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) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:04,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 17:46:04,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:04,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:04,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:04,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:04,419 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 27 treesize of output 21 [2021-02-19 17:46:04,420 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:04,427 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:04,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:04,429 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 10 treesize of output 6 [2021-02-19 17:46:04,431 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:46:04,437 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:04,438 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:46:04,438 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:13 [2021-02-19 17:46:04,469 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:04,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:04,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-02-19 17:46:04,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569581046] [2021-02-19 17:46:04,469 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:46:04,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:04,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:46:04,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:46:04,470 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) [2021-02-19 17:46:04,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:04,584 INFO L93 Difference]: Finished difference Result 103 states and 211 transitions. [2021-02-19 17:46:04,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:46:04,584 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 [2021-02-19 17:46:04,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:04,585 INFO L225 Difference]: With dead ends: 103 [2021-02-19 17:46:04,585 INFO L226 Difference]: Without dead ends: 96 [2021-02-19 17:46:04,585 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:46:04,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-02-19 17:46:04,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 84. [2021-02-19 17:46:04,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.1686746987951806) internal successors, (180), 83 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) [2021-02-19 17:46:04,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 180 transitions. [2021-02-19 17:46:04,586 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 180 transitions. Word has length 16 [2021-02-19 17:46:04,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:04,587 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 180 transitions. [2021-02-19 17:46:04,587 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) [2021-02-19 17:46:04,587 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 180 transitions. [2021-02-19 17:46:04,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:46:04,587 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:04,587 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:04,801 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2021-02-19 17:46:04,801 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:04,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:04,801 INFO L82 PathProgramCache]: Analyzing trace with hash 967687214, now seen corresponding path program 52 times [2021-02-19 17:46:04,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:04,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358440377] [2021-02-19 17:46:04,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:04,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:04,950 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:04,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358440377] [2021-02-19 17:46:04,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388095849] [2021-02-19 17:46:04,951 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 [2021-02-19 17:46:04,968 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:46:04,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:04,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:04,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:05,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:05,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:46:05,073 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:05,079 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:05,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:05,081 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 10 treesize of output 6 [2021-02-19 17:46:05,082 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:46:05,087 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:05,088 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:46:05,088 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:13 [2021-02-19 17:46:05,120 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:05,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:05,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-02-19 17:46:05,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892693594] [2021-02-19 17:46:05,121 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:46:05,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:05,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:46:05,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:46:05,121 INFO L87 Difference]: Start difference. First operand 84 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) [2021-02-19 17:46:05,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:05,364 INFO L93 Difference]: Finished difference Result 113 states and 233 transitions. [2021-02-19 17:46:05,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:46:05,364 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 [2021-02-19 17:46:05,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:05,365 INFO L225 Difference]: With dead ends: 113 [2021-02-19 17:46:05,365 INFO L226 Difference]: Without dead ends: 106 [2021-02-19 17:46:05,365 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:46:05,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-02-19 17:46:05,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 85. [2021-02-19 17:46:05,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.1785714285714284) internal successors, (183), 84 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) [2021-02-19 17:46:05,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 183 transitions. [2021-02-19 17:46:05,366 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 183 transitions. Word has length 16 [2021-02-19 17:46:05,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:05,366 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 183 transitions. [2021-02-19 17:46:05,367 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) [2021-02-19 17:46:05,367 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 183 transitions. [2021-02-19 17:46:05,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:46:05,367 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:05,367 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:05,567 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:05,567 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:05,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:05,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1359169988, now seen corresponding path program 53 times [2021-02-19 17:46:05,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:05,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192298689] [2021-02-19 17:46:05,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:05,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:05,725 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:05,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192298689] [2021-02-19 17:46:05,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736766579] [2021-02-19 17:46:05,727 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 [2021-02-19 17:46:05,745 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:46:05,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:05,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:05,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:05,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:05,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:05,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:46:05,835 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:05,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:05,837 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 19 treesize of output 15 [2021-02-19 17:46:05,838 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:05,858 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:05,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:05,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:05,861 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 [2021-02-19 17:46:05,863 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:46:05,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:05,865 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 10 treesize of output 6 [2021-02-19 17:46:05,866 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:46:05,885 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:05,886 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:05,886 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-02-19 17:46:05,950 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:05,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:05,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-02-19 17:46:05,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958586948] [2021-02-19 17:46:05,950 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:46:05,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:05,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:46:05,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:46:05,951 INFO L87 Difference]: Start difference. First operand 85 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) [2021-02-19 17:46:06,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:06,328 INFO L93 Difference]: Finished difference Result 133 states and 263 transitions. [2021-02-19 17:46:06,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:46:06,329 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 [2021-02-19 17:46:06,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:06,329 INFO L225 Difference]: With dead ends: 133 [2021-02-19 17:46:06,329 INFO L226 Difference]: Without dead ends: 117 [2021-02-19 17:46:06,329 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:46:06,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-02-19 17:46:06,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 83. [2021-02-19 17:46:06,332 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) [2021-02-19 17:46:06,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 177 transitions. [2021-02-19 17:46:06,332 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 177 transitions. Word has length 16 [2021-02-19 17:46:06,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:06,332 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 177 transitions. [2021-02-19 17:46:06,337 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) [2021-02-19 17:46:06,337 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 177 transitions. [2021-02-19 17:46:06,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:46:06,337 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:06,337 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:06,544 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:06,545 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:06,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:06,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1555432536, now seen corresponding path program 54 times [2021-02-19 17:46:06,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:06,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680466407] [2021-02-19 17:46:06,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:06,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:06,655 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:06,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680466407] [2021-02-19 17:46:06,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991693525] [2021-02-19 17:46:06,655 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 [2021-02-19 17:46:06,671 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-02-19 17:46:06,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:06,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:06,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:06,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:06,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:46:06,757 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:06,763 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:06,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:06,765 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 21 treesize of output 13 [2021-02-19 17:46:06,766 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:06,771 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:06,772 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:46:06,772 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:13 [2021-02-19 17:46:06,801 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:06,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:06,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-02-19 17:46:06,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560103725] [2021-02-19 17:46:06,801 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:46:06,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:06,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:46:06,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:46:06,801 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) [2021-02-19 17:46:06,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:06,969 INFO L93 Difference]: Finished difference Result 101 states and 208 transitions. [2021-02-19 17:46:06,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:46:06,969 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 [2021-02-19 17:46:06,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:06,970 INFO L225 Difference]: With dead ends: 101 [2021-02-19 17:46:06,970 INFO L226 Difference]: Without dead ends: 94 [2021-02-19 17:46:06,970 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:46:06,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-02-19 17:46:06,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 85. [2021-02-19 17:46:06,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.1666666666666665) internal successors, (182), 84 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) [2021-02-19 17:46:06,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 182 transitions. [2021-02-19 17:46:06,971 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 182 transitions. Word has length 16 [2021-02-19 17:46:06,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:06,971 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 182 transitions. [2021-02-19 17:46:06,971 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) [2021-02-19 17:46:06,971 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 182 transitions. [2021-02-19 17:46:06,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:46:06,972 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:06,972 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:07,172 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2021-02-19 17:46:07,172 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:07,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:07,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1946915310, now seen corresponding path program 55 times [2021-02-19 17:46:07,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:07,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610012996] [2021-02-19 17:46:07,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:07,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:07,361 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:07,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610012996] [2021-02-19 17:46:07,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294624852] [2021-02-19 17:46:07,361 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:46:07,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:07,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:07,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:07,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:07,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:07,455 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 19 treesize of output 15 [2021-02-19 17:46:07,456 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:07,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:07,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:46:07,459 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:07,479 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:07,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:07,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:07,482 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 13 treesize of output 9 [2021-02-19 17:46:07,484 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:46:07,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:07,486 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 [2021-02-19 17:46:07,488 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:46:07,506 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:07,507 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:07,507 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-02-19 17:46:07,582 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:07,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:07,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-02-19 17:46:07,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299251756] [2021-02-19 17:46:07,583 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:46:07,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:07,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:46:07,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:46:07,583 INFO L87 Difference]: Start difference. First operand 85 states and 182 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) [2021-02-19 17:46:07,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:07,952 INFO L93 Difference]: Finished difference Result 129 states and 255 transitions. [2021-02-19 17:46:07,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:46:07,952 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 [2021-02-19 17:46:07,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:07,952 INFO L225 Difference]: With dead ends: 129 [2021-02-19 17:46:07,953 INFO L226 Difference]: Without dead ends: 113 [2021-02-19 17:46:07,953 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:46:07,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-02-19 17:46:07,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 84. [2021-02-19 17:46:07,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.1566265060240966) internal successors, (179), 83 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) [2021-02-19 17:46:07,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 179 transitions. [2021-02-19 17:46:07,954 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 179 transitions. Word has length 16 [2021-02-19 17:46:07,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:07,954 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 179 transitions. [2021-02-19 17:46:07,954 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) [2021-02-19 17:46:07,954 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 179 transitions. [2021-02-19 17:46:07,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:46:07,954 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:07,954 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:08,155 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2021-02-19 17:46:08,155 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:08,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:08,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1411685508, now seen corresponding path program 56 times [2021-02-19 17:46:08,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:08,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476999637] [2021-02-19 17:46:08,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:08,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:08,270 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:08,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476999637] [2021-02-19 17:46:08,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264727872] [2021-02-19 17:46:08,271 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 [2021-02-19 17:46:08,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:46:08,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:08,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:08,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:08,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:08,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:08,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:46:08,352 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:08,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:08,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:46:08,355 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:08,377 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:08,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:08,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:08,380 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 10 treesize of output 6 [2021-02-19 17:46:08,381 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:46:08,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:08,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:46:08,385 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:46:08,405 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:08,406 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:08,406 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-02-19 17:46:08,468 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:08,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:08,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-02-19 17:46:08,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249771575] [2021-02-19 17:46:08,469 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:46:08,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:08,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:46:08,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:46:08,469 INFO L87 Difference]: Start difference. First operand 84 states and 179 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) [2021-02-19 17:46:08,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:08,943 INFO L93 Difference]: Finished difference Result 153 states and 301 transitions. [2021-02-19 17:46:08,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:46:08,944 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 [2021-02-19 17:46:08,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:08,944 INFO L225 Difference]: With dead ends: 153 [2021-02-19 17:46:08,944 INFO L226 Difference]: Without dead ends: 130 [2021-02-19 17:46:08,944 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:46:08,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-02-19 17:46:08,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 82. [2021-02-19 17:46:08,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.1604938271604937) internal successors, (175), 81 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) [2021-02-19 17:46:08,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 175 transitions. [2021-02-19 17:46:08,946 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 175 transitions. Word has length 16 [2021-02-19 17:46:08,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:08,946 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 175 transitions. [2021-02-19 17:46:08,946 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) [2021-02-19 17:46:08,946 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 175 transitions. [2021-02-19 17:46:08,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:46:08,946 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:08,946 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:09,158 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2021-02-19 17:46:09,159 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:09,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:09,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1699298962, now seen corresponding path program 57 times [2021-02-19 17:46:09,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:09,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551467617] [2021-02-19 17:46:09,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:09,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:09,300 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:09,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551467617] [2021-02-19 17:46:09,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976367541] [2021-02-19 17:46:09,300 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 [2021-02-19 17:46:09,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:46:09,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:09,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:09,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:09,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:09,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:46:09,406 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:09,412 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:09,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:09,413 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 21 treesize of output 13 [2021-02-19 17:46:09,414 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:09,419 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:09,420 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:46:09,420 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:13 [2021-02-19 17:46:09,452 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:09,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:09,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-02-19 17:46:09,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996946887] [2021-02-19 17:46:09,453 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:46:09,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:09,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:46:09,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:46:09,453 INFO L87 Difference]: Start difference. First operand 82 states and 175 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) [2021-02-19 17:46:09,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:09,707 INFO L93 Difference]: Finished difference Result 105 states and 219 transitions. [2021-02-19 17:46:09,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:46:09,707 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 [2021-02-19 17:46:09,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:09,708 INFO L225 Difference]: With dead ends: 105 [2021-02-19 17:46:09,708 INFO L226 Difference]: Without dead ends: 98 [2021-02-19 17:46:09,708 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:46:09,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-02-19 17:46:09,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 85. [2021-02-19 17:46:09,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.1666666666666665) internal successors, (182), 84 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) [2021-02-19 17:46:09,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 182 transitions. [2021-02-19 17:46:09,709 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 182 transitions. Word has length 16 [2021-02-19 17:46:09,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:09,709 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 182 transitions. [2021-02-19 17:46:09,709 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) [2021-02-19 17:46:09,709 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 182 transitions. [2021-02-19 17:46:09,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:46:09,710 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:09,710 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:09,924 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:09,924 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:09,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:09,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1307816188, now seen corresponding path program 58 times [2021-02-19 17:46:09,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:09,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201076735] [2021-02-19 17:46:09,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:09,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:10,082 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:10,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201076735] [2021-02-19 17:46:10,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233598941] [2021-02-19 17:46:10,082 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 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 [2021-02-19 17:46:10,097 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:46:10,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:10,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:10,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:10,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:10,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:10,166 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 [2021-02-19 17:46:10,167 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:10,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:10,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:46:10,169 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:10,189 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:10,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:10,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:10,192 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 10 treesize of output 6 [2021-02-19 17:46:10,193 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:46:10,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:10,195 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 13 treesize of output 9 [2021-02-19 17:46:10,196 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:46:10,215 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:10,216 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:10,216 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-02-19 17:46:10,275 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:10,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:10,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-02-19 17:46:10,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935991576] [2021-02-19 17:46:10,275 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:46:10,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:10,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:46:10,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:46:10,276 INFO L87 Difference]: Start difference. First operand 85 states and 182 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) [2021-02-19 17:46:10,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:10,480 INFO L93 Difference]: Finished difference Result 109 states and 226 transitions. [2021-02-19 17:46:10,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:46:10,481 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 [2021-02-19 17:46:10,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:10,481 INFO L225 Difference]: With dead ends: 109 [2021-02-19 17:46:10,481 INFO L226 Difference]: Without dead ends: 102 [2021-02-19 17:46:10,481 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:46:10,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-02-19 17:46:10,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 84. [2021-02-19 17:46:10,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.1566265060240966) internal successors, (179), 83 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) [2021-02-19 17:46:10,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 179 transitions. [2021-02-19 17:46:10,483 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 179 transitions. Word has length 16 [2021-02-19 17:46:10,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:10,483 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 179 transitions. [2021-02-19 17:46:10,483 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) [2021-02-19 17:46:10,483 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 179 transitions. [2021-02-19 17:46:10,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:46:10,483 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:10,483 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:10,697 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable241 [2021-02-19 17:46:10,698 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:10,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:10,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1843045990, now seen corresponding path program 59 times [2021-02-19 17:46:10,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:10,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941930913] [2021-02-19 17:46:10,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:10,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:10,837 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:10,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941930913] [2021-02-19 17:46:10,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29765756] [2021-02-19 17:46:10,837 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 [2021-02-19 17:46:10,853 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:46:10,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:10,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:10,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:10,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:10,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:10,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:46:10,928 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:10,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:10,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:46:10,931 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:10,951 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:10,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:10,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:10,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:46:10,954 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:46:10,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:10,957 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 13 treesize of output 9 [2021-02-19 17:46:10,958 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:46:10,976 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:10,977 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:10,977 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-02-19 17:46:11,046 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:11,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:11,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-02-19 17:46:11,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211032525] [2021-02-19 17:46:11,047 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:46:11,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:11,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:46:11,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:46:11,047 INFO L87 Difference]: Start difference. First operand 84 states and 179 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) [2021-02-19 17:46:11,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:11,510 INFO L93 Difference]: Finished difference Result 151 states and 297 transitions. [2021-02-19 17:46:11,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:46:11,510 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 [2021-02-19 17:46:11,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:11,511 INFO L225 Difference]: With dead ends: 151 [2021-02-19 17:46:11,511 INFO L226 Difference]: Without dead ends: 128 [2021-02-19 17:46:11,511 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:46:11,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-02-19 17:46:11,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 83. [2021-02-19 17:46:11,512 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) [2021-02-19 17:46:11,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 177 transitions. [2021-02-19 17:46:11,513 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 177 transitions. Word has length 16 [2021-02-19 17:46:11,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:11,513 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 177 transitions. [2021-02-19 17:46:11,513 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) [2021-02-19 17:46:11,513 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 177 transitions. [2021-02-19 17:46:11,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:46:11,513 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:11,513 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:11,727 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2021-02-19 17:46:11,727 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:11,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:11,728 INFO L82 PathProgramCache]: Analyzing trace with hash -1255300668, now seen corresponding path program 60 times [2021-02-19 17:46:11,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:11,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714178095] [2021-02-19 17:46:11,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:11,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:11,906 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:11,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714178095] [2021-02-19 17:46:11,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016123453] [2021-02-19 17:46:11,906 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 [2021-02-19 17:46:11,923 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:46:11,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:11,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:11,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:12,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:12,050 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 [2021-02-19 17:46:12,054 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:12,077 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:12,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:12,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:46:12,081 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:46:12,103 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:12,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:12,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:46:12,107 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:12,127 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:12,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:12,129 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 [2021-02-19 17:46:12,131 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:46:12,147 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:12,149 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:12,149 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:35 [2021-02-19 17:46:12,247 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:12,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:12,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-02-19 17:46:12,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113157425] [2021-02-19 17:46:12,247 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:46:12,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:12,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:46:12,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:46:12,248 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) [2021-02-19 17:46:12,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:12,535 INFO L93 Difference]: Finished difference Result 115 states and 234 transitions. [2021-02-19 17:46:12,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:46:12,536 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 [2021-02-19 17:46:12,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:12,536 INFO L225 Difference]: With dead ends: 115 [2021-02-19 17:46:12,536 INFO L226 Difference]: Without dead ends: 101 [2021-02-19 17:46:12,536 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:46:12,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-02-19 17:46:12,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 81. [2021-02-19 17:46:12,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.1625) internal successors, (173), 80 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) [2021-02-19 17:46:12,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 173 transitions. [2021-02-19 17:46:12,537 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 173 transitions. Word has length 16 [2021-02-19 17:46:12,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:12,538 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 173 transitions. [2021-02-19 17:46:12,538 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) [2021-02-19 17:46:12,538 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 173 transitions. [2021-02-19 17:46:12,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:46:12,538 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:12,538 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:12,752 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable247 [2021-02-19 17:46:12,752 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:12,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:12,752 INFO L82 PathProgramCache]: Analyzing trace with hash 60753978, now seen corresponding path program 61 times [2021-02-19 17:46:12,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:12,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122760456] [2021-02-19 17:46:12,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:12,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:12,895 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:12,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122760456] [2021-02-19 17:46:12,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598161324] [2021-02-19 17:46:12,895 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) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:12,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:12,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:12,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:12,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:12,989 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 27 treesize of output 21 [2021-02-19 17:46:12,990 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:12,996 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:12,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:12,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:46:12,998 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:13,003 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:13,004 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:46:13,004 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:13 [2021-02-19 17:46:13,035 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:13,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:13,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-02-19 17:46:13,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814079121] [2021-02-19 17:46:13,035 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:46:13,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:13,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:46:13,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:46:13,036 INFO L87 Difference]: Start difference. First operand 81 states and 173 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) [2021-02-19 17:46:13,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:13,286 INFO L93 Difference]: Finished difference Result 118 states and 244 transitions. [2021-02-19 17:46:13,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:46:13,286 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 [2021-02-19 17:46:13,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:13,287 INFO L225 Difference]: With dead ends: 118 [2021-02-19 17:46:13,287 INFO L226 Difference]: Without dead ends: 111 [2021-02-19 17:46:13,287 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:46:13,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-02-19 17:46:13,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 82. [2021-02-19 17:46:13,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.1728395061728394) internal successors, (176), 81 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) [2021-02-19 17:46:13,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 176 transitions. [2021-02-19 17:46:13,288 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 176 transitions. Word has length 16 [2021-02-19 17:46:13,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:13,288 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 176 transitions. [2021-02-19 17:46:13,288 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) [2021-02-19 17:46:13,288 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 176 transitions. [2021-02-19 17:46:13,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:46:13,288 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:13,288 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:13,497 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable254,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:13,498 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:13,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:13,498 INFO L82 PathProgramCache]: Analyzing trace with hash 452236752, now seen corresponding path program 62 times [2021-02-19 17:46:13,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:13,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897535260] [2021-02-19 17:46:13,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:13,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:13,633 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:13,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897535260] [2021-02-19 17:46:13,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891670124] [2021-02-19 17:46:13,634 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) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:13,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:46:13,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:13,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:13,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:13,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:13,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:13,705 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 19 treesize of output 15 [2021-02-19 17:46:13,706 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:13,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:13,708 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 [2021-02-19 17:46:13,709 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:13,733 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:13,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:13,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:13,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:46:13,737 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:46:13,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:13,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:46:13,740 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:46:13,759 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:13,760 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:13,760 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-02-19 17:46:13,836 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:13,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:13,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-02-19 17:46:13,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527666560] [2021-02-19 17:46:13,837 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:46:13,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:13,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:46:13,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:46:13,837 INFO L87 Difference]: Start difference. First operand 82 states and 176 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) [2021-02-19 17:46:14,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:14,109 INFO L93 Difference]: Finished difference Result 116 states and 241 transitions. [2021-02-19 17:46:14,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:46:14,109 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 [2021-02-19 17:46:14,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:14,109 INFO L225 Difference]: With dead ends: 116 [2021-02-19 17:46:14,109 INFO L226 Difference]: Without dead ends: 109 [2021-02-19 17:46:14,110 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:46:14,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-02-19 17:46:14,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 81. [2021-02-19 17:46:14,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.1625) internal successors, (173), 80 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) [2021-02-19 17:46:14,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 173 transitions. [2021-02-19 17:46:14,111 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 173 transitions. Word has length 16 [2021-02-19 17:46:14,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:14,111 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 173 transitions. [2021-02-19 17:46:14,111 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) [2021-02-19 17:46:14,111 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 173 transitions. [2021-02-19 17:46:14,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:46:14,111 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:14,111 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:14,325 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2021-02-19 17:46:14,326 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:14,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:14,326 INFO L82 PathProgramCache]: Analyzing trace with hash -82993050, now seen corresponding path program 63 times [2021-02-19 17:46:14,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:14,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470283227] [2021-02-19 17:46:14,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:14,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:14,509 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:14,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470283227] [2021-02-19 17:46:14,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051686160] [2021-02-19 17:46:14,509 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) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:14,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:46:14,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:14,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:14,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:14,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:14,609 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 19 treesize of output 15 [2021-02-19 17:46:14,610 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:14,630 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:14,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:14,633 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 19 treesize of output 15 [2021-02-19 17:46:14,634 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:14,652 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:14,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:14,655 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 10 treesize of output 6 [2021-02-19 17:46:14,656 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:46:14,675 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:14,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:14,677 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 13 treesize of output 9 [2021-02-19 17:46:14,679 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:46:14,696 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:14,698 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:14,698 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:35 [2021-02-19 17:46:14,791 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:14,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:14,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-02-19 17:46:14,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048964723] [2021-02-19 17:46:14,791 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:46:14,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:14,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:46:14,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:46:14,792 INFO L87 Difference]: Start difference. First operand 81 states and 173 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) [2021-02-19 17:46:15,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:15,032 INFO L93 Difference]: Finished difference Result 124 states and 250 transitions. [2021-02-19 17:46:15,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:46:15,032 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 [2021-02-19 17:46:15,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:15,032 INFO L225 Difference]: With dead ends: 124 [2021-02-19 17:46:15,033 INFO L226 Difference]: Without dead ends: 110 [2021-02-19 17:46:15,033 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:46:15,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-02-19 17:46:15,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 81. [2021-02-19 17:46:15,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.1625) internal successors, (173), 80 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) [2021-02-19 17:46:15,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 173 transitions. [2021-02-19 17:46:15,034 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 173 transitions. Word has length 16 [2021-02-19 17:46:15,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:15,034 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 173 transitions. [2021-02-19 17:46:15,034 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) [2021-02-19 17:46:15,034 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 173 transitions. [2021-02-19 17:46:15,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:46:15,034 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:15,034 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:15,249 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:15,249 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:15,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:15,249 INFO L82 PathProgramCache]: Analyzing trace with hash 504752272, now seen corresponding path program 64 times [2021-02-19 17:46:15,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:15,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140492694] [2021-02-19 17:46:15,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:15,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:15,395 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:15,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140492694] [2021-02-19 17:46:15,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764077968] [2021-02-19 17:46:15,395 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) [2021-02-19 17:46:15,428 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:46:15,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:15,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:15,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:15,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:15,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:15,495 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 19 treesize of output 15 [2021-02-19 17:46:15,496 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:15,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:15,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:46:15,500 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:15,525 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:15,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:15,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:15,528 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 10 treesize of output 6 [2021-02-19 17:46:15,530 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:46:15,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:15,532 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 10 treesize of output 6 [2021-02-19 17:46:15,534 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:46:15,555 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:15,556 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:15,556 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-02-19 17:46:15,624 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:15,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:15,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-02-19 17:46:15,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607765656] [2021-02-19 17:46:15,624 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:46:15,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:15,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:46:15,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:46:15,625 INFO L87 Difference]: Start difference. First operand 81 states and 173 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) [2021-02-19 17:46:15,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:15,800 INFO L93 Difference]: Finished difference Result 106 states and 220 transitions. [2021-02-19 17:46:15,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:46:15,800 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 [2021-02-19 17:46:15,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:15,800 INFO L225 Difference]: With dead ends: 106 [2021-02-19 17:46:15,800 INFO L226 Difference]: Without dead ends: 99 [2021-02-19 17:46:15,801 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:46:15,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-02-19 17:46:15,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 81. [2021-02-19 17:46:15,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.1625) internal successors, (173), 80 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) [2021-02-19 17:46:15,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 173 transitions. [2021-02-19 17:46:15,802 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 173 transitions. Word has length 16 [2021-02-19 17:46:15,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:15,802 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 173 transitions. [2021-02-19 17:46:15,802 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) [2021-02-19 17:46:15,802 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 173 transitions. [2021-02-19 17:46:15,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:46:15,802 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:15,802 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:16,003 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2021-02-19 17:46:16,003 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:16,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:16,003 INFO L82 PathProgramCache]: Analyzing trace with hash -823945148, now seen corresponding path program 65 times [2021-02-19 17:46:16,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:16,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131177981] [2021-02-19 17:46:16,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:16,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:16,183 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:16,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131177981] [2021-02-19 17:46:16,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474165862] [2021-02-19 17:46:16,183 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 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 [2021-02-19 17:46:16,199 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:46:16,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:16,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:16,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:16,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:16,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:16,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:46:16,269 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:16,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:16,271 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 19 treesize of output 15 [2021-02-19 17:46:16,271 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:16,293 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:16,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:16,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:16,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:46:16,298 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:46:16,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:16,300 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 13 treesize of output 9 [2021-02-19 17:46:16,301 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:46:16,320 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:16,320 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:16,321 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-02-19 17:46:16,387 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:16,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:16,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-02-19 17:46:16,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184811883] [2021-02-19 17:46:16,387 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:46:16,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:16,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:46:16,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:46:16,388 INFO L87 Difference]: Start difference. First operand 81 states and 173 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) [2021-02-19 17:46:17,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:17,133 INFO L93 Difference]: Finished difference Result 198 states and 380 transitions. [2021-02-19 17:46:17,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:46:17,134 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 [2021-02-19 17:46:17,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:17,134 INFO L225 Difference]: With dead ends: 198 [2021-02-19 17:46:17,134 INFO L226 Difference]: Without dead ends: 168 [2021-02-19 17:46:17,135 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=140, Invalid=562, Unknown=0, NotChecked=0, Total=702 [2021-02-19 17:46:17,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-02-19 17:46:17,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 88. [2021-02-19 17:46:17,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 2.206896551724138) internal successors, (192), 87 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) [2021-02-19 17:46:17,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 192 transitions. [2021-02-19 17:46:17,136 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 192 transitions. Word has length 16 [2021-02-19 17:46:17,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:17,136 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 192 transitions. [2021-02-19 17:46:17,136 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) [2021-02-19 17:46:17,136 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 192 transitions. [2021-02-19 17:46:17,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:17,137 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:17,137 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:17,350 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable270 [2021-02-19 17:46:17,350 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:17,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:17,350 INFO L82 PathProgramCache]: Analyzing trace with hash 270881275, now seen corresponding path program 66 times [2021-02-19 17:46:17,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:17,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540620562] [2021-02-19 17:46:17,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:17,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:17,402 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:17,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540620562] [2021-02-19 17:46:17,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216650465] [2021-02-19 17:46:17,402 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 [2021-02-19 17:46:17,423 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:46:17,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:17,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2021-02-19 17:46:17,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:17,485 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 [2021-02-19 17:46:17,486 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:17,487 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 [2021-02-19 17:46:17,488 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:17,499 INFO L628 ElimStorePlain]: treesize reduction 22, result has 29.0 percent of original size [2021-02-19 17:46:17,499 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:46:17,500 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:46:17,500 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:65, output treesize:9 [2021-02-19 17:46:17,512 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:17,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:17,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-02-19 17:46:17,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557505419] [2021-02-19 17:46:17,513 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:46:17,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:17,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:46:17,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:46:17,513 INFO L87 Difference]: Start difference. First operand 88 states and 192 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 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) [2021-02-19 17:46:17,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:17,584 INFO L93 Difference]: Finished difference Result 125 states and 259 transitions. [2021-02-19 17:46:17,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:46:17,584 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 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 [2021-02-19 17:46:17,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:17,584 INFO L225 Difference]: With dead ends: 125 [2021-02-19 17:46:17,584 INFO L226 Difference]: Without dead ends: 125 [2021-02-19 17:46:17,585 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:46:17,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-02-19 17:46:17,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 84. [2021-02-19 17:46:17,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.253012048192771) internal successors, (187), 83 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) [2021-02-19 17:46:17,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 187 transitions. [2021-02-19 17:46:17,586 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 187 transitions. Word has length 17 [2021-02-19 17:46:17,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:17,586 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 187 transitions. [2021-02-19 17:46:17,586 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 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) [2021-02-19 17:46:17,586 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 187 transitions. [2021-02-19 17:46:17,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:17,586 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:17,586 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:17,787 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:17,787 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:17,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:17,787 INFO L82 PathProgramCache]: Analyzing trace with hash 1894745576, now seen corresponding path program 67 times [2021-02-19 17:46:17,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:17,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957663015] [2021-02-19 17:46:17,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:17,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:17,857 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:17,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957663015] [2021-02-19 17:46:17,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252631423] [2021-02-19 17:46:17,857 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) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:17,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:17,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:46:17,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:17,976 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:17,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:17,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-02-19 17:46:17,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502504514] [2021-02-19 17:46:17,977 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:46:17,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:17,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:46:17,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:46:17,977 INFO L87 Difference]: Start difference. First operand 84 states and 187 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) [2021-02-19 17:46:18,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:18,314 INFO L93 Difference]: Finished difference Result 126 states and 255 transitions. [2021-02-19 17:46:18,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:46:18,314 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 [2021-02-19 17:46:18,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:18,314 INFO L225 Difference]: With dead ends: 126 [2021-02-19 17:46:18,314 INFO L226 Difference]: Without dead ends: 112 [2021-02-19 17:46:18,315 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:46:18,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-02-19 17:46:18,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 84. [2021-02-19 17:46:18,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.2289156626506026) internal successors, (185), 83 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) [2021-02-19 17:46:18,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 185 transitions. [2021-02-19 17:46:18,316 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 185 transitions. Word has length 17 [2021-02-19 17:46:18,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:18,316 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 185 transitions. [2021-02-19 17:46:18,316 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) [2021-02-19 17:46:18,316 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 185 transitions. [2021-02-19 17:46:18,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:18,316 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:18,316 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:18,516 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable275,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:18,517 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:18,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:18,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1498571225, now seen corresponding path program 68 times [2021-02-19 17:46:18,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:18,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426999640] [2021-02-19 17:46:18,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:18,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:18,570 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:18,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426999640] [2021-02-19 17:46:18,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806908299] [2021-02-19 17:46:18,570 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 [2021-02-19 17:46:18,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:46:18,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:18,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2021-02-19 17:46:18,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:18,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:18,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:18,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:46:18,695 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:18,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:18,698 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 17 treesize of output 13 [2021-02-19 17:46:18,699 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:18,720 INFO L628 ElimStorePlain]: treesize reduction 34, result has 30.6 percent of original size [2021-02-19 17:46:18,721 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:46:18,722 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:46:18,722 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-02-19 17:46:18,737 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:18,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:18,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-02-19 17:46:18,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388451242] [2021-02-19 17:46:18,737 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:46:18,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:18,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:46:18,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:46:18,738 INFO L87 Difference]: Start difference. First operand 84 states and 185 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) [2021-02-19 17:46:18,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:18,874 INFO L93 Difference]: Finished difference Result 139 states and 286 transitions. [2021-02-19 17:46:18,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:46:18,875 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 [2021-02-19 17:46:18,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:18,875 INFO L225 Difference]: With dead ends: 139 [2021-02-19 17:46:18,875 INFO L226 Difference]: Without dead ends: 139 [2021-02-19 17:46:18,875 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:46:18,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-02-19 17:46:18,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 84. [2021-02-19 17:46:18,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.2289156626506026) internal successors, (185), 83 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) [2021-02-19 17:46:18,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 185 transitions. [2021-02-19 17:46:18,877 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 185 transitions. Word has length 17 [2021-02-19 17:46:18,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:18,877 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 185 transitions. [2021-02-19 17:46:18,877 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) [2021-02-19 17:46:18,877 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 185 transitions. [2021-02-19 17:46:18,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:18,877 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:18,877 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:19,077 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable281 [2021-02-19 17:46:19,077 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:19,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:19,078 INFO L82 PathProgramCache]: Analyzing trace with hash -151217194, now seen corresponding path program 69 times [2021-02-19 17:46:19,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:19,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266434527] [2021-02-19 17:46:19,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:19,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:19,154 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:19,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266434527] [2021-02-19 17:46:19,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422423189] [2021-02-19 17:46:19,154 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 [2021-02-19 17:46:19,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:46:19,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:19,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:46:19,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:19,322 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:19,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:19,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-02-19 17:46:19,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808937023] [2021-02-19 17:46:19,322 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:46:19,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:19,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:46:19,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:46:19,323 INFO L87 Difference]: Start difference. First operand 84 states and 185 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) [2021-02-19 17:46:19,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:19,690 INFO L93 Difference]: Finished difference Result 121 states and 245 transitions. [2021-02-19 17:46:19,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:46:19,690 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 [2021-02-19 17:46:19,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:19,691 INFO L225 Difference]: With dead ends: 121 [2021-02-19 17:46:19,691 INFO L226 Difference]: Without dead ends: 112 [2021-02-19 17:46:19,691 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:46:19,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-02-19 17:46:19,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 84. [2021-02-19 17:46:19,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.216867469879518) internal successors, (184), 83 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) [2021-02-19 17:46:19,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 184 transitions. [2021-02-19 17:46:19,692 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 184 transitions. Word has length 17 [2021-02-19 17:46:19,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:19,692 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 184 transitions. [2021-02-19 17:46:19,692 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) [2021-02-19 17:46:19,692 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 184 transitions. [2021-02-19 17:46:19,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:19,693 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:19,693 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:19,893 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:19,893 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:19,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:19,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1659761797, now seen corresponding path program 70 times [2021-02-19 17:46:19,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:19,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617731557] [2021-02-19 17:46:19,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:19,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:19,949 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:19,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617731557] [2021-02-19 17:46:19,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277435199] [2021-02-19 17:46:19,949 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 [2021-02-19 17:46:19,965 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:46:19,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:19,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:46:19,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:20,103 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:20,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:20,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-02-19 17:46:20,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145708995] [2021-02-19 17:46:20,104 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:46:20,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:20,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:46:20,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:46:20,104 INFO L87 Difference]: Start difference. First operand 84 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) [2021-02-19 17:46:20,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:20,270 INFO L93 Difference]: Finished difference Result 135 states and 277 transitions. [2021-02-19 17:46:20,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:46:20,271 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 [2021-02-19 17:46:20,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:20,271 INFO L225 Difference]: With dead ends: 135 [2021-02-19 17:46:20,271 INFO L226 Difference]: Without dead ends: 135 [2021-02-19 17:46:20,272 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:46:20,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-02-19 17:46:20,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 84. [2021-02-19 17:46:20,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.216867469879518) internal successors, (184), 83 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) [2021-02-19 17:46:20,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 184 transitions. [2021-02-19 17:46:20,273 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 184 transitions. Word has length 17 [2021-02-19 17:46:20,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:20,273 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 184 transitions. [2021-02-19 17:46:20,273 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) [2021-02-19 17:46:20,273 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 184 transitions. [2021-02-19 17:46:20,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:20,273 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:20,273 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:20,474 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2021-02-19 17:46:20,474 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:20,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:20,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1893393428, now seen corresponding path program 71 times [2021-02-19 17:46:20,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:20,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134140120] [2021-02-19 17:46:20,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:20,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:20,565 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:20,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134140120] [2021-02-19 17:46:20,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501535181] [2021-02-19 17:46:20,565 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) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:20,581 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:46:20,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:20,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:46:20,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:20,723 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:20,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:20,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-02-19 17:46:20,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638672145] [2021-02-19 17:46:20,724 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:46:20,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:20,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:46:20,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:46:20,724 INFO L87 Difference]: Start difference. First operand 84 states and 184 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) [2021-02-19 17:46:21,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:21,102 INFO L93 Difference]: Finished difference Result 118 states and 239 transitions. [2021-02-19 17:46:21,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:46:21,102 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 [2021-02-19 17:46:21,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:21,103 INFO L225 Difference]: With dead ends: 118 [2021-02-19 17:46:21,103 INFO L226 Difference]: Without dead ends: 112 [2021-02-19 17:46:21,103 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:46:21,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-02-19 17:46:21,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 84. [2021-02-19 17:46:21,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.2048192771084336) internal successors, (183), 83 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) [2021-02-19 17:46:21,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 183 transitions. [2021-02-19 17:46:21,104 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 183 transitions. Word has length 17 [2021-02-19 17:46:21,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:21,104 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 183 transitions. [2021-02-19 17:46:21,104 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) [2021-02-19 17:46:21,104 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 183 transitions. [2021-02-19 17:46:21,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:21,104 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:21,104 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:21,319 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable293,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:21,319 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:21,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:21,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1803508825, now seen corresponding path program 72 times [2021-02-19 17:46:21,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:21,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039769521] [2021-02-19 17:46:21,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:21,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:21,386 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:21,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039769521] [2021-02-19 17:46:21,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295431950] [2021-02-19 17:46:21,386 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) [2021-02-19 17:46:21,414 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:46:21,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:21,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2021-02-19 17:46:21,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:21,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:21,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:21,532 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 18 treesize of output 14 [2021-02-19 17:46:21,533 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:21,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:21,536 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 18 treesize of output 14 [2021-02-19 17:46:21,537 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:21,589 INFO L628 ElimStorePlain]: treesize reduction 72, result has 41.5 percent of original size [2021-02-19 17:46:21,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:21,598 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 12 treesize of output 8 [2021-02-19 17:46:21,599 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:46:21,617 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:21,619 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 9 treesize of output 7 [2021-02-19 17:46:21,620 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:21,634 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:21,635 INFO L518 ElimStorePlain]: Eliminatee v_prenex_57 vanished before elimination [2021-02-19 17:46:21,636 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:21,636 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-02-19 17:46:21,674 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:21,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:21,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-02-19 17:46:21,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921002515] [2021-02-19 17:46:21,675 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:46:21,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:21,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:46:21,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:46:21,675 INFO L87 Difference]: Start difference. First operand 84 states and 183 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) [2021-02-19 17:46:21,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:21,861 INFO L93 Difference]: Finished difference Result 131 states and 268 transitions. [2021-02-19 17:46:21,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:46:21,861 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 [2021-02-19 17:46:21,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:21,862 INFO L225 Difference]: With dead ends: 131 [2021-02-19 17:46:21,862 INFO L226 Difference]: Without dead ends: 131 [2021-02-19 17:46:21,862 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:46:21,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-02-19 17:46:21,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 83. [2021-02-19 17:46:21,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.1951219512195124) internal successors, (180), 82 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) [2021-02-19 17:46:21,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 180 transitions. [2021-02-19 17:46:21,863 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 180 transitions. Word has length 17 [2021-02-19 17:46:21,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:21,863 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 180 transitions. [2021-02-19 17:46:21,863 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) [2021-02-19 17:46:21,863 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 180 transitions. [2021-02-19 17:46:21,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:21,864 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:21,864 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:22,064 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable299 [2021-02-19 17:46:22,064 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:22,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:22,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1652637974, now seen corresponding path program 73 times [2021-02-19 17:46:22,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:22,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972053870] [2021-02-19 17:46:22,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:22,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:22,159 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:22,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972053870] [2021-02-19 17:46:22,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697327169] [2021-02-19 17:46:22,159 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 [2021-02-19 17:46:22,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:22,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:46:22,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:22,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:22,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:22,321 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 16 treesize of output 12 [2021-02-19 17:46:22,322 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:22,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:22,324 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 [2021-02-19 17:46:22,325 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:22,364 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-02-19 17:46:22,365 INFO L518 ElimStorePlain]: Eliminatee v_prenex_60 vanished before elimination [2021-02-19 17:46:22,366 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 [2021-02-19 17:46:22,367 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:22,380 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:22,380 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:46:22,381 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:22,381 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-02-19 17:46:22,410 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:22,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:22,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-02-19 17:46:22,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593782075] [2021-02-19 17:46:22,411 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:46:22,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:22,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:46:22,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:46:22,411 INFO L87 Difference]: Start difference. First operand 83 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) [2021-02-19 17:46:22,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:22,980 INFO L93 Difference]: Finished difference Result 130 states and 257 transitions. [2021-02-19 17:46:22,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:46:22,980 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 [2021-02-19 17:46:22,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:22,981 INFO L225 Difference]: With dead ends: 130 [2021-02-19 17:46:22,981 INFO L226 Difference]: Without dead ends: 127 [2021-02-19 17:46:22,981 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:46:22,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-02-19 17:46:22,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 88. [2021-02-19 17:46:22,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 2.1954022988505746) internal successors, (191), 87 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:22,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 191 transitions. [2021-02-19 17:46:22,982 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 191 transitions. Word has length 17 [2021-02-19 17:46:22,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:22,982 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 191 transitions. [2021-02-19 17:46:22,982 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) [2021-02-19 17:46:22,982 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 191 transitions. [2021-02-19 17:46:22,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:22,983 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:22,983 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:23,196 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable303,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:23,197 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:23,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:23,197 INFO L82 PathProgramCache]: Analyzing trace with hash 2044120748, now seen corresponding path program 74 times [2021-02-19 17:46:23,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:23,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532495739] [2021-02-19 17:46:23,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:23,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:23,277 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:23,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532495739] [2021-02-19 17:46:23,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290393952] [2021-02-19 17:46:23,277 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 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 [2021-02-19 17:46:23,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:46:23,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:23,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:46:23,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:23,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:23,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:23,429 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 15 treesize of output 11 [2021-02-19 17:46:23,429 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:23,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:23,432 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 16 treesize of output 12 [2021-02-19 17:46:23,432 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:23,469 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-02-19 17:46:23,469 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:46:23,470 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 [2021-02-19 17:46:23,471 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:23,483 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:23,483 INFO L518 ElimStorePlain]: Eliminatee v_prenex_63 vanished before elimination [2021-02-19 17:46:23,484 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:23,484 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-02-19 17:46:23,509 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:23,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:23,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-02-19 17:46:23,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521307204] [2021-02-19 17:46:23,509 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:46:23,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:23,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:46:23,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:46:23,509 INFO L87 Difference]: Start difference. First operand 88 states and 191 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) [2021-02-19 17:46:23,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:23,854 INFO L93 Difference]: Finished difference Result 115 states and 236 transitions. [2021-02-19 17:46:23,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:46:23,855 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 [2021-02-19 17:46:23,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:23,855 INFO L225 Difference]: With dead ends: 115 [2021-02-19 17:46:23,855 INFO L226 Difference]: Without dead ends: 115 [2021-02-19 17:46:23,855 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:46:23,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-02-19 17:46:23,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 84. [2021-02-19 17:46:23,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.1927710843373496) internal successors, (182), 83 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) [2021-02-19 17:46:23,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 182 transitions. [2021-02-19 17:46:23,857 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 182 transitions. Word has length 17 [2021-02-19 17:46:23,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:23,857 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 182 transitions. [2021-02-19 17:46:23,857 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) [2021-02-19 17:46:23,857 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 182 transitions. [2021-02-19 17:46:23,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:23,857 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:23,857 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:24,070 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable311 [2021-02-19 17:46:24,070 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:24,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:24,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1528938893, now seen corresponding path program 75 times [2021-02-19 17:46:24,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:24,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77186749] [2021-02-19 17:46:24,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:24,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:24,135 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:24,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77186749] [2021-02-19 17:46:24,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584802479] [2021-02-19 17:46:24,136 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 [2021-02-19 17:46:24,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:46:24,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:24,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:46:24,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:24,268 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:24,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:24,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-02-19 17:46:24,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579219152] [2021-02-19 17:46:24,269 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:46:24,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:24,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:46:24,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:46:24,269 INFO L87 Difference]: Start difference. First operand 84 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) [2021-02-19 17:46:24,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:24,331 INFO L93 Difference]: Finished difference Result 106 states and 225 transitions. [2021-02-19 17:46:24,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:46:24,331 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 [2021-02-19 17:46:24,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:24,332 INFO L225 Difference]: With dead ends: 106 [2021-02-19 17:46:24,332 INFO L226 Difference]: Without dead ends: 106 [2021-02-19 17:46:24,332 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:46:24,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-02-19 17:46:24,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 86. [2021-02-19 17:46:24,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.2) internal successors, (187), 85 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) [2021-02-19 17:46:24,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 187 transitions. [2021-02-19 17:46:24,333 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 187 transitions. Word has length 17 [2021-02-19 17:46:24,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:24,333 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 187 transitions. [2021-02-19 17:46:24,333 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) [2021-02-19 17:46:24,333 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 187 transitions. [2021-02-19 17:46:24,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:24,334 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:24,334 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:24,548 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable318,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:24,548 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:24,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:24,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1418674372, now seen corresponding path program 76 times [2021-02-19 17:46:24,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:24,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160834024] [2021-02-19 17:46:24,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:24,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:24,613 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:24,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160834024] [2021-02-19 17:46:24,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799369947] [2021-02-19 17:46:24,613 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 [2021-02-19 17:46:24,629 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:46:24,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:24,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:46:24,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:24,750 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:24,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:24,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-02-19 17:46:24,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553528629] [2021-02-19 17:46:24,751 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:46:24,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:24,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:46:24,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:46:24,752 INFO L87 Difference]: Start difference. First operand 86 states and 187 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) [2021-02-19 17:46:24,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:24,958 INFO L93 Difference]: Finished difference Result 100 states and 208 transitions. [2021-02-19 17:46:24,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:46:24,958 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 [2021-02-19 17:46:24,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:24,959 INFO L225 Difference]: With dead ends: 100 [2021-02-19 17:46:24,959 INFO L226 Difference]: Without dead ends: 91 [2021-02-19 17:46:24,959 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:46:24,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-02-19 17:46:24,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 86. [2021-02-19 17:46:24,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.1882352941176473) internal successors, (186), 85 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) [2021-02-19 17:46:24,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 186 transitions. [2021-02-19 17:46:24,960 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 186 transitions. Word has length 17 [2021-02-19 17:46:24,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:24,960 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 186 transitions. [2021-02-19 17:46:24,960 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) [2021-02-19 17:46:24,960 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 186 transitions. [2021-02-19 17:46:24,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:24,961 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:24,961 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:25,161 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable322 [2021-02-19 17:46:25,161 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:25,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:25,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1367748321, now seen corresponding path program 77 times [2021-02-19 17:46:25,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:25,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675233307] [2021-02-19 17:46:25,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:25,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:25,223 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:25,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675233307] [2021-02-19 17:46:25,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844448989] [2021-02-19 17:46:25,223 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) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:25,242 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:46:25,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:25,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:46:25,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:25,374 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:25,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:25,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-02-19 17:46:25,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801831952] [2021-02-19 17:46:25,375 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:46:25,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:25,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:46:25,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:46:25,375 INFO L87 Difference]: Start difference. First operand 86 states and 186 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) [2021-02-19 17:46:25,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:25,487 INFO L93 Difference]: Finished difference Result 119 states and 251 transitions. [2021-02-19 17:46:25,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:46:25,487 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 [2021-02-19 17:46:25,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:25,488 INFO L225 Difference]: With dead ends: 119 [2021-02-19 17:46:25,488 INFO L226 Difference]: Without dead ends: 119 [2021-02-19 17:46:25,488 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:46:25,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-02-19 17:46:25,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 87. [2021-02-19 17:46:25,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.197674418604651) internal successors, (189), 86 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) [2021-02-19 17:46:25,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 189 transitions. [2021-02-19 17:46:25,489 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 189 transitions. Word has length 17 [2021-02-19 17:46:25,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:25,489 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 189 transitions. [2021-02-19 17:46:25,489 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) [2021-02-19 17:46:25,489 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 189 transitions. [2021-02-19 17:46:25,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:25,489 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:25,490 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:25,704 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable328 [2021-02-19 17:46:25,704 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:25,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:25,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1134116690, now seen corresponding path program 78 times [2021-02-19 17:46:25,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:25,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477280398] [2021-02-19 17:46:25,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:25,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:25,776 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:25,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477280398] [2021-02-19 17:46:25,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282484216] [2021-02-19 17:46:25,776 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 [2021-02-19 17:46:25,793 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-02-19 17:46:25,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:25,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:46:25,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:25,918 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:25,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:25,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-02-19 17:46:25,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362418532] [2021-02-19 17:46:25,918 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:46:25,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:25,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:46:25,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:46:25,918 INFO L87 Difference]: Start difference. First operand 87 states and 189 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) [2021-02-19 17:46:26,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:26,167 INFO L93 Difference]: Finished difference Result 98 states and 205 transitions. [2021-02-19 17:46:26,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:46:26,168 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 [2021-02-19 17:46:26,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:26,168 INFO L225 Difference]: With dead ends: 98 [2021-02-19 17:46:26,168 INFO L226 Difference]: Without dead ends: 92 [2021-02-19 17:46:26,168 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:46:26,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-02-19 17:46:26,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 87. [2021-02-19 17:46:26,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.186046511627907) internal successors, (188), 86 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:26,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 188 transitions. [2021-02-19 17:46:26,169 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 188 transitions. Word has length 17 [2021-02-19 17:46:26,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:26,169 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 188 transitions. [2021-02-19 17:46:26,169 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) [2021-02-19 17:46:26,169 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 188 transitions. [2021-02-19 17:46:26,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:26,170 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:26,170 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:26,384 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable332 [2021-02-19 17:46:26,384 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:26,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:26,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1018763609, now seen corresponding path program 79 times [2021-02-19 17:46:26,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:26,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102614038] [2021-02-19 17:46:26,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:26,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:26,442 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:26,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102614038] [2021-02-19 17:46:26,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002915854] [2021-02-19 17:46:26,442 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 [2021-02-19 17:46:26,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:26,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:46:26,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:26,604 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:26,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:26,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-02-19 17:46:26,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071735863] [2021-02-19 17:46:26,605 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:46:26,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:26,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:46:26,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:46:26,605 INFO L87 Difference]: Start difference. First operand 87 states and 188 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) [2021-02-19 17:46:26,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:26,723 INFO L93 Difference]: Finished difference Result 117 states and 248 transitions. [2021-02-19 17:46:26,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:46:26,723 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 [2021-02-19 17:46:26,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:26,724 INFO L225 Difference]: With dead ends: 117 [2021-02-19 17:46:26,724 INFO L226 Difference]: Without dead ends: 117 [2021-02-19 17:46:26,724 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:46:26,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-02-19 17:46:26,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 87. [2021-02-19 17:46:26,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.186046511627907) internal successors, (188), 86 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:26,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 188 transitions. [2021-02-19 17:46:26,725 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 188 transitions. Word has length 17 [2021-02-19 17:46:26,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:26,725 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 188 transitions. [2021-02-19 17:46:26,725 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) [2021-02-19 17:46:26,725 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 188 transitions. [2021-02-19 17:46:26,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:26,725 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:26,725 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:26,929 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable338,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:26,930 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:26,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:26,930 INFO L82 PathProgramCache]: Analyzing trace with hash 385180796, now seen corresponding path program 80 times [2021-02-19 17:46:26,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:26,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180840082] [2021-02-19 17:46:26,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:26,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:27,007 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:27,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180840082] [2021-02-19 17:46:27,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194150769] [2021-02-19 17:46:27,008 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 [2021-02-19 17:46:27,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:46:27,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:27,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:46:27,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:27,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:27,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:27,128 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 16 treesize of output 12 [2021-02-19 17:46:27,128 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:27,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:27,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:46:27,136 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:27,171 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-02-19 17:46:27,173 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 [2021-02-19 17:46:27,174 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:27,186 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:27,186 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:46:27,186 INFO L518 ElimStorePlain]: Eliminatee v_prenex_69 vanished before elimination [2021-02-19 17:46:27,187 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:27,187 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-02-19 17:46:27,213 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:27,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:27,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-02-19 17:46:27,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958525799] [2021-02-19 17:46:27,213 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:46:27,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:27,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:46:27,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:46:27,214 INFO L87 Difference]: Start difference. First operand 87 states and 188 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) [2021-02-19 17:46:27,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:27,555 INFO L93 Difference]: Finished difference Result 111 states and 226 transitions. [2021-02-19 17:46:27,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:46:27,555 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 [2021-02-19 17:46:27,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:27,556 INFO L225 Difference]: With dead ends: 111 [2021-02-19 17:46:27,556 INFO L226 Difference]: Without dead ends: 108 [2021-02-19 17:46:27,556 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:46:27,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-02-19 17:46:27,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 92. [2021-02-19 17:46:27,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.1868131868131866) internal successors, (199), 91 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) [2021-02-19 17:46:27,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 199 transitions. [2021-02-19 17:46:27,557 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 199 transitions. Word has length 17 [2021-02-19 17:46:27,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:27,557 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 199 transitions. [2021-02-19 17:46:27,557 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) [2021-02-19 17:46:27,557 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 199 transitions. [2021-02-19 17:46:27,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:27,558 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:27,558 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:27,762 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:27,762 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:27,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:27,762 INFO L82 PathProgramCache]: Analyzing trace with hash 776663570, now seen corresponding path program 81 times [2021-02-19 17:46:27,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:27,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682317826] [2021-02-19 17:46:27,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:27,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:27,839 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:27,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682317826] [2021-02-19 17:46:27,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310700931] [2021-02-19 17:46:27,839 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 [2021-02-19 17:46:27,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:46:27,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:27,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:46:27,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:27,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:27,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:27,962 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 [2021-02-19 17:46:27,963 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:27,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:27,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:46:27,967 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:28,005 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-02-19 17:46:28,007 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 [2021-02-19 17:46:28,008 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:28,020 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:28,020 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:46:28,020 INFO L518 ElimStorePlain]: Eliminatee v_prenex_73 vanished before elimination [2021-02-19 17:46:28,021 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:28,021 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-02-19 17:46:28,046 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:28,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:28,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-02-19 17:46:28,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218846265] [2021-02-19 17:46:28,046 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:46:28,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:28,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:46:28,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:46:28,051 INFO L87 Difference]: Start difference. First operand 92 states and 199 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) [2021-02-19 17:46:28,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:28,249 INFO L93 Difference]: Finished difference Result 96 states and 205 transitions. [2021-02-19 17:46:28,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:46:28,249 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 [2021-02-19 17:46:28,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:28,249 INFO L225 Difference]: With dead ends: 96 [2021-02-19 17:46:28,249 INFO L226 Difference]: Without dead ends: 96 [2021-02-19 17:46:28,250 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:46:28,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-02-19 17:46:28,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 85. [2021-02-19 17:46:28,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.1904761904761907) internal successors, (184), 84 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) [2021-02-19 17:46:28,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 184 transitions. [2021-02-19 17:46:28,251 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 184 transitions. Word has length 17 [2021-02-19 17:46:28,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:28,251 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 184 transitions. [2021-02-19 17:46:28,251 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) [2021-02-19 17:46:28,251 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 184 transitions. [2021-02-19 17:46:28,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:28,251 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:28,251 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:28,465 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable358,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:28,465 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:28,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:28,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1886983177, now seen corresponding path program 82 times [2021-02-19 17:46:28,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:28,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487356275] [2021-02-19 17:46:28,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:28,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:28,527 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:28,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487356275] [2021-02-19 17:46:28,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127152691] [2021-02-19 17:46:28,528 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 [2021-02-19 17:46:28,547 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:46:28,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:28,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:46:28,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:28,650 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:28,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:28,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-02-19 17:46:28,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407424149] [2021-02-19 17:46:28,651 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:46:28,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:28,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:46:28,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:46:28,651 INFO L87 Difference]: Start difference. First operand 85 states and 184 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) [2021-02-19 17:46:28,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:28,817 INFO L93 Difference]: Finished difference Result 121 states and 255 transitions. [2021-02-19 17:46:28,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:46:28,817 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 [2021-02-19 17:46:28,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:28,818 INFO L225 Difference]: With dead ends: 121 [2021-02-19 17:46:28,818 INFO L226 Difference]: Without dead ends: 121 [2021-02-19 17:46:28,818 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:46:28,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-02-19 17:46:28,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 89. [2021-02-19 17:46:28,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 2.1931818181818183) internal successors, (193), 88 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:28,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 193 transitions. [2021-02-19 17:46:28,820 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 193 transitions. Word has length 17 [2021-02-19 17:46:28,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:28,820 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 193 transitions. [2021-02-19 17:46:28,820 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) [2021-02-19 17:46:28,820 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 193 transitions. [2021-02-19 17:46:28,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:28,821 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:28,821 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:29,021 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable365 [2021-02-19 17:46:29,022 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:29,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:29,022 INFO L82 PathProgramCache]: Analyzing trace with hash -2120614808, now seen corresponding path program 83 times [2021-02-19 17:46:29,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:29,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562554363] [2021-02-19 17:46:29,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:29,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:29,085 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:29,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562554363] [2021-02-19 17:46:29,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856350404] [2021-02-19 17:46:29,085 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 [2021-02-19 17:46:29,101 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:46:29,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:29,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:46:29,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:29,205 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:29,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:29,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-02-19 17:46:29,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79147073] [2021-02-19 17:46:29,205 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:46:29,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:29,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:46:29,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:46:29,206 INFO L87 Difference]: Start difference. First operand 89 states and 193 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) [2021-02-19 17:46:29,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:29,461 INFO L93 Difference]: Finished difference Result 100 states and 209 transitions. [2021-02-19 17:46:29,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:46:29,462 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 [2021-02-19 17:46:29,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:29,462 INFO L225 Difference]: With dead ends: 100 [2021-02-19 17:46:29,462 INFO L226 Difference]: Without dead ends: 94 [2021-02-19 17:46:29,462 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:46:29,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-02-19 17:46:29,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 89. [2021-02-19 17:46:29,463 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) [2021-02-19 17:46:29,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 192 transitions. [2021-02-19 17:46:29,463 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 192 transitions. Word has length 17 [2021-02-19 17:46:29,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:29,463 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 192 transitions. [2021-02-19 17:46:29,463 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) [2021-02-19 17:46:29,463 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 192 transitions. [2021-02-19 17:46:29,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:29,464 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:29,464 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:29,664 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable369,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:29,664 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:29,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:29,664 INFO L82 PathProgramCache]: Analyzing trace with hash 2058999407, now seen corresponding path program 84 times [2021-02-19 17:46:29,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:29,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107377387] [2021-02-19 17:46:29,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:29,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:29,731 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:29,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107377387] [2021-02-19 17:46:29,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533169660] [2021-02-19 17:46:29,731 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 [2021-02-19 17:46:29,751 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:46:29,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:29,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:46:29,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:29,889 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:29,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:29,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-02-19 17:46:29,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009877080] [2021-02-19 17:46:29,890 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:46:29,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:29,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:46:29,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:46:29,890 INFO L87 Difference]: Start difference. First operand 89 states and 192 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) [2021-02-19 17:46:30,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:30,132 INFO L93 Difference]: Finished difference Result 129 states and 272 transitions. [2021-02-19 17:46:30,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:46:30,132 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 [2021-02-19 17:46:30,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:30,133 INFO L225 Difference]: With dead ends: 129 [2021-02-19 17:46:30,133 INFO L226 Difference]: Without dead ends: 129 [2021-02-19 17:46:30,133 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:46:30,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-02-19 17:46:30,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 89. [2021-02-19 17:46:30,134 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) [2021-02-19 17:46:30,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 192 transitions. [2021-02-19 17:46:30,134 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 192 transitions. Word has length 17 [2021-02-19 17:46:30,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:30,134 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 192 transitions. [2021-02-19 17:46:30,135 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) [2021-02-19 17:46:30,135 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 192 transitions. [2021-02-19 17:46:30,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:30,135 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:30,135 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:30,346 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable375 [2021-02-19 17:46:30,346 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:30,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:30,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1425416594, now seen corresponding path program 85 times [2021-02-19 17:46:30,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:30,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692848446] [2021-02-19 17:46:30,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:30,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:30,411 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:30,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692848446] [2021-02-19 17:46:30,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380397018] [2021-02-19 17:46:30,411 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 [2021-02-19 17:46:30,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:30,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:46:30,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:30,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:30,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:30,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:46:30,510 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:30,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:30,513 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 16 treesize of output 12 [2021-02-19 17:46:30,513 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:30,548 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-02-19 17:46:30,548 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:46:30,550 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 [2021-02-19 17:46:30,551 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:30,563 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:30,563 INFO L518 ElimStorePlain]: Eliminatee v_prenex_74 vanished before elimination [2021-02-19 17:46:30,564 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:30,564 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-02-19 17:46:30,590 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:30,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:30,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-02-19 17:46:30,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109549491] [2021-02-19 17:46:30,590 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:46:30,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:30,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:46:30,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:46:30,591 INFO L87 Difference]: Start difference. First operand 89 states and 192 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) [2021-02-19 17:46:30,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:30,922 INFO L93 Difference]: Finished difference Result 120 states and 244 transitions. [2021-02-19 17:46:30,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:46:30,923 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 [2021-02-19 17:46:30,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:30,923 INFO L225 Difference]: With dead ends: 120 [2021-02-19 17:46:30,923 INFO L226 Difference]: Without dead ends: 117 [2021-02-19 17:46:30,923 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:46:30,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-02-19 17:46:30,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 94. [2021-02-19 17:46:30,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.182795698924731) internal successors, (203), 93 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) [2021-02-19 17:46:30,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 203 transitions. [2021-02-19 17:46:30,925 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 203 transitions. Word has length 17 [2021-02-19 17:46:30,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:30,925 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 203 transitions. [2021-02-19 17:46:30,925 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) [2021-02-19 17:46:30,925 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 203 transitions. [2021-02-19 17:46:30,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:30,925 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:30,925 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:31,139 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable385,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:31,139 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:31,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:31,140 INFO L82 PathProgramCache]: Analyzing trace with hash 1816899368, now seen corresponding path program 86 times [2021-02-19 17:46:31,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:31,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762314903] [2021-02-19 17:46:31,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:31,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:31,211 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:31,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762314903] [2021-02-19 17:46:31,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210367369] [2021-02-19 17:46:31,211 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 [2021-02-19 17:46:31,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:46:31,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:31,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:46:31,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:31,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:31,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:31,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:46:31,311 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:31,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:31,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:46:31,315 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:31,353 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-02-19 17:46:31,353 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:46:31,355 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 [2021-02-19 17:46:31,356 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:31,368 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:31,368 INFO L518 ElimStorePlain]: Eliminatee v_prenex_77 vanished before elimination [2021-02-19 17:46:31,369 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:31,369 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-02-19 17:46:31,402 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:31,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:31,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-02-19 17:46:31,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438108485] [2021-02-19 17:46:31,402 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:46:31,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:31,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:46:31,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:46:31,404 INFO L87 Difference]: Start difference. First operand 94 states and 203 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) [2021-02-19 17:46:31,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:31,660 INFO L93 Difference]: Finished difference Result 105 states and 223 transitions. [2021-02-19 17:46:31,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:46:31,661 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 [2021-02-19 17:46:31,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:31,661 INFO L225 Difference]: With dead ends: 105 [2021-02-19 17:46:31,661 INFO L226 Difference]: Without dead ends: 105 [2021-02-19 17:46:31,661 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:46:31,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-02-19 17:46:31,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 88. [2021-02-19 17:46:31,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 2.1839080459770117) internal successors, (190), 87 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) [2021-02-19 17:46:31,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 190 transitions. [2021-02-19 17:46:31,663 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 190 transitions. Word has length 17 [2021-02-19 17:46:31,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:31,663 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 190 transitions. [2021-02-19 17:46:31,663 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) [2021-02-19 17:46:31,663 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 190 transitions. [2021-02-19 17:46:31,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:31,663 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:31,663 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:31,863 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable393,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:31,864 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:31,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:31,864 INFO L82 PathProgramCache]: Analyzing trace with hash -1648222567, now seen corresponding path program 87 times [2021-02-19 17:46:31,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:31,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102734744] [2021-02-19 17:46:31,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:31,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:31,935 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:31,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102734744] [2021-02-19 17:46:31,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022447917] [2021-02-19 17:46:31,935 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 [2021-02-19 17:46:31,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:46:31,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:31,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:46:31,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:32,067 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:32,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:32,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-02-19 17:46:32,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147353093] [2021-02-19 17:46:32,067 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:46:32,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:32,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:46:32,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:46:32,067 INFO L87 Difference]: Start difference. First operand 88 states and 190 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) [2021-02-19 17:46:32,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:32,285 INFO L93 Difference]: Finished difference Result 129 states and 265 transitions. [2021-02-19 17:46:32,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:46:32,286 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 [2021-02-19 17:46:32,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:32,286 INFO L225 Difference]: With dead ends: 129 [2021-02-19 17:46:32,286 INFO L226 Difference]: Without dead ends: 129 [2021-02-19 17:46:32,286 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:46:32,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-02-19 17:46:32,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 89. [2021-02-19 17:46:32,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 2.1931818181818183) internal successors, (193), 88 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:32,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 193 transitions. [2021-02-19 17:46:32,288 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 193 transitions. Word has length 17 [2021-02-19 17:46:32,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:32,288 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 193 transitions. [2021-02-19 17:46:32,288 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) [2021-02-19 17:46:32,288 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 193 transitions. [2021-02-19 17:46:32,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:32,288 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:32,288 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:32,488 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable400 [2021-02-19 17:46:32,489 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:32,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:32,489 INFO L82 PathProgramCache]: Analyzing trace with hash 2013161916, now seen corresponding path program 88 times [2021-02-19 17:46:32,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:32,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835189772] [2021-02-19 17:46:32,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:32,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:32,551 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:32,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835189772] [2021-02-19 17:46:32,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764050709] [2021-02-19 17:46:32,551 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 [2021-02-19 17:46:32,569 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:46:32,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:32,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:46:32,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:32,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:32,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:32,655 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 15 treesize of output 11 [2021-02-19 17:46:32,656 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:32,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:32,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:32,658 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 17 treesize of output 13 [2021-02-19 17:46:32,659 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:32,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:32,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:32,662 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 16 treesize of output 12 [2021-02-19 17:46:32,662 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:32,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:32,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:46:32,665 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:32,698 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-02-19 17:46:32,699 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:46:32,699 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:32,700 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-02-19 17:46:32,730 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:32,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:32,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-02-19 17:46:32,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22484505] [2021-02-19 17:46:32,730 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:46:32,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:32,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:46:32,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:46:32,731 INFO L87 Difference]: Start difference. First operand 89 states and 193 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) [2021-02-19 17:46:32,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:32,904 INFO L93 Difference]: Finished difference Result 135 states and 274 transitions. [2021-02-19 17:46:32,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:46:32,905 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 [2021-02-19 17:46:32,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:32,905 INFO L225 Difference]: With dead ends: 135 [2021-02-19 17:46:32,905 INFO L226 Difference]: Without dead ends: 132 [2021-02-19 17:46:32,905 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:46:32,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-02-19 17:46:32,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 95. [2021-02-19 17:46:32,907 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) [2021-02-19 17:46:32,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 207 transitions. [2021-02-19 17:46:32,907 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 207 transitions. Word has length 17 [2021-02-19 17:46:32,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:32,907 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 207 transitions. [2021-02-19 17:46:32,907 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) [2021-02-19 17:46:32,907 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 207 transitions. [2021-02-19 17:46:32,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:32,907 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:32,907 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:33,107 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable410 [2021-02-19 17:46:33,108 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:33,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:33,108 INFO L82 PathProgramCache]: Analyzing trace with hash -1890322606, now seen corresponding path program 89 times [2021-02-19 17:46:33,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:33,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807859205] [2021-02-19 17:46:33,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:33,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:33,167 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:33,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807859205] [2021-02-19 17:46:33,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771805156] [2021-02-19 17:46:33,167 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 [2021-02-19 17:46:33,184 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:46:33,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:33,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:46:33,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:33,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:33,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:33,261 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 [2021-02-19 17:46:33,262 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:33,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:33,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:33,264 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 17 treesize of output 13 [2021-02-19 17:46:33,265 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:33,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:33,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:33,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:46:33,268 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:33,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:33,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:46:33,274 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:33,305 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-02-19 17:46:33,305 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:46:33,306 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:33,306 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-02-19 17:46:33,340 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:33,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:33,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-02-19 17:46:33,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696530635] [2021-02-19 17:46:33,340 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:46:33,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:33,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:46:33,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:46:33,341 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) [2021-02-19 17:46:33,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:33,591 INFO L93 Difference]: Finished difference Result 140 states and 286 transitions. [2021-02-19 17:46:33,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:46:33,591 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 [2021-02-19 17:46:33,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:33,592 INFO L225 Difference]: With dead ends: 140 [2021-02-19 17:46:33,592 INFO L226 Difference]: Without dead ends: 140 [2021-02-19 17:46:33,592 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:46:33,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-02-19 17:46:33,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 94. [2021-02-19 17:46:33,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.204301075268817) internal successors, (205), 93 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) [2021-02-19 17:46:33,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 205 transitions. [2021-02-19 17:46:33,593 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 205 transitions. Word has length 17 [2021-02-19 17:46:33,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:33,593 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 205 transitions. [2021-02-19 17:46:33,594 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) [2021-02-19 17:46:33,594 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 205 transitions. [2021-02-19 17:46:33,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:33,594 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:33,594 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:33,808 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable421,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:33,808 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:33,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:33,809 INFO L82 PathProgramCache]: Analyzing trace with hash -815583335, now seen corresponding path program 90 times [2021-02-19 17:46:33,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:33,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079342239] [2021-02-19 17:46:33,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:33,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:33,885 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:33,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079342239] [2021-02-19 17:46:33,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069366909] [2021-02-19 17:46:33,886 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) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:33,906 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:46:33,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:33,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2021-02-19 17:46:33,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:33,982 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:33,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:33,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-02-19 17:46:33,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802331224] [2021-02-19 17:46:33,982 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:46:33,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:33,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:46:33,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:46:33,982 INFO L87 Difference]: Start difference. First operand 94 states and 205 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) [2021-02-19 17:46:34,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:34,104 INFO L93 Difference]: Finished difference Result 104 states and 220 transitions. [2021-02-19 17:46:34,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:46:34,105 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 [2021-02-19 17:46:34,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:34,105 INFO L225 Difference]: With dead ends: 104 [2021-02-19 17:46:34,105 INFO L226 Difference]: Without dead ends: 100 [2021-02-19 17:46:34,105 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:46:34,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-02-19 17:46:34,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 94. [2021-02-19 17:46:34,106 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) [2021-02-19 17:46:34,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 204 transitions. [2021-02-19 17:46:34,107 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 204 transitions. Word has length 17 [2021-02-19 17:46:34,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:34,107 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 204 transitions. [2021-02-19 17:46:34,107 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) [2021-02-19 17:46:34,107 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 204 transitions. [2021-02-19 17:46:34,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:34,107 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:34,107 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:34,322 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable431 [2021-02-19 17:46:34,322 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:34,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:34,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1869414888, now seen corresponding path program 91 times [2021-02-19 17:46:34,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:34,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015902106] [2021-02-19 17:46:34,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:34,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:34,383 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:34,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015902106] [2021-02-19 17:46:34,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477035069] [2021-02-19 17:46:34,384 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) [2021-02-19 17:46:34,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:34,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:46:34,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:34,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:34,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:34,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:46:34,484 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:34,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:34,487 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 15 treesize of output 11 [2021-02-19 17:46:34,487 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:34,501 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-02-19 17:46:34,501 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:46:34,502 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:46:34,502 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-02-19 17:46:34,516 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:34,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:34,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-02-19 17:46:34,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022251567] [2021-02-19 17:46:34,517 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:46:34,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:34,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:46:34,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:46:34,517 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) [2021-02-19 17:46:34,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:34,659 INFO L93 Difference]: Finished difference Result 116 states and 245 transitions. [2021-02-19 17:46:34,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:46:34,659 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 [2021-02-19 17:46:34,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:34,659 INFO L225 Difference]: With dead ends: 116 [2021-02-19 17:46:34,660 INFO L226 Difference]: Without dead ends: 116 [2021-02-19 17:46:34,660 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:46:34,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-02-19 17:46:34,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 89. [2021-02-19 17:46:34,661 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) [2021-02-19 17:46:34,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 192 transitions. [2021-02-19 17:46:34,661 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 192 transitions. Word has length 17 [2021-02-19 17:46:34,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:34,661 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 192 transitions. [2021-02-19 17:46:34,661 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) [2021-02-19 17:46:34,661 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 192 transitions. [2021-02-19 17:46:34,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:34,661 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:34,661 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:34,876 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable435 [2021-02-19 17:46:34,876 INFO L428 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:34,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:34,876 INFO L82 PathProgramCache]: Analyzing trace with hash 892472039, now seen corresponding path program 92 times [2021-02-19 17:46:34,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:34,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049043760] [2021-02-19 17:46:34,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:34,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:34,934 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:34,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049043760] [2021-02-19 17:46:34,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890126832] [2021-02-19 17:46:34,934 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 [2021-02-19 17:46:34,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:46:34,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:34,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:46:34,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:35,082 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:35,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:35,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-02-19 17:46:35,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017888424] [2021-02-19 17:46:35,082 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:46:35,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:35,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:46:35,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:46:35,083 INFO L87 Difference]: Start difference. First operand 89 states and 192 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) [2021-02-19 17:46:35,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:35,193 INFO L93 Difference]: Finished difference Result 108 states and 230 transitions. [2021-02-19 17:46:35,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:46:35,194 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 [2021-02-19 17:46:35,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:35,194 INFO L225 Difference]: With dead ends: 108 [2021-02-19 17:46:35,194 INFO L226 Difference]: Without dead ends: 108 [2021-02-19 17:46:35,194 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:46:35,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-02-19 17:46:35,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 90. [2021-02-19 17:46:35,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.191011235955056) internal successors, (195), 89 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:35,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 195 transitions. [2021-02-19 17:46:35,195 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 195 transitions. Word has length 17 [2021-02-19 17:46:35,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:35,196 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 195 transitions. [2021-02-19 17:46:35,196 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) [2021-02-19 17:46:35,196 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 195 transitions. [2021-02-19 17:46:35,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:35,196 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:35,196 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:35,396 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable439,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:35,396 INFO L428 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:35,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:35,397 INFO L82 PathProgramCache]: Analyzing trace with hash -2055141226, now seen corresponding path program 93 times [2021-02-19 17:46:35,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:35,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995571238] [2021-02-19 17:46:35,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:35,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:35,473 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:35,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995571238] [2021-02-19 17:46:35,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336548446] [2021-02-19 17:46:35,473 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 [2021-02-19 17:46:35,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:46:35,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:35,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:46:35,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:35,635 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:35,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:35,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-02-19 17:46:35,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347190874] [2021-02-19 17:46:35,635 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:46:35,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:35,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:46:35,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:46:35,636 INFO L87 Difference]: Start difference. First operand 90 states and 195 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) [2021-02-19 17:46:35,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:35,836 INFO L93 Difference]: Finished difference Result 102 states and 213 transitions. [2021-02-19 17:46:35,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:46:35,837 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 [2021-02-19 17:46:35,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:35,837 INFO L225 Difference]: With dead ends: 102 [2021-02-19 17:46:35,837 INFO L226 Difference]: Without dead ends: 93 [2021-02-19 17:46:35,837 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:46:35,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-02-19 17:46:35,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 90. [2021-02-19 17:46:35,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.1797752808988764) internal successors, (194), 89 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) [2021-02-19 17:46:35,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 194 transitions. [2021-02-19 17:46:35,838 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 194 transitions. Word has length 17 [2021-02-19 17:46:35,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:35,838 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 194 transitions. [2021-02-19 17:46:35,838 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) [2021-02-19 17:46:35,838 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 194 transitions. [2021-02-19 17:46:35,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:35,839 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:35,839 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:36,053 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable443 [2021-02-19 17:46:36,053 INFO L428 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:36,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:36,053 INFO L82 PathProgramCache]: Analyzing trace with hash 731281467, now seen corresponding path program 94 times [2021-02-19 17:46:36,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:36,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880582525] [2021-02-19 17:46:36,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:36,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:36,127 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:36,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880582525] [2021-02-19 17:46:36,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111324116] [2021-02-19 17:46:36,127 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 [2021-02-19 17:46:36,149 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:46:36,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:36,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:46:36,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:36,301 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:36,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:36,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-02-19 17:46:36,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418693414] [2021-02-19 17:46:36,302 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:46:36,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:36,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:46:36,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:46:36,302 INFO L87 Difference]: Start difference. First operand 90 states and 194 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) [2021-02-19 17:46:36,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:36,571 INFO L93 Difference]: Finished difference Result 121 states and 256 transitions. [2021-02-19 17:46:36,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:46:36,571 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 [2021-02-19 17:46:36,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:36,571 INFO L225 Difference]: With dead ends: 121 [2021-02-19 17:46:36,572 INFO L226 Difference]: Without dead ends: 121 [2021-02-19 17:46:36,572 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:46:36,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-02-19 17:46:36,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 91. [2021-02-19 17:46:36,573 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) [2021-02-19 17:46:36,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 197 transitions. [2021-02-19 17:46:36,573 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 197 transitions. Word has length 17 [2021-02-19 17:46:36,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:36,573 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 197 transitions. [2021-02-19 17:46:36,573 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) [2021-02-19 17:46:36,573 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 197 transitions. [2021-02-19 17:46:36,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:36,573 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:36,573 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:36,786 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable449,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:36,786 INFO L428 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:36,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:36,786 INFO L82 PathProgramCache]: Analyzing trace with hash 497649836, now seen corresponding path program 95 times [2021-02-19 17:46:36,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:36,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922180316] [2021-02-19 17:46:36,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:36,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:36,861 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:36,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922180316] [2021-02-19 17:46:36,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31582696] [2021-02-19 17:46:36,862 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) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:36,877 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:46:36,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:36,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:46:36,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:37,013 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:37,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:37,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-02-19 17:46:37,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322005192] [2021-02-19 17:46:37,014 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:46:37,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:37,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:46:37,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:46:37,014 INFO L87 Difference]: Start difference. First operand 91 states and 197 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) [2021-02-19 17:46:37,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:37,298 INFO L93 Difference]: Finished difference Result 100 states and 210 transitions. [2021-02-19 17:46:37,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:46:37,298 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 [2021-02-19 17:46:37,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:37,299 INFO L225 Difference]: With dead ends: 100 [2021-02-19 17:46:37,299 INFO L226 Difference]: Without dead ends: 94 [2021-02-19 17:46:37,299 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:46:37,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-02-19 17:46:37,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 91. [2021-02-19 17:46:37,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 2.1777777777777776) internal successors, (196), 90 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) [2021-02-19 17:46:37,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 196 transitions. [2021-02-19 17:46:37,300 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 196 transitions. Word has length 17 [2021-02-19 17:46:37,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:37,300 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 196 transitions. [2021-02-19 17:46:37,300 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) [2021-02-19 17:46:37,300 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 196 transitions. [2021-02-19 17:46:37,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:37,301 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:37,301 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:37,517 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable453 [2021-02-19 17:46:37,518 INFO L428 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:37,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:37,518 INFO L82 PathProgramCache]: Analyzing trace with hash 382296755, now seen corresponding path program 96 times [2021-02-19 17:46:37,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:37,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907985301] [2021-02-19 17:46:37,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:37,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:37,581 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:37,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907985301] [2021-02-19 17:46:37,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654594149] [2021-02-19 17:46:37,582 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) [2021-02-19 17:46:37,606 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:46:37,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:37,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2021-02-19 17:46:37,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:37,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:37,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:37,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:46:37,715 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:37,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:37,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:46:37,718 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:37,765 INFO L628 ElimStorePlain]: treesize reduction 76, result has 38.2 percent of original size [2021-02-19 17:46:37,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:37,767 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 18 treesize of output 14 [2021-02-19 17:46:37,768 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:37,784 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:37,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:37,787 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 12 treesize of output 8 [2021-02-19 17:46:37,788 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:46:37,803 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:37,803 INFO L518 ElimStorePlain]: Eliminatee v_prenex_84 vanished before elimination [2021-02-19 17:46:37,804 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:37,804 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-02-19 17:46:37,842 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:37,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:37,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-02-19 17:46:37,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280495662] [2021-02-19 17:46:37,843 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:46:37,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:37,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:46:37,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:46:37,843 INFO L87 Difference]: Start difference. First operand 91 states and 196 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) [2021-02-19 17:46:38,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:38,154 INFO L93 Difference]: Finished difference Result 132 states and 278 transitions. [2021-02-19 17:46:38,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:46:38,154 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 [2021-02-19 17:46:38,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:38,155 INFO L225 Difference]: With dead ends: 132 [2021-02-19 17:46:38,155 INFO L226 Difference]: Without dead ends: 132 [2021-02-19 17:46:38,155 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:46:38,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-02-19 17:46:38,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 91. [2021-02-19 17:46:38,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 2.1777777777777776) internal successors, (196), 90 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) [2021-02-19 17:46:38,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 196 transitions. [2021-02-19 17:46:38,156 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 196 transitions. Word has length 17 [2021-02-19 17:46:38,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:38,156 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 196 transitions. [2021-02-19 17:46:38,156 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) [2021-02-19 17:46:38,156 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 196 transitions. [2021-02-19 17:46:38,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:38,157 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:38,157 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:38,360 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable459 [2021-02-19 17:46:38,360 INFO L428 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:38,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:38,360 INFO L82 PathProgramCache]: Analyzing trace with hash -251286058, now seen corresponding path program 97 times [2021-02-19 17:46:38,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:38,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955115862] [2021-02-19 17:46:38,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:38,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:38,434 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:38,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955115862] [2021-02-19 17:46:38,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470077915] [2021-02-19 17:46:38,434 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 [2021-02-19 17:46:38,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:38,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:46:38,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:38,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:38,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:38,566 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 16 treesize of output 12 [2021-02-19 17:46:38,567 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:38,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:38,569 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 15 treesize of output 11 [2021-02-19 17:46:38,570 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:38,607 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-02-19 17:46:38,607 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:46:38,609 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 [2021-02-19 17:46:38,609 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:38,621 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:38,621 INFO L518 ElimStorePlain]: Eliminatee v_prenex_86 vanished before elimination [2021-02-19 17:46:38,622 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:38,622 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-02-19 17:46:38,657 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:38,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:38,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-02-19 17:46:38,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668940350] [2021-02-19 17:46:38,657 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:46:38,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:38,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:46:38,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:46:38,658 INFO L87 Difference]: Start difference. First operand 91 states and 196 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) [2021-02-19 17:46:39,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:39,043 INFO L93 Difference]: Finished difference Result 118 states and 241 transitions. [2021-02-19 17:46:39,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:46:39,043 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 [2021-02-19 17:46:39,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:39,044 INFO L225 Difference]: With dead ends: 118 [2021-02-19 17:46:39,044 INFO L226 Difference]: Without dead ends: 115 [2021-02-19 17:46:39,044 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:46:39,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-02-19 17:46:39,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 96. [2021-02-19 17:46:39,045 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) [2021-02-19 17:46:39,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 207 transitions. [2021-02-19 17:46:39,045 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 207 transitions. Word has length 17 [2021-02-19 17:46:39,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:39,045 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 207 transitions. [2021-02-19 17:46:39,045 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) [2021-02-19 17:46:39,045 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 207 transitions. [2021-02-19 17:46:39,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:39,046 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:39,046 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:39,260 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable463 [2021-02-19 17:46:39,260 INFO L428 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:39,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:39,261 INFO L82 PathProgramCache]: Analyzing trace with hash 140196716, now seen corresponding path program 98 times [2021-02-19 17:46:39,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:39,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576880408] [2021-02-19 17:46:39,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:39,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:39,338 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:39,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576880408] [2021-02-19 17:46:39,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629754179] [2021-02-19 17:46:39,339 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 [2021-02-19 17:46:39,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:46:39,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:39,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:46:39,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:39,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:39,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:39,470 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 [2021-02-19 17:46:39,471 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:39,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:39,474 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 [2021-02-19 17:46:39,475 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:39,517 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-02-19 17:46:39,517 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:46:39,519 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 [2021-02-19 17:46:39,520 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:39,534 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:39,534 INFO L518 ElimStorePlain]: Eliminatee v_prenex_90 vanished before elimination [2021-02-19 17:46:39,535 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:39,535 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-02-19 17:46:39,562 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:39,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:39,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-02-19 17:46:39,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339741738] [2021-02-19 17:46:39,563 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:46:39,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:39,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:46:39,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:46:39,563 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) [2021-02-19 17:46:39,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:39,811 INFO L93 Difference]: Finished difference Result 103 states and 220 transitions. [2021-02-19 17:46:39,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:46:39,811 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 [2021-02-19 17:46:39,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:39,811 INFO L225 Difference]: With dead ends: 103 [2021-02-19 17:46:39,811 INFO L226 Difference]: Without dead ends: 103 [2021-02-19 17:46:39,811 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:46:39,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-02-19 17:46:39,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 88. [2021-02-19 17:46:39,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 2.1839080459770117) internal successors, (190), 87 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) [2021-02-19 17:46:39,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 190 transitions. [2021-02-19 17:46:39,813 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 190 transitions. Word has length 17 [2021-02-19 17:46:39,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:39,813 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 190 transitions. [2021-02-19 17:46:39,813 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) [2021-02-19 17:46:39,813 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 190 transitions. [2021-02-19 17:46:39,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:39,813 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:39,813 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:40,025 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable471,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:40,026 INFO L428 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:40,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:40,026 INFO L82 PathProgramCache]: Analyzing trace with hash -340911365, now seen corresponding path program 99 times [2021-02-19 17:46:40,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:40,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087134790] [2021-02-19 17:46:40,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:40,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:40,088 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:40,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087134790] [2021-02-19 17:46:40,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972754647] [2021-02-19 17:46:40,088 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 [2021-02-19 17:46:40,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:46:40,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:40,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:46:40,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:40,223 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:40,223 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:40,223 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-02-19 17:46:40,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284186851] [2021-02-19 17:46:40,224 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:46:40,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:40,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:46:40,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:46:40,224 INFO L87 Difference]: Start difference. First operand 88 states and 190 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) [2021-02-19 17:46:40,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:40,357 INFO L93 Difference]: Finished difference Result 116 states and 246 transitions. [2021-02-19 17:46:40,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:46:40,357 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 [2021-02-19 17:46:40,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:40,357 INFO L225 Difference]: With dead ends: 116 [2021-02-19 17:46:40,357 INFO L226 Difference]: Without dead ends: 116 [2021-02-19 17:46:40,357 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:46:40,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-02-19 17:46:40,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 91. [2021-02-19 17:46:40,358 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) [2021-02-19 17:46:40,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 197 transitions. [2021-02-19 17:46:40,359 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 197 transitions. Word has length 17 [2021-02-19 17:46:40,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:40,359 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 197 transitions. [2021-02-19 17:46:40,359 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) [2021-02-19 17:46:40,359 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 197 transitions. [2021-02-19 17:46:40,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:40,359 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:40,359 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:40,559 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable478 [2021-02-19 17:46:40,559 INFO L428 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:40,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:40,560 INFO L82 PathProgramCache]: Analyzing trace with hash -574542996, now seen corresponding path program 100 times [2021-02-19 17:46:40,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:40,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768891571] [2021-02-19 17:46:40,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:40,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:40,639 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:40,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768891571] [2021-02-19 17:46:40,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25341491] [2021-02-19 17:46:40,640 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) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:40,657 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:46:40,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:40,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:46:40,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:40,764 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:40,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:40,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-02-19 17:46:40,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138840364] [2021-02-19 17:46:40,765 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:46:40,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:40,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:46:40,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:46:40,765 INFO L87 Difference]: Start difference. First operand 91 states and 197 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) [2021-02-19 17:46:40,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:40,949 INFO L93 Difference]: Finished difference Result 101 states and 212 transitions. [2021-02-19 17:46:40,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:46:40,950 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 [2021-02-19 17:46:40,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:40,950 INFO L225 Difference]: With dead ends: 101 [2021-02-19 17:46:40,950 INFO L226 Difference]: Without dead ends: 95 [2021-02-19 17:46:40,950 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:46:40,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-02-19 17:46:40,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 91. [2021-02-19 17:46:40,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 2.1777777777777776) internal successors, (196), 90 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) [2021-02-19 17:46:40,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 196 transitions. [2021-02-19 17:46:40,951 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 196 transitions. Word has length 17 [2021-02-19 17:46:40,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:40,952 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 196 transitions. [2021-02-19 17:46:40,952 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) [2021-02-19 17:46:40,952 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 196 transitions. [2021-02-19 17:46:40,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:40,952 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:40,952 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:41,162 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable482,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:41,162 INFO L428 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:41,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:41,162 INFO L82 PathProgramCache]: Analyzing trace with hash -484658393, now seen corresponding path program 101 times [2021-02-19 17:46:41,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:41,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202207360] [2021-02-19 17:46:41,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:41,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:41,236 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:41,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202207360] [2021-02-19 17:46:41,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429880966] [2021-02-19 17:46:41,237 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 [2021-02-19 17:46:41,253 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 17:46:41,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:41,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:46:41,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:41,382 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:41,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:41,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-02-19 17:46:41,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597617915] [2021-02-19 17:46:41,382 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:46:41,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:41,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:46:41,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:46:41,383 INFO L87 Difference]: Start difference. First operand 91 states and 196 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) [2021-02-19 17:46:41,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:41,626 INFO L93 Difference]: Finished difference Result 144 states and 295 transitions. [2021-02-19 17:46:41,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:46:41,626 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 [2021-02-19 17:46:41,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:41,626 INFO L225 Difference]: With dead ends: 144 [2021-02-19 17:46:41,626 INFO L226 Difference]: Without dead ends: 144 [2021-02-19 17:46:41,627 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:46:41,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-02-19 17:46:41,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 92. [2021-02-19 17:46:41,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.197802197802198) internal successors, (200), 91 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) [2021-02-19 17:46:41,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 200 transitions. [2021-02-19 17:46:41,628 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 200 transitions. Word has length 17 [2021-02-19 17:46:41,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:41,628 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 200 transitions. [2021-02-19 17:46:41,628 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) [2021-02-19 17:46:41,628 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 200 transitions. [2021-02-19 17:46:41,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:41,628 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:41,628 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:41,843 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable487 [2021-02-19 17:46:41,843 INFO L428 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:41,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:41,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1323478890, now seen corresponding path program 102 times [2021-02-19 17:46:41,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:41,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248092469] [2021-02-19 17:46:41,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:41,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:41,915 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:41,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248092469] [2021-02-19 17:46:41,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872324907] [2021-02-19 17:46:41,916 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) [2021-02-19 17:46:41,942 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:46:41,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:41,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:46:41,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:42,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:42,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:42,045 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 15 treesize of output 11 [2021-02-19 17:46:42,046 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:42,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:42,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:46:42,049 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:42,093 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-02-19 17:46:42,095 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 [2021-02-19 17:46:42,096 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:42,109 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:42,109 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:46:42,109 INFO L518 ElimStorePlain]: Eliminatee v_prenex_91 vanished before elimination [2021-02-19 17:46:42,111 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:42,111 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-02-19 17:46:42,140 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:42,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:42,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-02-19 17:46:42,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666691988] [2021-02-19 17:46:42,141 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:46:42,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:42,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:46:42,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:46:42,141 INFO L87 Difference]: Start difference. First operand 92 states and 200 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) [2021-02-19 17:46:42,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:42,376 INFO L93 Difference]: Finished difference Result 121 states and 247 transitions. [2021-02-19 17:46:42,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:46:42,377 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 [2021-02-19 17:46:42,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:42,377 INFO L225 Difference]: With dead ends: 121 [2021-02-19 17:46:42,377 INFO L226 Difference]: Without dead ends: 118 [2021-02-19 17:46:42,377 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:46:42,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-02-19 17:46:42,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 96. [2021-02-19 17:46:42,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.1894736842105265) internal successors, (208), 95 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) [2021-02-19 17:46:42,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 208 transitions. [2021-02-19 17:46:42,378 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 208 transitions. Word has length 17 [2021-02-19 17:46:42,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:42,379 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 208 transitions. [2021-02-19 17:46:42,379 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) [2021-02-19 17:46:42,379 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 208 transitions. [2021-02-19 17:46:42,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:42,379 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:42,379 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:42,579 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable499 [2021-02-19 17:46:42,579 INFO L428 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:42,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:42,580 INFO L82 PathProgramCache]: Analyzing trace with hash -2006053381, now seen corresponding path program 103 times [2021-02-19 17:46:42,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:42,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73562376] [2021-02-19 17:46:42,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:42,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:42,638 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:42,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73562376] [2021-02-19 17:46:42,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34910941] [2021-02-19 17:46:42,638 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 [2021-02-19 17:46:42,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:42,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:46:42,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:42,785 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:42,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:42,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-02-19 17:46:42,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309741089] [2021-02-19 17:46:42,786 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:46:42,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:42,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:46:42,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:46:42,786 INFO L87 Difference]: Start difference. First operand 96 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) [2021-02-19 17:46:42,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:42,939 INFO L93 Difference]: Finished difference Result 121 states and 255 transitions. [2021-02-19 17:46:42,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:46:42,939 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 [2021-02-19 17:46:42,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:42,940 INFO L225 Difference]: With dead ends: 121 [2021-02-19 17:46:42,940 INFO L226 Difference]: Without dead ends: 119 [2021-02-19 17:46:42,940 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:46:42,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-02-19 17:46:42,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 96. [2021-02-19 17:46:42,941 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) [2021-02-19 17:46:42,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 207 transitions. [2021-02-19 17:46:42,941 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 207 transitions. Word has length 17 [2021-02-19 17:46:42,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:42,941 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 207 transitions. [2021-02-19 17:46:42,941 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) [2021-02-19 17:46:42,941 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 207 transitions. [2021-02-19 17:46:42,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:42,941 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:42,941 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:43,150 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable507 [2021-02-19 17:46:43,150 INFO L428 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:43,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:43,150 INFO L82 PathProgramCache]: Analyzing trace with hash -931996116, now seen corresponding path program 104 times [2021-02-19 17:46:43,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:43,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114137464] [2021-02-19 17:46:43,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:43,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:43,221 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:43,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114137464] [2021-02-19 17:46:43,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942925933] [2021-02-19 17:46:43,221 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 [2021-02-19 17:46:43,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:46:43,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:43,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:46:43,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:43,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:43,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:43,331 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 15 treesize of output 11 [2021-02-19 17:46:43,332 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:43,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:43,334 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 16 treesize of output 12 [2021-02-19 17:46:43,335 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:43,373 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-02-19 17:46:43,375 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 [2021-02-19 17:46:43,376 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:43,388 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:43,388 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:46:43,388 INFO L518 ElimStorePlain]: Eliminatee v_prenex_95 vanished before elimination [2021-02-19 17:46:43,389 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:43,389 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-02-19 17:46:43,423 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:43,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:43,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-02-19 17:46:43,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208065546] [2021-02-19 17:46:43,424 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:46:43,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:43,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:46:43,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:46:43,424 INFO L87 Difference]: Start difference. First operand 96 states and 207 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) [2021-02-19 17:46:43,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:43,631 INFO L93 Difference]: Finished difference Result 104 states and 222 transitions. [2021-02-19 17:46:43,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:46:43,632 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 [2021-02-19 17:46:43,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:43,632 INFO L225 Difference]: With dead ends: 104 [2021-02-19 17:46:43,632 INFO L226 Difference]: Without dead ends: 104 [2021-02-19 17:46:43,632 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:46:43,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-02-19 17:46:43,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 90. [2021-02-19 17:46:43,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.1797752808988764) internal successors, (194), 89 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) [2021-02-19 17:46:43,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 194 transitions. [2021-02-19 17:46:43,633 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 194 transitions. Word has length 17 [2021-02-19 17:46:43,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:43,633 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 194 transitions. [2021-02-19 17:46:43,633 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) [2021-02-19 17:46:43,634 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 194 transitions. [2021-02-19 17:46:43,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:43,634 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:43,634 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:43,848 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable520 [2021-02-19 17:46:43,848 INFO L428 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:43,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:43,848 INFO L82 PathProgramCache]: Analyzing trace with hash -102150755, now seen corresponding path program 105 times [2021-02-19 17:46:43,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:43,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906792264] [2021-02-19 17:46:43,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:43,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:43,914 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:43,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906792264] [2021-02-19 17:46:43,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499950866] [2021-02-19 17:46:43,914 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 [2021-02-19 17:46:43,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:46:43,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:43,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2021-02-19 17:46:43,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:44,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:44,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:44,002 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 18 treesize of output 14 [2021-02-19 17:46:44,006 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:44,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:44,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:44,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:46:44,010 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:44,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:44,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:44,013 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 [2021-02-19 17:46:44,014 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:44,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:44,017 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 18 treesize of output 14 [2021-02-19 17:46:44,018 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:44,064 INFO L628 ElimStorePlain]: treesize reduction 67, result has 38.5 percent of original size [2021-02-19 17:46:44,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:44,066 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 12 treesize of output 8 [2021-02-19 17:46:44,068 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:46:44,085 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:44,086 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:44,086 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:133, output treesize:22 [2021-02-19 17:46:44,127 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:44,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:44,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-02-19 17:46:44,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530678114] [2021-02-19 17:46:44,128 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:46:44,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:44,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:46:44,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:46:44,128 INFO L87 Difference]: Start difference. First operand 90 states and 194 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) [2021-02-19 17:46:44,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:44,319 INFO L93 Difference]: Finished difference Result 127 states and 261 transitions. [2021-02-19 17:46:44,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:46:44,319 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 [2021-02-19 17:46:44,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:44,319 INFO L225 Difference]: With dead ends: 127 [2021-02-19 17:46:44,319 INFO L226 Difference]: Without dead ends: 127 [2021-02-19 17:46:44,319 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:46:44,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-02-19 17:46:44,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 91. [2021-02-19 17:46:44,321 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) [2021-02-19 17:46:44,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 197 transitions. [2021-02-19 17:46:44,321 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 197 transitions. Word has length 17 [2021-02-19 17:46:44,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:44,321 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 197 transitions. [2021-02-19 17:46:44,321 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) [2021-02-19 17:46:44,321 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 197 transitions. [2021-02-19 17:46:44,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:44,321 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:44,321 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:44,521 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable527,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:44,522 INFO L428 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:44,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:44,522 INFO L82 PathProgramCache]: Analyzing trace with hash -735733568, now seen corresponding path program 106 times [2021-02-19 17:46:44,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:44,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680271261] [2021-02-19 17:46:44,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:44,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:44,583 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:44,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680271261] [2021-02-19 17:46:44,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022601708] [2021-02-19 17:46:44,583 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 [2021-02-19 17:46:44,599 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:46:44,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:44,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:46:44,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:44,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:44,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:44,691 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 16 treesize of output 12 [2021-02-19 17:46:44,692 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:44,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:44,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:44,695 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 16 treesize of output 12 [2021-02-19 17:46:44,696 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:44,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:44,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:44,698 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 17 treesize of output 13 [2021-02-19 17:46:44,699 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:44,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:44,702 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 15 treesize of output 11 [2021-02-19 17:46:44,702 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:44,733 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-02-19 17:46:44,733 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:46:44,734 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:44,734 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-02-19 17:46:44,759 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:44,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:44,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-02-19 17:46:44,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843250301] [2021-02-19 17:46:44,760 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:46:44,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:44,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:46:44,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:46:44,760 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) [2021-02-19 17:46:44,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:44,964 INFO L93 Difference]: Finished difference Result 132 states and 268 transitions. [2021-02-19 17:46:44,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:46:44,965 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 [2021-02-19 17:46:44,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:44,965 INFO L225 Difference]: With dead ends: 132 [2021-02-19 17:46:44,965 INFO L226 Difference]: Without dead ends: 129 [2021-02-19 17:46:44,965 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:46:44,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-02-19 17:46:44,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 97. [2021-02-19 17:46:44,966 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) [2021-02-19 17:46:44,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 211 transitions. [2021-02-19 17:46:44,966 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 211 transitions. Word has length 17 [2021-02-19 17:46:44,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:44,966 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 211 transitions. [2021-02-19 17:46:44,966 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) [2021-02-19 17:46:44,966 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 211 transitions. [2021-02-19 17:46:44,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:44,967 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:44,967 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:45,181 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable531,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:45,181 INFO L428 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:45,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:45,181 INFO L82 PathProgramCache]: Analyzing trace with hash -344250794, now seen corresponding path program 107 times [2021-02-19 17:46:45,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:45,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131111395] [2021-02-19 17:46:45,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:45,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:45,246 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:45,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131111395] [2021-02-19 17:46:45,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598928273] [2021-02-19 17:46:45,247 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) [2021-02-19 17:46:45,281 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 17:46:45,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:45,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:46:45,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:45,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:45,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:45,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:46:45,376 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:45,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:45,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:45,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:46:45,380 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:45,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:45,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:45,382 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 16 treesize of output 12 [2021-02-19 17:46:45,383 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:45,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:45,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:46:45,386 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:45,421 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-02-19 17:46:45,421 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:46:45,422 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:45,422 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-02-19 17:46:45,449 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:45,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:45,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-02-19 17:46:45,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101479965] [2021-02-19 17:46:45,449 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:46:45,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:45,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:46:45,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:46:45,450 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) [2021-02-19 17:46:45,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:45,670 INFO L93 Difference]: Finished difference Result 135 states and 277 transitions. [2021-02-19 17:46:45,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:46:45,670 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 [2021-02-19 17:46:45,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:45,671 INFO L225 Difference]: With dead ends: 135 [2021-02-19 17:46:45,671 INFO L226 Difference]: Without dead ends: 135 [2021-02-19 17:46:45,671 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:46:45,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-02-19 17:46:45,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 96. [2021-02-19 17:46:45,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.2) internal successors, (209), 95 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) [2021-02-19 17:46:45,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 209 transitions. [2021-02-19 17:46:45,672 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 209 transitions. Word has length 17 [2021-02-19 17:46:45,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:45,672 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 209 transitions. [2021-02-19 17:46:45,672 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) [2021-02-19 17:46:45,672 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 209 transitions. [2021-02-19 17:46:45,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:45,672 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:45,672 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:45,873 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable544 [2021-02-19 17:46:45,873 INFO L428 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:45,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:45,873 INFO L82 PathProgramCache]: Analyzing trace with hash 730488477, now seen corresponding path program 108 times [2021-02-19 17:46:45,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:45,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641625765] [2021-02-19 17:46:45,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:45,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:45,953 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:45,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641625765] [2021-02-19 17:46:45,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243177124] [2021-02-19 17:46:45,954 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) [2021-02-19 17:46:45,973 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-02-19 17:46:45,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:45,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:46:45,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:46,061 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:46,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:46,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-02-19 17:46:46,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099143681] [2021-02-19 17:46:46,062 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:46:46,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:46,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:46:46,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:46:46,062 INFO L87 Difference]: Start difference. First operand 96 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) [2021-02-19 17:46:46,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:46,254 INFO L93 Difference]: Finished difference Result 103 states and 219 transitions. [2021-02-19 17:46:46,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:46:46,255 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 [2021-02-19 17:46:46,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:46,255 INFO L225 Difference]: With dead ends: 103 [2021-02-19 17:46:46,255 INFO L226 Difference]: Without dead ends: 99 [2021-02-19 17:46:46,255 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:46:46,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-02-19 17:46:46,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 96. [2021-02-19 17:46:46,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.1894736842105265) internal successors, (208), 95 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) [2021-02-19 17:46:46,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 208 transitions. [2021-02-19 17:46:46,257 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 208 transitions. Word has length 17 [2021-02-19 17:46:46,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:46,257 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 208 transitions. [2021-02-19 17:46:46,257 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) [2021-02-19 17:46:46,257 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 208 transitions. [2021-02-19 17:46:46,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:46,257 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:46,257 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:46,470 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable554 [2021-02-19 17:46:46,470 INFO L428 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:46,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:46,470 INFO L82 PathProgramCache]: Analyzing trace with hash -879480596, now seen corresponding path program 109 times [2021-02-19 17:46:46,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:46,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501454773] [2021-02-19 17:46:46,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:46,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:46,539 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:46,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501454773] [2021-02-19 17:46:46,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362708780] [2021-02-19 17:46:46,539 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 [2021-02-19 17:46:46,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:46,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:46:46,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:46,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:46,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:46,640 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 16 treesize of output 12 [2021-02-19 17:46:46,641 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:46,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:46,643 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 15 treesize of output 11 [2021-02-19 17:46:46,643 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:46,657 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-02-19 17:46:46,657 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:46:46,657 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:46:46,657 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-02-19 17:46:46,664 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:46,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:46,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-02-19 17:46:46,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79630352] [2021-02-19 17:46:46,664 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:46:46,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:46,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:46:46,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:46:46,664 INFO L87 Difference]: Start difference. First operand 96 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) [2021-02-19 17:46:46,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:46,785 INFO L93 Difference]: Finished difference Result 112 states and 238 transitions. [2021-02-19 17:46:46,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:46:46,785 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 [2021-02-19 17:46:46,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:46,785 INFO L225 Difference]: With dead ends: 112 [2021-02-19 17:46:46,785 INFO L226 Difference]: Without dead ends: 112 [2021-02-19 17:46:46,786 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:46:46,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-02-19 17:46:46,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 89. [2021-02-19 17:46:46,786 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) [2021-02-19 17:46:46,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 192 transitions. [2021-02-19 17:46:46,787 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 192 transitions. Word has length 17 [2021-02-19 17:46:46,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:46,787 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 192 transitions. [2021-02-19 17:46:46,787 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) [2021-02-19 17:46:46,787 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 192 transitions. [2021-02-19 17:46:46,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:46,787 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:46,787 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:47,001 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable558 [2021-02-19 17:46:47,002 INFO L428 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:47,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:47,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1143322727, now seen corresponding path program 110 times [2021-02-19 17:46:47,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:47,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168759925] [2021-02-19 17:46:47,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:47,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:47,087 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:47,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168759925] [2021-02-19 17:46:47,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257593564] [2021-02-19 17:46:47,088 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 [2021-02-19 17:46:47,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:46:47,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:47,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:46:47,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:47,235 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:47,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:47,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-02-19 17:46:47,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181877638] [2021-02-19 17:46:47,236 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:46:47,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:47,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:46:47,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:46:47,236 INFO L87 Difference]: Start difference. First operand 89 states and 192 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) [2021-02-19 17:46:47,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:47,522 INFO L93 Difference]: Finished difference Result 125 states and 257 transitions. [2021-02-19 17:46:47,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:46:47,522 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 [2021-02-19 17:46:47,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:47,522 INFO L225 Difference]: With dead ends: 125 [2021-02-19 17:46:47,522 INFO L226 Difference]: Without dead ends: 125 [2021-02-19 17:46:47,523 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:46:47,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-02-19 17:46:47,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 92. [2021-02-19 17:46:47,524 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) [2021-02-19 17:46:47,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 202 transitions. [2021-02-19 17:46:47,524 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 202 transitions. Word has length 17 [2021-02-19 17:46:47,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:47,524 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 202 transitions. [2021-02-19 17:46:47,524 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) [2021-02-19 17:46:47,524 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 202 transitions. [2021-02-19 17:46:47,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:47,524 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:47,524 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:47,738 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable562 [2021-02-19 17:46:47,738 INFO L428 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:47,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:47,738 INFO L82 PathProgramCache]: Analyzing trace with hash 304502230, now seen corresponding path program 111 times [2021-02-19 17:46:47,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:47,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111202955] [2021-02-19 17:46:47,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:47,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:47,791 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:47,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111202955] [2021-02-19 17:46:47,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616312634] [2021-02-19 17:46:47,792 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 [2021-02-19 17:46:47,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:46:47,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:47,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:46:47,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:47,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:47,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:47,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:46:47,905 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:47,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:47,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:47,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:46:47,909 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:47,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:47,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:47,911 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 16 treesize of output 12 [2021-02-19 17:46:47,912 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:47,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:47,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:46:47,915 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:47,945 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-02-19 17:46:47,945 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:46:47,946 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:47,946 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-02-19 17:46:47,971 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:47,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:47,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-02-19 17:46:47,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601207340] [2021-02-19 17:46:47,971 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:46:47,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:47,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:46:47,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:46:47,971 INFO L87 Difference]: Start difference. First operand 92 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) [2021-02-19 17:46:48,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:48,214 INFO L93 Difference]: Finished difference Result 130 states and 265 transitions. [2021-02-19 17:46:48,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:46:48,214 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 [2021-02-19 17:46:48,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:48,215 INFO L225 Difference]: With dead ends: 130 [2021-02-19 17:46:48,215 INFO L226 Difference]: Without dead ends: 127 [2021-02-19 17:46:48,215 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:46:48,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-02-19 17:46:48,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 98. [2021-02-19 17:46:48,216 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) [2021-02-19 17:46:48,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 216 transitions. [2021-02-19 17:46:48,216 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 216 transitions. Word has length 17 [2021-02-19 17:46:48,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:48,216 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 216 transitions. [2021-02-19 17:46:48,216 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) [2021-02-19 17:46:48,216 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 216 transitions. [2021-02-19 17:46:48,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:48,217 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:48,217 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:48,430 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable572 [2021-02-19 17:46:48,430 INFO L428 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:48,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:48,430 INFO L82 PathProgramCache]: Analyzing trace with hash -378072261, now seen corresponding path program 112 times [2021-02-19 17:46:48,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:48,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713110297] [2021-02-19 17:46:48,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:48,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:48,502 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:48,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713110297] [2021-02-19 17:46:48,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747555028] [2021-02-19 17:46:48,502 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 [2021-02-19 17:46:48,519 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:46:48,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:48,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:46:48,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:48,638 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:48,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:48,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-02-19 17:46:48,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761182949] [2021-02-19 17:46:48,638 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:46:48,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:48,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:46:48,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:46:48,639 INFO L87 Difference]: Start difference. First operand 98 states and 216 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) [2021-02-19 17:46:48,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:48,958 INFO L93 Difference]: Finished difference Result 130 states and 267 transitions. [2021-02-19 17:46:48,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:46:48,958 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 [2021-02-19 17:46:48,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:48,959 INFO L225 Difference]: With dead ends: 130 [2021-02-19 17:46:48,959 INFO L226 Difference]: Without dead ends: 128 [2021-02-19 17:46:48,959 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:46:48,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-02-19 17:46:48,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 98. [2021-02-19 17:46:48,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.216494845360825) internal successors, (215), 97 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:48,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 215 transitions. [2021-02-19 17:46:48,960 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 215 transitions. Word has length 17 [2021-02-19 17:46:48,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:48,960 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 215 transitions. [2021-02-19 17:46:48,960 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) [2021-02-19 17:46:48,960 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 215 transitions. [2021-02-19 17:46:48,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:48,960 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:48,960 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:49,161 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable583,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:49,161 INFO L428 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:49,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:49,161 INFO L82 PathProgramCache]: Analyzing trace with hash 695985004, now seen corresponding path program 113 times [2021-02-19 17:46:49,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:49,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131679980] [2021-02-19 17:46:49,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:49,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:49,217 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:49,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131679980] [2021-02-19 17:46:49,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080012057] [2021-02-19 17:46:49,217 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) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:49,235 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 17:46:49,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:49,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:46:49,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:49,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:49,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:49,333 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 [2021-02-19 17:46:49,334 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:49,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:49,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:49,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:46:49,337 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:49,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:49,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:49,340 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 16 treesize of output 12 [2021-02-19 17:46:49,341 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:49,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:49,343 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 16 treesize of output 12 [2021-02-19 17:46:49,344 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:49,374 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-02-19 17:46:49,375 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:46:49,376 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:49,376 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-02-19 17:46:49,399 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:49,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:49,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-02-19 17:46:49,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572593142] [2021-02-19 17:46:49,400 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:46:49,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:49,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:46:49,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:46:49,400 INFO L87 Difference]: Start difference. First operand 98 states and 215 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) [2021-02-19 17:46:49,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:49,702 INFO L93 Difference]: Finished difference Result 133 states and 273 transitions. [2021-02-19 17:46:49,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:46:49,702 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 [2021-02-19 17:46:49,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:49,702 INFO L225 Difference]: With dead ends: 133 [2021-02-19 17:46:49,702 INFO L226 Difference]: Without dead ends: 133 [2021-02-19 17:46:49,702 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:46:49,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-02-19 17:46:49,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 97. [2021-02-19 17:46:49,703 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) [2021-02-19 17:46:49,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 213 transitions. [2021-02-19 17:46:49,704 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 213 transitions. Word has length 17 [2021-02-19 17:46:49,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:49,704 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 213 transitions. [2021-02-19 17:46:49,704 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) [2021-02-19 17:46:49,704 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 213 transitions. [2021-02-19 17:46:49,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:49,704 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:49,704 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:49,904 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable595 [2021-02-19 17:46:49,904 INFO L428 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:49,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:49,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1770724275, now seen corresponding path program 114 times [2021-02-19 17:46:49,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:49,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055049058] [2021-02-19 17:46:49,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:49,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:49,978 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:49,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055049058] [2021-02-19 17:46:49,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338748141] [2021-02-19 17:46:49,978 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 [2021-02-19 17:46:49,994 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-02-19 17:46:49,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:49,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:46:49,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:50,091 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:50,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:50,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-02-19 17:46:50,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499491714] [2021-02-19 17:46:50,092 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:46:50,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:50,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:46:50,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:46:50,092 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) [2021-02-19 17:46:50,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:50,348 INFO L93 Difference]: Finished difference Result 108 states and 229 transitions. [2021-02-19 17:46:50,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:46:50,349 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 [2021-02-19 17:46:50,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:50,349 INFO L225 Difference]: With dead ends: 108 [2021-02-19 17:46:50,349 INFO L226 Difference]: Without dead ends: 104 [2021-02-19 17:46:50,349 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:46:50,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-02-19 17:46:50,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 97. [2021-02-19 17:46:50,350 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) [2021-02-19 17:46:50,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 212 transitions. [2021-02-19 17:46:50,350 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 212 transitions. Word has length 17 [2021-02-19 17:46:50,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:50,350 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 212 transitions. [2021-02-19 17:46:50,350 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) [2021-02-19 17:46:50,351 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 212 transitions. [2021-02-19 17:46:50,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:50,351 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:50,351 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:50,551 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable605,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:50,551 INFO L428 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:50,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:50,551 INFO L82 PathProgramCache]: Analyzing trace with hash 160755202, now seen corresponding path program 115 times [2021-02-19 17:46:50,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:50,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997531717] [2021-02-19 17:46:50,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:50,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:50,612 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:50,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997531717] [2021-02-19 17:46:50,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704767631] [2021-02-19 17:46:50,612 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 [2021-02-19 17:46:50,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:50,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:46:50,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:50,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:50,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:50,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:46:50,726 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:50,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:50,728 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 [2021-02-19 17:46:50,729 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:50,743 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-02-19 17:46:50,743 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:46:50,743 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:46:50,744 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-02-19 17:46:50,750 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:50,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:50,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-02-19 17:46:50,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243306215] [2021-02-19 17:46:50,750 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:46:50,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:50,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:46:50,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:46:50,751 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) [2021-02-19 17:46:50,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:50,968 INFO L93 Difference]: Finished difference Result 120 states and 254 transitions. [2021-02-19 17:46:50,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:46:50,968 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 [2021-02-19 17:46:50,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:50,969 INFO L225 Difference]: With dead ends: 120 [2021-02-19 17:46:50,969 INFO L226 Difference]: Without dead ends: 120 [2021-02-19 17:46:50,969 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:46:50,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-02-19 17:46:50,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 96. [2021-02-19 17:46:50,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.210526315789474) internal successors, (210), 95 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) [2021-02-19 17:46:50,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 210 transitions. [2021-02-19 17:46:50,970 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 210 transitions. Word has length 17 [2021-02-19 17:46:50,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:50,970 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 210 transitions. [2021-02-19 17:46:50,970 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) [2021-02-19 17:46:50,970 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 210 transitions. [2021-02-19 17:46:50,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:50,970 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:50,970 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:51,171 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable609,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:51,171 INFO L428 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:51,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:51,171 INFO L82 PathProgramCache]: Analyzing trace with hash -336059845, now seen corresponding path program 116 times [2021-02-19 17:46:51,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:51,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231541364] [2021-02-19 17:46:51,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:51,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:51,249 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:51,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231541364] [2021-02-19 17:46:51,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576333084] [2021-02-19 17:46:51,249 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 [2021-02-19 17:46:51,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:46:51,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:51,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:46:51,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:51,353 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:51,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:51,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-02-19 17:46:51,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450154784] [2021-02-19 17:46:51,354 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:46:51,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:51,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:46:51,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:46:51,354 INFO L87 Difference]: Start difference. First operand 96 states and 210 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) [2021-02-19 17:46:51,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:51,545 INFO L93 Difference]: Finished difference Result 105 states and 223 transitions. [2021-02-19 17:46:51,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:46:51,546 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 [2021-02-19 17:46:51,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:51,546 INFO L225 Difference]: With dead ends: 105 [2021-02-19 17:46:51,546 INFO L226 Difference]: Without dead ends: 99 [2021-02-19 17:46:51,546 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:46:51,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-02-19 17:46:51,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 96. [2021-02-19 17:46:51,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.2) internal successors, (209), 95 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) [2021-02-19 17:46:51,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 209 transitions. [2021-02-19 17:46:51,547 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 209 transitions. Word has length 17 [2021-02-19 17:46:51,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:51,547 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 209 transitions. [2021-02-19 17:46:51,547 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) [2021-02-19 17:46:51,547 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 209 transitions. [2021-02-19 17:46:51,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:51,548 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:51,548 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:51,748 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable613,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:51,748 INFO L428 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:51,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:51,748 INFO L82 PathProgramCache]: Analyzing trace with hash 748500524, now seen corresponding path program 117 times [2021-02-19 17:46:51,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:51,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162792369] [2021-02-19 17:46:51,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:51,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:51,818 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:51,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162792369] [2021-02-19 17:46:51,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023505208] [2021-02-19 17:46:51,819 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 [2021-02-19 17:46:51,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:46:51,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:51,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2021-02-19 17:46:51,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:51,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:51,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:51,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:46:51,915 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:51,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:51,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:46:51,918 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:51,936 INFO L628 ElimStorePlain]: treesize reduction 30, result has 43.4 percent of original size [2021-02-19 17:46:51,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:51,939 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 9 treesize of output 5 [2021-02-19 17:46:51,940 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:46:51,945 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:51,946 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:46:51,946 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:67, output treesize:9 [2021-02-19 17:46:51,964 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:51,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:51,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-02-19 17:46:51,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656263221] [2021-02-19 17:46:51,964 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:46:51,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:51,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:46:51,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:46:51,964 INFO L87 Difference]: Start difference. First operand 96 states and 209 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) [2021-02-19 17:46:52,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:52,058 INFO L93 Difference]: Finished difference Result 108 states and 230 transitions. [2021-02-19 17:46:52,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:46:52,059 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 [2021-02-19 17:46:52,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:52,060 INFO L225 Difference]: With dead ends: 108 [2021-02-19 17:46:52,060 INFO L226 Difference]: Without dead ends: 108 [2021-02-19 17:46:52,060 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:46:52,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-02-19 17:46:52,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 91. [2021-02-19 17:46:52,061 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) [2021-02-19 17:46:52,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 197 transitions. [2021-02-19 17:46:52,061 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 197 transitions. Word has length 17 [2021-02-19 17:46:52,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:52,061 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 197 transitions. [2021-02-19 17:46:52,061 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) [2021-02-19 17:46:52,061 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 197 transitions. [2021-02-19 17:46:52,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:52,061 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:52,062 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:52,262 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable617,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:52,262 INFO L428 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:52,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:52,262 INFO L82 PathProgramCache]: Analyzing trace with hash 354979183, now seen corresponding path program 118 times [2021-02-19 17:46:52,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:52,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602382272] [2021-02-19 17:46:52,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:52,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:52,317 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:52,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602382272] [2021-02-19 17:46:52,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526906892] [2021-02-19 17:46:52,318 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 [2021-02-19 17:46:52,334 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:46:52,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:52,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:46:52,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:52,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:52,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:52,446 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 15 treesize of output 11 [2021-02-19 17:46:52,447 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:52,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:52,449 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 16 treesize of output 12 [2021-02-19 17:46:52,450 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:52,464 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-02-19 17:46:52,464 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:46:52,465 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:46:52,465 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-02-19 17:46:52,479 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:52,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:52,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-02-19 17:46:52,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259517144] [2021-02-19 17:46:52,480 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:46:52,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:52,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:46:52,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:46:52,480 INFO L87 Difference]: Start difference. First operand 91 states and 197 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) [2021-02-19 17:46:52,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:52,574 INFO L93 Difference]: Finished difference Result 106 states and 226 transitions. [2021-02-19 17:46:52,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:46:52,574 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 [2021-02-19 17:46:52,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:52,574 INFO L225 Difference]: With dead ends: 106 [2021-02-19 17:46:52,574 INFO L226 Difference]: Without dead ends: 106 [2021-02-19 17:46:52,575 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:46:52,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-02-19 17:46:52,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 91. [2021-02-19 17:46:52,576 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) [2021-02-19 17:46:52,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 197 transitions. [2021-02-19 17:46:52,576 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 197 transitions. Word has length 17 [2021-02-19 17:46:52,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:52,576 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 197 transitions. [2021-02-19 17:46:52,576 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) [2021-02-19 17:46:52,576 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 197 transitions. [2021-02-19 17:46:52,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:52,576 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:52,576 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:52,776 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable618,119 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:52,777 INFO L428 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:52,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:52,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1702333214, now seen corresponding path program 119 times [2021-02-19 17:46:52,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:52,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591912838] [2021-02-19 17:46:52,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:52,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:52,857 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:52,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591912838] [2021-02-19 17:46:52,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978029242] [2021-02-19 17:46:52,857 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) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:52,892 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:46:52,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:52,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:46:52,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:52,995 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:52,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:52,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-02-19 17:46:52,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141325683] [2021-02-19 17:46:52,995 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:46:52,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:52,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:46:52,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:46:52,996 INFO L87 Difference]: Start difference. First operand 91 states and 197 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) [2021-02-19 17:46:53,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:53,192 INFO L93 Difference]: Finished difference Result 100 states and 209 transitions. [2021-02-19 17:46:53,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:46:53,192 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 [2021-02-19 17:46:53,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:53,192 INFO L225 Difference]: With dead ends: 100 [2021-02-19 17:46:53,193 INFO L226 Difference]: Without dead ends: 91 [2021-02-19 17:46:53,193 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:46:53,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-02-19 17:46:53,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2021-02-19 17:46:53,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 2.1777777777777776) internal successors, (196), 90 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) [2021-02-19 17:46:53,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 196 transitions. [2021-02-19 17:46:53,194 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 196 transitions. Word has length 17 [2021-02-19 17:46:53,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:53,194 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 196 transitions. [2021-02-19 17:46:53,194 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) [2021-02-19 17:46:53,194 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 196 transitions. [2021-02-19 17:46:53,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:53,194 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:53,194 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:53,394 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable622,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:53,394 INFO L428 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:53,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:53,395 INFO L82 PathProgramCache]: Analyzing trace with hash 193788611, now seen corresponding path program 120 times [2021-02-19 17:46:53,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:53,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485974743] [2021-02-19 17:46:53,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:53,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:53,457 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:53,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485974743] [2021-02-19 17:46:53,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346129853] [2021-02-19 17:46:53,457 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 [2021-02-19 17:46:53,474 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:46:53,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:53,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2021-02-19 17:46:53,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:53,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:53,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:53,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:46:53,565 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:53,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:53,567 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 17 treesize of output 13 [2021-02-19 17:46:53,568 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:53,584 INFO L628 ElimStorePlain]: treesize reduction 38, result has 30.9 percent of original size [2021-02-19 17:46:53,585 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:46:53,594 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:46:53,594 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:67, output treesize:9 [2021-02-19 17:46:53,610 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:53,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:53,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-02-19 17:46:53,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142213156] [2021-02-19 17:46:53,611 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:46:53,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:53,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:46:53,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:46:53,611 INFO L87 Difference]: Start difference. First operand 91 states and 196 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) [2021-02-19 17:46:53,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:53,864 INFO L93 Difference]: Finished difference Result 119 states and 252 transitions. [2021-02-19 17:46:53,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:46:53,865 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 [2021-02-19 17:46:53,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:53,865 INFO L225 Difference]: With dead ends: 119 [2021-02-19 17:46:53,865 INFO L226 Difference]: Without dead ends: 119 [2021-02-19 17:46:53,865 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:46:53,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-02-19 17:46:53,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 92. [2021-02-19 17:46:53,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.1868131868131866) internal successors, (199), 91 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) [2021-02-19 17:46:53,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 199 transitions. [2021-02-19 17:46:53,867 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 199 transitions. Word has length 17 [2021-02-19 17:46:53,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:53,867 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 199 transitions. [2021-02-19 17:46:53,867 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) [2021-02-19 17:46:53,867 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 199 transitions. [2021-02-19 17:46:53,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:53,867 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:53,867 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:54,067 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable626,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:54,067 INFO L428 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:54,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:54,068 INFO L82 PathProgramCache]: Analyzing trace with hash -39843020, now seen corresponding path program 121 times [2021-02-19 17:46:54,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:54,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190984532] [2021-02-19 17:46:54,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:54,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:54,143 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:54,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190984532] [2021-02-19 17:46:54,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449608980] [2021-02-19 17:46:54,144 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 [2021-02-19 17:46:54,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:54,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:46:54,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:54,260 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:54,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:54,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-02-19 17:46:54,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615594225] [2021-02-19 17:46:54,261 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:46:54,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:54,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:46:54,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:46:54,261 INFO L87 Difference]: Start difference. First operand 92 states and 199 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) [2021-02-19 17:46:54,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:54,506 INFO L93 Difference]: Finished difference Result 98 states and 206 transitions. [2021-02-19 17:46:54,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:46:54,506 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 [2021-02-19 17:46:54,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:54,507 INFO L225 Difference]: With dead ends: 98 [2021-02-19 17:46:54,507 INFO L226 Difference]: Without dead ends: 92 [2021-02-19 17:46:54,507 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:46:54,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-02-19 17:46:54,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2021-02-19 17:46:54,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.1758241758241756) internal successors, (198), 91 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) [2021-02-19 17:46:54,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 198 transitions. [2021-02-19 17:46:54,508 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 198 transitions. Word has length 17 [2021-02-19 17:46:54,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:54,508 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 198 transitions. [2021-02-19 17:46:54,508 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) [2021-02-19 17:46:54,508 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 198 transitions. [2021-02-19 17:46:54,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:54,509 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:54,510 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:54,714 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable627 [2021-02-19 17:46:54,714 INFO L428 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:54,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:54,714 INFO L82 PathProgramCache]: Analyzing trace with hash -155196101, now seen corresponding path program 122 times [2021-02-19 17:46:54,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:54,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374254606] [2021-02-19 17:46:54,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:54,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:54,794 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:54,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374254606] [2021-02-19 17:46:54,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440635717] [2021-02-19 17:46:54,795 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 [2021-02-19 17:46:54,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:46:54,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:54,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:46:54,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:54,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:54,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:54,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:46:54,922 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:54,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:54,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:54,925 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 15 treesize of output 11 [2021-02-19 17:46:54,925 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:54,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:54,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:54,928 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 17 treesize of output 13 [2021-02-19 17:46:54,929 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:54,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:54,931 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 16 treesize of output 12 [2021-02-19 17:46:54,932 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:54,963 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-02-19 17:46:54,963 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:46:54,964 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:54,964 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-02-19 17:46:54,988 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:54,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:54,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-02-19 17:46:54,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846508331] [2021-02-19 17:46:54,989 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:46:54,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:54,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:46:54,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:46:54,989 INFO L87 Difference]: Start difference. First operand 92 states and 198 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) [2021-02-19 17:46:55,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:55,267 INFO L93 Difference]: Finished difference Result 124 states and 262 transitions. [2021-02-19 17:46:55,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:46:55,267 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 [2021-02-19 17:46:55,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:55,268 INFO L225 Difference]: With dead ends: 124 [2021-02-19 17:46:55,268 INFO L226 Difference]: Without dead ends: 124 [2021-02-19 17:46:55,268 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:46:55,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-02-19 17:46:55,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 92. [2021-02-19 17:46:55,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.1758241758241756) internal successors, (198), 91 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) [2021-02-19 17:46:55,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 198 transitions. [2021-02-19 17:46:55,269 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 198 transitions. Word has length 17 [2021-02-19 17:46:55,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:55,269 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 198 transitions. [2021-02-19 17:46:55,269 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) [2021-02-19 17:46:55,269 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 198 transitions. [2021-02-19 17:46:55,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:55,269 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:55,269 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:55,474 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 123 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable631 [2021-02-19 17:46:55,474 INFO L428 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:55,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:55,474 INFO L82 PathProgramCache]: Analyzing trace with hash -788778914, now seen corresponding path program 123 times [2021-02-19 17:46:55,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:55,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918689419] [2021-02-19 17:46:55,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:55,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:55,548 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:55,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918689419] [2021-02-19 17:46:55,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192740264] [2021-02-19 17:46:55,548 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 [2021-02-19 17:46:55,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:46:55,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:55,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:46:55,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:55,715 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:55,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:55,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-02-19 17:46:55,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920595631] [2021-02-19 17:46:55,716 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:46:55,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:55,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:46:55,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:46:55,716 INFO L87 Difference]: Start difference. First operand 92 states and 198 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) [2021-02-19 17:46:56,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:56,060 INFO L93 Difference]: Finished difference Result 117 states and 239 transitions. [2021-02-19 17:46:56,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:46:56,061 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 [2021-02-19 17:46:56,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:56,061 INFO L225 Difference]: With dead ends: 117 [2021-02-19 17:46:56,061 INFO L226 Difference]: Without dead ends: 114 [2021-02-19 17:46:56,061 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:46:56,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-02-19 17:46:56,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 97. [2021-02-19 17:46:56,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.1770833333333335) internal successors, (209), 96 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) [2021-02-19 17:46:56,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 209 transitions. [2021-02-19 17:46:56,062 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 209 transitions. Word has length 17 [2021-02-19 17:46:56,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:56,063 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 209 transitions. [2021-02-19 17:46:56,063 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) [2021-02-19 17:46:56,063 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 209 transitions. [2021-02-19 17:46:56,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:56,063 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:56,063 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:56,263 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable643 [2021-02-19 17:46:56,263 INFO L428 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:56,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:56,263 INFO L82 PathProgramCache]: Analyzing trace with hash -397296140, now seen corresponding path program 124 times [2021-02-19 17:46:56,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:56,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070357462] [2021-02-19 17:46:56,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:56,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:56,338 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:56,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070357462] [2021-02-19 17:46:56,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162663996] [2021-02-19 17:46:56,338 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 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 [2021-02-19 17:46:56,354 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:46:56,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:56,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:46:56,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:56,477 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:56,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:56,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-02-19 17:46:56,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500910717] [2021-02-19 17:46:56,478 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:46:56,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:56,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:46:56,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:46:56,478 INFO L87 Difference]: Start difference. First operand 97 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) [2021-02-19 17:46:56,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:56,683 INFO L93 Difference]: Finished difference Result 102 states and 218 transitions. [2021-02-19 17:46:56,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:46:56,683 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 [2021-02-19 17:46:56,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:56,684 INFO L225 Difference]: With dead ends: 102 [2021-02-19 17:46:56,684 INFO L226 Difference]: Without dead ends: 102 [2021-02-19 17:46:56,684 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:46:56,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-02-19 17:46:56,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 90. [2021-02-19 17:46:56,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.1797752808988764) internal successors, (194), 89 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) [2021-02-19 17:46:56,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 194 transitions. [2021-02-19 17:46:56,685 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 194 transitions. Word has length 17 [2021-02-19 17:46:56,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:56,685 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 194 transitions. [2021-02-19 17:46:56,685 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) [2021-02-19 17:46:56,685 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 194 transitions. [2021-02-19 17:46:56,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:56,685 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:56,685 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:56,886 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable655,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:56,886 INFO L428 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:56,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:56,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1234024409, now seen corresponding path program 125 times [2021-02-19 17:46:56,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:56,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889778822] [2021-02-19 17:46:56,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:56,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:56,940 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:56,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889778822] [2021-02-19 17:46:56,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525090756] [2021-02-19 17:46:56,940 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 [2021-02-19 17:46:56,962 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:46:56,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:56,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:46:56,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:57,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:57,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:57,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:46:57,049 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:57,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:57,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:46:57,052 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:57,065 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-02-19 17:46:57,065 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:46:57,066 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:46:57,066 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-02-19 17:46:57,071 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:57,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:57,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-02-19 17:46:57,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675928303] [2021-02-19 17:46:57,071 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:46:57,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:57,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:46:57,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:46:57,071 INFO L87 Difference]: Start difference. First operand 90 states and 194 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) [2021-02-19 17:46:57,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:57,199 INFO L93 Difference]: Finished difference Result 111 states and 235 transitions. [2021-02-19 17:46:57,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:46:57,199 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 [2021-02-19 17:46:57,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:57,199 INFO L225 Difference]: With dead ends: 111 [2021-02-19 17:46:57,199 INFO L226 Difference]: Without dead ends: 111 [2021-02-19 17:46:57,200 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:46:57,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-02-19 17:46:57,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 90. [2021-02-19 17:46:57,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.1797752808988764) internal successors, (194), 89 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) [2021-02-19 17:46:57,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 194 transitions. [2021-02-19 17:46:57,201 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 194 transitions. Word has length 17 [2021-02-19 17:46:57,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:57,201 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 194 transitions. [2021-02-19 17:46:57,201 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) [2021-02-19 17:46:57,201 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 194 transitions. [2021-02-19 17:46:57,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:57,201 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:57,201 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:57,416 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable665 [2021-02-19 17:46:57,416 INFO L428 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:57,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:57,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1000392778, now seen corresponding path program 126 times [2021-02-19 17:46:57,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:57,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421785866] [2021-02-19 17:46:57,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:57,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:57,486 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:57,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421785866] [2021-02-19 17:46:57,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171646196] [2021-02-19 17:46:57,486 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 [2021-02-19 17:46:57,502 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-02-19 17:46:57,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:57,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:46:57,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:57,590 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:57,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:57,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-02-19 17:46:57,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815670341] [2021-02-19 17:46:57,591 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:46:57,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:57,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:46:57,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:46:57,591 INFO L87 Difference]: Start difference. First operand 90 states and 194 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) [2021-02-19 17:46:57,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:57,792 INFO L93 Difference]: Finished difference Result 96 states and 201 transitions. [2021-02-19 17:46:57,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:46:57,792 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 [2021-02-19 17:46:57,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:57,793 INFO L225 Difference]: With dead ends: 96 [2021-02-19 17:46:57,793 INFO L226 Difference]: Without dead ends: 90 [2021-02-19 17:46:57,793 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:46:57,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-02-19 17:46:57,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2021-02-19 17:46:57,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.168539325842697) internal successors, (193), 89 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:57,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 193 transitions. [2021-02-19 17:46:57,794 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 193 transitions. Word has length 17 [2021-02-19 17:46:57,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:57,794 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 193 transitions. [2021-02-19 17:46:57,794 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) [2021-02-19 17:46:57,794 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 193 transitions. [2021-02-19 17:46:57,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:57,794 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:57,794 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:57,994 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable669,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:57,995 INFO L428 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:57,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:57,995 INFO L82 PathProgramCache]: Analyzing trace with hash 885039697, now seen corresponding path program 127 times [2021-02-19 17:46:57,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:57,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019611413] [2021-02-19 17:46:57,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:57,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:58,055 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:58,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019611413] [2021-02-19 17:46:58,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159108298] [2021-02-19 17:46:58,056 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 [2021-02-19 17:46:58,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:58,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:46:58,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:58,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:58,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:58,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:46:58,164 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:58,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:58,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:58,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:46:58,168 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:58,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:58,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:58,171 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 [2021-02-19 17:46:58,172 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:58,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:58,174 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 16 treesize of output 12 [2021-02-19 17:46:58,175 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:58,205 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-02-19 17:46:58,206 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:46:58,206 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:58,206 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-02-19 17:46:58,237 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:58,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:58,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-02-19 17:46:58,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343379755] [2021-02-19 17:46:58,238 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:46:58,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:58,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:46:58,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:46:58,238 INFO L87 Difference]: Start difference. First operand 90 states and 193 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) [2021-02-19 17:46:58,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:58,458 INFO L93 Difference]: Finished difference Result 124 states and 261 transitions. [2021-02-19 17:46:58,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:46:58,459 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 [2021-02-19 17:46:58,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:58,459 INFO L225 Difference]: With dead ends: 124 [2021-02-19 17:46:58,459 INFO L226 Difference]: Without dead ends: 124 [2021-02-19 17:46:58,459 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:46:58,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-02-19 17:46:58,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 89. [2021-02-19 17:46:58,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 2.159090909090909) internal successors, (190), 88 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) [2021-02-19 17:46:58,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 190 transitions. [2021-02-19 17:46:58,460 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 190 transitions. Word has length 17 [2021-02-19 17:46:58,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:58,460 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 190 transitions. [2021-02-19 17:46:58,460 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) [2021-02-19 17:46:58,460 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 190 transitions. [2021-02-19 17:46:58,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:58,461 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:58,461 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:58,661 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable673 [2021-02-19 17:46:58,661 INFO L428 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:58,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:58,661 INFO L82 PathProgramCache]: Analyzing trace with hash 251456884, now seen corresponding path program 128 times [2021-02-19 17:46:58,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:58,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056623864] [2021-02-19 17:46:58,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:58,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:58,724 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:58,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056623864] [2021-02-19 17:46:58,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808028511] [2021-02-19 17:46:58,724 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 [2021-02-19 17:46:58,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:46:58,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:58,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:46:58,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:58,851 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:58,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:58,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-02-19 17:46:58,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424201599] [2021-02-19 17:46:58,852 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:46:58,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:58,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:46:58,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:46:58,852 INFO L87 Difference]: Start difference. First operand 89 states and 190 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) [2021-02-19 17:46:59,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:59,077 INFO L93 Difference]: Finished difference Result 114 states and 231 transitions. [2021-02-19 17:46:59,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:46:59,077 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 [2021-02-19 17:46:59,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:59,078 INFO L225 Difference]: With dead ends: 114 [2021-02-19 17:46:59,078 INFO L226 Difference]: Without dead ends: 111 [2021-02-19 17:46:59,078 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:46:59,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-02-19 17:46:59,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 94. [2021-02-19 17:46:59,079 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) [2021-02-19 17:46:59,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 201 transitions. [2021-02-19 17:46:59,079 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 201 transitions. Word has length 17 [2021-02-19 17:46:59,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:59,079 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 201 transitions. [2021-02-19 17:46:59,079 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) [2021-02-19 17:46:59,079 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 201 transitions. [2021-02-19 17:46:59,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:59,079 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:59,079 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:59,279 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable683 [2021-02-19 17:46:59,280 INFO L428 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:59,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:59,280 INFO L82 PathProgramCache]: Analyzing trace with hash 642939658, now seen corresponding path program 129 times [2021-02-19 17:46:59,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:59,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189615918] [2021-02-19 17:46:59,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:59,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:59,349 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:59,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189615918] [2021-02-19 17:46:59,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505936246] [2021-02-19 17:46:59,349 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 [2021-02-19 17:46:59,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:46:59,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:59,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2021-02-19 17:46:59,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:59,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:59,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:59,441 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 18 treesize of output 14 [2021-02-19 17:46:59,442 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:59,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:59,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:59,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:46:59,445 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:59,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:59,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:59,448 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 17 treesize of output 13 [2021-02-19 17:46:59,449 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:59,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:59,452 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 17 treesize of output 13 [2021-02-19 17:46:59,453 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:59,495 INFO L628 ElimStorePlain]: treesize reduction 65, result has 38.1 percent of original size [2021-02-19 17:46:59,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:59,497 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 9 treesize of output 5 [2021-02-19 17:46:59,499 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:46:59,514 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:59,515 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:59,515 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:133, output treesize:22 [2021-02-19 17:46:59,553 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:59,554 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:59,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-02-19 17:46:59,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429177000] [2021-02-19 17:46:59,554 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:46:59,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:59,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:46:59,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:46:59,554 INFO L87 Difference]: Start difference. First operand 94 states and 201 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) [2021-02-19 17:46:59,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:59,714 INFO L93 Difference]: Finished difference Result 99 states and 210 transitions. [2021-02-19 17:46:59,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:46:59,714 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 [2021-02-19 17:46:59,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:59,714 INFO L225 Difference]: With dead ends: 99 [2021-02-19 17:46:59,714 INFO L226 Difference]: Without dead ends: 99 [2021-02-19 17:46:59,715 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:46:59,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-02-19 17:46:59,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 88. [2021-02-19 17:46:59,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 2.160919540229885) internal successors, (188), 87 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:59,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 188 transitions. [2021-02-19 17:46:59,716 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 188 transitions. Word has length 17 [2021-02-19 17:46:59,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:59,716 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 188 transitions. [2021-02-19 17:46:59,716 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) [2021-02-19 17:46:59,716 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 188 transitions. [2021-02-19 17:46:59,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:59,716 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:59,716 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:59,930 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable695 [2021-02-19 17:46:59,930 INFO L428 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:59,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:59,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1472785019, now seen corresponding path program 130 times [2021-02-19 17:46:59,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:59,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635617966] [2021-02-19 17:46:59,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:59,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:00,001 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:00,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635617966] [2021-02-19 17:47:00,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996574815] [2021-02-19 17:47:00,002 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 [2021-02-19 17:47:00,018 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:47:00,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:00,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:47:00,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:00,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:00,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:00,116 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 16 treesize of output 12 [2021-02-19 17:47:00,117 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:00,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:00,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:47:00,120 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:00,157 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-02-19 17:47:00,157 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:47:00,159 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 [2021-02-19 17:47:00,160 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:00,172 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:00,172 INFO L518 ElimStorePlain]: Eliminatee v_prenex_97 vanished before elimination [2021-02-19 17:47:00,173 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:47:00,173 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-02-19 17:47:00,197 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:00,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:00,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-02-19 17:47:00,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482146932] [2021-02-19 17:47:00,197 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:47:00,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:00,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:47:00,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:47:00,197 INFO L87 Difference]: Start difference. First operand 88 states and 188 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) [2021-02-19 17:47:00,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:00,355 INFO L93 Difference]: Finished difference Result 122 states and 250 transitions. [2021-02-19 17:47:00,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:47:00,356 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 [2021-02-19 17:47:00,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:00,356 INFO L225 Difference]: With dead ends: 122 [2021-02-19 17:47:00,356 INFO L226 Difference]: Without dead ends: 122 [2021-02-19 17:47:00,356 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:47:00,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-02-19 17:47:00,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 89. [2021-02-19 17:47:00,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 2.1704545454545454) internal successors, (191), 88 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:00,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 191 transitions. [2021-02-19 17:47:00,357 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 191 transitions. Word has length 17 [2021-02-19 17:47:00,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:00,357 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 191 transitions. [2021-02-19 17:47:00,357 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) [2021-02-19 17:47:00,357 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 191 transitions. [2021-02-19 17:47:00,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:47:00,358 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:00,358 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:00,558 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable699,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:00,558 INFO L428 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:00,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:00,558 INFO L82 PathProgramCache]: Analyzing trace with hash 839202206, now seen corresponding path program 131 times [2021-02-19 17:47:00,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:00,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412548658] [2021-02-19 17:47:00,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:00,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:00,618 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:00,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412548658] [2021-02-19 17:47:00,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751021755] [2021-02-19 17:47:00,618 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 [2021-02-19 17:47:00,634 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:47:00,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:00,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:47:00,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:00,763 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:00,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:00,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-02-19 17:47:00,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20355287] [2021-02-19 17:47:00,764 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:47:00,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:00,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:47:00,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:47:00,764 INFO L87 Difference]: Start difference. First operand 89 states and 191 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) [2021-02-19 17:47:00,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:00,880 INFO L93 Difference]: Finished difference Result 127 states and 256 transitions. [2021-02-19 17:47:00,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:47:00,881 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 [2021-02-19 17:47:00,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:00,881 INFO L225 Difference]: With dead ends: 127 [2021-02-19 17:47:00,881 INFO L226 Difference]: Without dead ends: 124 [2021-02-19 17:47:00,881 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:47:00,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-02-19 17:47:00,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 95. [2021-02-19 17:47:00,882 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) [2021-02-19 17:47:00,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 205 transitions. [2021-02-19 17:47:00,882 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 205 transitions. Word has length 17 [2021-02-19 17:47:00,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:00,882 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 205 transitions. [2021-02-19 17:47:00,882 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) [2021-02-19 17:47:00,882 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 205 transitions. [2021-02-19 17:47:00,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:47:00,883 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:00,883 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:01,083 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable706,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:01,083 INFO L428 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:01,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:01,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1230684980, now seen corresponding path program 132 times [2021-02-19 17:47:01,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:01,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327679417] [2021-02-19 17:47:01,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:01,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:01,153 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:01,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327679417] [2021-02-19 17:47:01,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408902930] [2021-02-19 17:47:01,154 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 [2021-02-19 17:47:01,170 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:47:01,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:01,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:47:01,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:01,336 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:01,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:01,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-02-19 17:47:01,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89378789] [2021-02-19 17:47:01,337 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:47:01,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:01,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:47:01,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:47:01,338 INFO L87 Difference]: Start difference. First operand 95 states and 205 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) [2021-02-19 17:47:01,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:01,557 INFO L93 Difference]: Finished difference Result 132 states and 268 transitions. [2021-02-19 17:47:01,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:47:01,558 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 [2021-02-19 17:47:01,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:01,558 INFO L225 Difference]: With dead ends: 132 [2021-02-19 17:47:01,558 INFO L226 Difference]: Without dead ends: 132 [2021-02-19 17:47:01,558 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:47:01,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-02-19 17:47:01,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 94. [2021-02-19 17:47:01,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.182795698924731) internal successors, (203), 93 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) [2021-02-19 17:47:01,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 203 transitions. [2021-02-19 17:47:01,560 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 203 transitions. Word has length 17 [2021-02-19 17:47:01,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:01,560 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 203 transitions. [2021-02-19 17:47:01,560 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) [2021-02-19 17:47:01,560 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 203 transitions. [2021-02-19 17:47:01,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:47:01,560 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:01,560 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:01,760 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable719 [2021-02-19 17:47:01,761 INFO L428 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:01,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:01,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1989543045, now seen corresponding path program 133 times [2021-02-19 17:47:01,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:01,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311585468] [2021-02-19 17:47:01,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:01,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:01,833 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:01,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311585468] [2021-02-19 17:47:01,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65574503] [2021-02-19 17:47:01,833 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 [2021-02-19 17:47:01,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:01,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:47:01,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:01,957 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:01,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:01,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-02-19 17:47:01,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932772045] [2021-02-19 17:47:01,958 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:47:01,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:01,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:47:01,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:47:01,958 INFO L87 Difference]: Start difference. First operand 94 states and 203 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) [2021-02-19 17:47:02,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:02,151 INFO L93 Difference]: Finished difference Result 98 states and 207 transitions. [2021-02-19 17:47:02,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:47:02,151 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 [2021-02-19 17:47:02,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:02,152 INFO L225 Difference]: With dead ends: 98 [2021-02-19 17:47:02,152 INFO L226 Difference]: Without dead ends: 94 [2021-02-19 17:47:02,152 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:47:02,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-02-19 17:47:02,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2021-02-19 17:47:02,153 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) [2021-02-19 17:47:02,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 202 transitions. [2021-02-19 17:47:02,153 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 202 transitions. Word has length 17 [2021-02-19 17:47:02,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:02,153 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 202 transitions. [2021-02-19 17:47:02,153 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) [2021-02-19 17:47:02,153 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 202 transitions. [2021-02-19 17:47:02,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:47:02,153 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:02,153 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:02,354 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable731 [2021-02-19 17:47:02,354 INFO L428 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:02,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:02,354 INFO L82 PathProgramCache]: Analyzing trace with hash 695455178, now seen corresponding path program 134 times [2021-02-19 17:47:02,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:02,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159490586] [2021-02-19 17:47:02,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:02,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:02,415 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:02,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159490586] [2021-02-19 17:47:02,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290192452] [2021-02-19 17:47:02,415 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 [2021-02-19 17:47:02,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:47:02,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:02,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:47:02,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:02,537 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:02,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:02,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-02-19 17:47:02,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677912242] [2021-02-19 17:47:02,537 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:47:02,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:02,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:47:02,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:47:02,538 INFO L87 Difference]: Start difference. First operand 94 states and 202 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) [2021-02-19 17:47:02,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:02,675 INFO L93 Difference]: Finished difference Result 107 states and 226 transitions. [2021-02-19 17:47:02,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:47:02,675 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 [2021-02-19 17:47:02,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:02,675 INFO L225 Difference]: With dead ends: 107 [2021-02-19 17:47:02,675 INFO L226 Difference]: Without dead ends: 107 [2021-02-19 17:47:02,675 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:47:02,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-02-19 17:47:02,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 86. [2021-02-19 17:47:02,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.164705882352941) internal successors, (184), 85 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) [2021-02-19 17:47:02,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 184 transitions. [2021-02-19 17:47:02,676 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 184 transitions. Word has length 17 [2021-02-19 17:47:02,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:02,677 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 184 transitions. [2021-02-19 17:47:02,677 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) [2021-02-19 17:47:02,677 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 184 transitions. [2021-02-19 17:47:02,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:47:02,677 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:02,677 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:02,877 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable736,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:02,877 INFO L428 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:02,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:02,877 INFO L82 PathProgramCache]: Analyzing trace with hash -878404221, now seen corresponding path program 135 times [2021-02-19 17:47:02,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:02,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28646604] [2021-02-19 17:47:02,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:02,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:02,940 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:02,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28646604] [2021-02-19 17:47:02,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954404343] [2021-02-19 17:47:02,940 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 [2021-02-19 17:47:02,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:47:02,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:02,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:47:02,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:03,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:03,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:03,045 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 15 treesize of output 11 [2021-02-19 17:47:03,046 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:03,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:03,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:47:03,049 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:03,062 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-02-19 17:47:03,063 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:47:03,063 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:47:03,063 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-02-19 17:47:03,077 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:03,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:03,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-02-19 17:47:03,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168911807] [2021-02-19 17:47:03,077 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:47:03,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:03,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:47:03,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:47:03,078 INFO L87 Difference]: Start difference. First operand 86 states and 184 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) [2021-02-19 17:47:03,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:03,235 INFO L93 Difference]: Finished difference Result 109 states and 230 transitions. [2021-02-19 17:47:03,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:47:03,235 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 [2021-02-19 17:47:03,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:03,235 INFO L225 Difference]: With dead ends: 109 [2021-02-19 17:47:03,235 INFO L226 Difference]: Without dead ends: 109 [2021-02-19 17:47:03,235 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:47:03,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-02-19 17:47:03,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 87. [2021-02-19 17:47:03,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.1744186046511627) internal successors, (187), 86 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) [2021-02-19 17:47:03,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 187 transitions. [2021-02-19 17:47:03,236 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 187 transitions. Word has length 17 [2021-02-19 17:47:03,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:03,237 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 187 transitions. [2021-02-19 17:47:03,237 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) [2021-02-19 17:47:03,237 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 187 transitions. [2021-02-19 17:47:03,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:47:03,237 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:03,237 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:03,445 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable740 [2021-02-19 17:47:03,446 INFO L428 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:03,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:03,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1112035852, now seen corresponding path program 136 times [2021-02-19 17:47:03,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:03,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856684733] [2021-02-19 17:47:03,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:03,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:03,516 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:03,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856684733] [2021-02-19 17:47:03,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998970272] [2021-02-19 17:47:03,516 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 [2021-02-19 17:47:03,532 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:47:03,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:03,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:47:03,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:03,619 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:03,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:03,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-02-19 17:47:03,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026727021] [2021-02-19 17:47:03,620 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:47:03,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:03,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:47:03,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:47:03,620 INFO L87 Difference]: Start difference. First operand 87 states and 187 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) [2021-02-19 17:47:03,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:03,812 INFO L93 Difference]: Finished difference Result 94 states and 196 transitions. [2021-02-19 17:47:03,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:47:03,813 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 [2021-02-19 17:47:03,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:03,813 INFO L225 Difference]: With dead ends: 94 [2021-02-19 17:47:03,813 INFO L226 Difference]: Without dead ends: 88 [2021-02-19 17:47:03,813 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:47:03,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-02-19 17:47:03,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2021-02-19 17:47:03,814 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) [2021-02-19 17:47:03,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 186 transitions. [2021-02-19 17:47:03,814 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 186 transitions. Word has length 17 [2021-02-19 17:47:03,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:03,815 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 186 transitions. [2021-02-19 17:47:03,815 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) [2021-02-19 17:47:03,815 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 186 transitions. [2021-02-19 17:47:03,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:47:03,815 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:03,815 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:04,029 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable744,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:04,030 INFO L428 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:04,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:04,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1022151249, now seen corresponding path program 137 times [2021-02-19 17:47:04,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:04,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131683325] [2021-02-19 17:47:04,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:04,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:04,098 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:04,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131683325] [2021-02-19 17:47:04,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125688705] [2021-02-19 17:47:04,098 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 [2021-02-19 17:47:04,115 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 17:47:04,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:04,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:47:04,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:04,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:04,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:04,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:47:04,215 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:04,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:04,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:04,219 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 17 treesize of output 13 [2021-02-19 17:47:04,220 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:04,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:04,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:04,223 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 15 treesize of output 11 [2021-02-19 17:47:04,223 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:04,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:04,226 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 16 treesize of output 12 [2021-02-19 17:47:04,227 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:04,258 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-02-19 17:47:04,258 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:47:04,259 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:47:04,259 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-02-19 17:47:04,292 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:04,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:04,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-02-19 17:47:04,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489018122] [2021-02-19 17:47:04,293 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:47:04,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:04,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:47:04,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:47:04,293 INFO L87 Difference]: Start difference. First operand 87 states and 186 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) [2021-02-19 17:47:04,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:04,559 INFO L93 Difference]: Finished difference Result 137 states and 279 transitions. [2021-02-19 17:47:04,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:47:04,559 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 [2021-02-19 17:47:04,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:04,560 INFO L225 Difference]: With dead ends: 137 [2021-02-19 17:47:04,560 INFO L226 Difference]: Without dead ends: 137 [2021-02-19 17:47:04,560 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:47:04,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-02-19 17:47:04,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 88. [2021-02-19 17:47:04,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 2.1839080459770117) internal successors, (190), 87 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) [2021-02-19 17:47:04,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 190 transitions. [2021-02-19 17:47:04,561 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 190 transitions. Word has length 17 [2021-02-19 17:47:04,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:04,561 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 190 transitions. [2021-02-19 17:47:04,561 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) [2021-02-19 17:47:04,561 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 190 transitions. [2021-02-19 17:47:04,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:47:04,561 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:04,561 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:04,761 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable748 [2021-02-19 17:47:04,762 INFO L428 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:04,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:04,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1860971746, now seen corresponding path program 138 times [2021-02-19 17:47:04,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:04,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722962049] [2021-02-19 17:47:04,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:04,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:04,829 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:04,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722962049] [2021-02-19 17:47:04,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647701871] [2021-02-19 17:47:04,829 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 [2021-02-19 17:47:04,845 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:47:04,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:04,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:47:04,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:04,947 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:04,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:04,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-02-19 17:47:04,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147014393] [2021-02-19 17:47:04,947 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:47:04,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:04,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:47:04,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:47:04,948 INFO L87 Difference]: Start difference. First operand 88 states and 190 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) [2021-02-19 17:47:05,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:05,192 INFO L93 Difference]: Finished difference Result 114 states and 231 transitions. [2021-02-19 17:47:05,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:47:05,192 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 [2021-02-19 17:47:05,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:05,193 INFO L225 Difference]: With dead ends: 114 [2021-02-19 17:47:05,193 INFO L226 Difference]: Without dead ends: 111 [2021-02-19 17:47:05,193 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:47:05,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-02-19 17:47:05,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 92. [2021-02-19 17:47:05,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.1758241758241756) internal successors, (198), 91 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) [2021-02-19 17:47:05,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 198 transitions. [2021-02-19 17:47:05,194 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 198 transitions. Word has length 17 [2021-02-19 17:47:05,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:05,194 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 198 transitions. [2021-02-19 17:47:05,194 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) [2021-02-19 17:47:05,194 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 198 transitions. [2021-02-19 17:47:05,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:47:05,194 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:05,194 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:05,402 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable760 [2021-02-19 17:47:05,403 INFO L428 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:05,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:05,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1751421059, now seen corresponding path program 139 times [2021-02-19 17:47:05,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:05,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873012254] [2021-02-19 17:47:05,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:05,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:05,472 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:05,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873012254] [2021-02-19 17:47:05,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526695682] [2021-02-19 17:47:05,472 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 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 [2021-02-19 17:47:05,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:05,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:47:05,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:05,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:05,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:05,587 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 17 treesize of output 13 [2021-02-19 17:47:05,589 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:05,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:05,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:05,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:47:05,593 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:05,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:05,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:05,597 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 [2021-02-19 17:47:05,598 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:05,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:05,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:47:05,601 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:05,639 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-02-19 17:47:05,640 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:47:05,641 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:47:05,641 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-02-19 17:47:05,669 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:05,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:05,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-02-19 17:47:05,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187175501] [2021-02-19 17:47:05,670 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:47:05,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:05,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:47:05,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:47:05,670 INFO L87 Difference]: Start difference. First operand 92 states and 198 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) [2021-02-19 17:47:05,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:05,846 INFO L93 Difference]: Finished difference Result 114 states and 239 transitions. [2021-02-19 17:47:05,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:47:05,846 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 [2021-02-19 17:47:05,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:05,846 INFO L225 Difference]: With dead ends: 114 [2021-02-19 17:47:05,846 INFO L226 Difference]: Without dead ends: 112 [2021-02-19 17:47:05,847 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:47:05,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-02-19 17:47:05,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 92. [2021-02-19 17:47:05,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.1648351648351647) internal successors, (197), 91 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) [2021-02-19 17:47:05,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 197 transitions. [2021-02-19 17:47:05,848 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 197 transitions. Word has length 17 [2021-02-19 17:47:05,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:05,848 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 197 transitions. [2021-02-19 17:47:05,848 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) [2021-02-19 17:47:05,848 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 197 transitions. [2021-02-19 17:47:05,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:47:05,848 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:05,848 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:06,048 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable772 [2021-02-19 17:47:06,048 INFO L428 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:06,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:06,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1469488972, now seen corresponding path program 140 times [2021-02-19 17:47:06,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:06,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490074533] [2021-02-19 17:47:06,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:06,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:06,127 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:06,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490074533] [2021-02-19 17:47:06,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465385783] [2021-02-19 17:47:06,127 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 [2021-02-19 17:47:06,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:47:06,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:06,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:47:06,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:06,256 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:06,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:06,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-02-19 17:47:06,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838802926] [2021-02-19 17:47:06,257 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:47:06,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:06,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:47:06,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:47:06,257 INFO L87 Difference]: Start difference. First operand 92 states and 197 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) [2021-02-19 17:47:06,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:06,483 INFO L93 Difference]: Finished difference Result 97 states and 206 transitions. [2021-02-19 17:47:06,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:47:06,484 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 [2021-02-19 17:47:06,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:06,484 INFO L225 Difference]: With dead ends: 97 [2021-02-19 17:47:06,484 INFO L226 Difference]: Without dead ends: 97 [2021-02-19 17:47:06,484 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:47:06,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-02-19 17:47:06,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 86. [2021-02-19 17:47:06,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.164705882352941) internal successors, (184), 85 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) [2021-02-19 17:47:06,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 184 transitions. [2021-02-19 17:47:06,485 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 184 transitions. Word has length 17 [2021-02-19 17:47:06,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:06,485 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 184 transitions. [2021-02-19 17:47:06,485 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) [2021-02-19 17:47:06,485 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 184 transitions. [2021-02-19 17:47:06,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:47:06,486 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:06,486 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:06,686 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable783,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:06,686 INFO L428 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:06,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:06,686 INFO L82 PathProgramCache]: Analyzing trace with hash -639643611, now seen corresponding path program 141 times [2021-02-19 17:47:06,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:06,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539471929] [2021-02-19 17:47:06,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:06,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:06,753 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:06,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539471929] [2021-02-19 17:47:06,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421007550] [2021-02-19 17:47:06,754 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 [2021-02-19 17:47:06,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:47:06,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:06,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2021-02-19 17:47:06,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:06,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:06,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:06,854 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 18 treesize of output 14 [2021-02-19 17:47:06,854 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:06,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:06,857 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 17 treesize of output 13 [2021-02-19 17:47:06,858 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:06,906 INFO L628 ElimStorePlain]: treesize reduction 74, result has 42.6 percent of original size [2021-02-19 17:47:06,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:06,909 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 12 treesize of output 8 [2021-02-19 17:47:06,910 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:47:06,927 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:06,930 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 [2021-02-19 17:47:06,931 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:06,946 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:06,946 INFO L518 ElimStorePlain]: Eliminatee v_prenex_101 vanished before elimination [2021-02-19 17:47:06,948 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:47:06,948 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:141, output treesize:22 [2021-02-19 17:47:06,987 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:06,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:06,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-02-19 17:47:06,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114547891] [2021-02-19 17:47:06,988 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:47:06,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:06,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:47:06,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:47:06,988 INFO L87 Difference]: Start difference. First operand 86 states and 184 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) [2021-02-19 17:47:07,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:07,150 INFO L93 Difference]: Finished difference Result 118 states and 239 transitions. [2021-02-19 17:47:07,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:47:07,151 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 [2021-02-19 17:47:07,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:07,151 INFO L225 Difference]: With dead ends: 118 [2021-02-19 17:47:07,151 INFO L226 Difference]: Without dead ends: 118 [2021-02-19 17:47:07,151 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:47:07,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-02-19 17:47:07,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 85. [2021-02-19 17:47:07,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.1547619047619047) internal successors, (181), 84 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) [2021-02-19 17:47:07,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 181 transitions. [2021-02-19 17:47:07,152 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 181 transitions. Word has length 17 [2021-02-19 17:47:07,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:07,152 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 181 transitions. [2021-02-19 17:47:07,152 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) [2021-02-19 17:47:07,152 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 181 transitions. [2021-02-19 17:47:07,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:47:07,153 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:07,153 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:07,368 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable793 [2021-02-19 17:47:07,368 INFO L428 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:07,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:07,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1273226424, now seen corresponding path program 142 times [2021-02-19 17:47:07,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:07,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388873073] [2021-02-19 17:47:07,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:07,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:07,432 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:07,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388873073] [2021-02-19 17:47:07,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920585633] [2021-02-19 17:47:07,432 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 [2021-02-19 17:47:07,448 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:47:07,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:07,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:47:07,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:07,571 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:07,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:07,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-02-19 17:47:07,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728633122] [2021-02-19 17:47:07,572 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:47:07,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:07,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:47:07,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:47:07,572 INFO L87 Difference]: Start difference. First operand 85 states and 181 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) [2021-02-19 17:47:07,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:07,785 INFO L93 Difference]: Finished difference Result 123 states and 246 transitions. [2021-02-19 17:47:07,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:47:07,786 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 [2021-02-19 17:47:07,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:07,786 INFO L225 Difference]: With dead ends: 123 [2021-02-19 17:47:07,786 INFO L226 Difference]: Without dead ends: 120 [2021-02-19 17:47:07,786 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:47:07,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-02-19 17:47:07,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 91. [2021-02-19 17:47:07,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 2.1666666666666665) internal successors, (195), 90 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:07,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 195 transitions. [2021-02-19 17:47:07,787 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 195 transitions. Word has length 17 [2021-02-19 17:47:07,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:07,787 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 195 transitions. [2021-02-19 17:47:07,787 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) [2021-02-19 17:47:07,787 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 195 transitions. [2021-02-19 17:47:07,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:47:07,788 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:07,788 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:07,988 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable797 [2021-02-19 17:47:07,988 INFO L428 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:07,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:07,988 INFO L82 PathProgramCache]: Analyzing trace with hash -881743650, now seen corresponding path program 143 times [2021-02-19 17:47:07,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:07,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890021653] [2021-02-19 17:47:07,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:07,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:08,052 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:08,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890021653] [2021-02-19 17:47:08,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575457179] [2021-02-19 17:47:08,052 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 [2021-02-19 17:47:08,068 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 17:47:08,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:08,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:47:08,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:08,194 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:08,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:08,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-02-19 17:47:08,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791525087] [2021-02-19 17:47:08,194 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:47:08,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:08,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:47:08,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:47:08,194 INFO L87 Difference]: Start difference. First operand 91 states and 195 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) [2021-02-19 17:47:08,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:08,394 INFO L93 Difference]: Finished difference Result 126 states and 255 transitions. [2021-02-19 17:47:08,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:47:08,395 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 [2021-02-19 17:47:08,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:08,395 INFO L225 Difference]: With dead ends: 126 [2021-02-19 17:47:08,395 INFO L226 Difference]: Without dead ends: 126 [2021-02-19 17:47:08,395 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:47:08,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-02-19 17:47:08,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 90. [2021-02-19 17:47:08,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.168539325842697) internal successors, (193), 89 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:08,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 193 transitions. [2021-02-19 17:47:08,396 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 193 transitions. Word has length 17 [2021-02-19 17:47:08,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:08,397 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 193 transitions. [2021-02-19 17:47:08,397 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) [2021-02-19 17:47:08,397 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 193 transitions. [2021-02-19 17:47:08,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:47:08,397 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:08,397 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:08,602 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable808,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:08,602 INFO L428 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:08,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:08,602 INFO L82 PathProgramCache]: Analyzing trace with hash 192995621, now seen corresponding path program 144 times [2021-02-19 17:47:08,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:08,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617761046] [2021-02-19 17:47:08,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:08,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:08,679 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:08,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617761046] [2021-02-19 17:47:08,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357972564] [2021-02-19 17:47:08,679 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 [2021-02-19 17:47:08,699 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-02-19 17:47:08,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:08,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:47:08,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:08,809 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:08,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:08,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-02-19 17:47:08,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53175878] [2021-02-19 17:47:08,810 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:47:08,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:08,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:47:08,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:47:08,810 INFO L87 Difference]: Start difference. First operand 90 states and 193 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) [2021-02-19 17:47:09,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:09,032 INFO L93 Difference]: Finished difference Result 94 states and 197 transitions. [2021-02-19 17:47:09,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:47:09,033 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 [2021-02-19 17:47:09,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:09,033 INFO L225 Difference]: With dead ends: 94 [2021-02-19 17:47:09,033 INFO L226 Difference]: Without dead ends: 90 [2021-02-19 17:47:09,033 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:47:09,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-02-19 17:47:09,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2021-02-19 17:47:09,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.157303370786517) internal successors, (192), 89 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) [2021-02-19 17:47:09,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 192 transitions. [2021-02-19 17:47:09,034 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 192 transitions. Word has length 17 [2021-02-19 17:47:09,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:09,034 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 192 transitions. [2021-02-19 17:47:09,034 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) [2021-02-19 17:47:09,034 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 192 transitions. [2021-02-19 17:47:09,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:47:09,034 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:09,034 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:09,249 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable820 [2021-02-19 17:47:09,249 INFO L428 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:09,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:09,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1416973452, now seen corresponding path program 145 times [2021-02-19 17:47:09,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:09,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584414675] [2021-02-19 17:47:09,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:09,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:09,312 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:09,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584414675] [2021-02-19 17:47:09,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067416337] [2021-02-19 17:47:09,313 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 [2021-02-19 17:47:09,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:09,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:47:09,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:09,429 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:09,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:09,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-02-19 17:47:09,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325885220] [2021-02-19 17:47:09,429 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:47:09,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:09,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:47:09,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:47:09,430 INFO L87 Difference]: Start difference. First operand 90 states and 192 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) [2021-02-19 17:47:09,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:09,550 INFO L93 Difference]: Finished difference Result 103 states and 216 transitions. [2021-02-19 17:47:09,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:47:09,551 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 [2021-02-19 17:47:09,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:09,551 INFO L225 Difference]: With dead ends: 103 [2021-02-19 17:47:09,551 INFO L226 Difference]: Without dead ends: 103 [2021-02-19 17:47:09,551 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:47:09,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-02-19 17:47:09,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 83. [2021-02-19 17:47:09,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.1463414634146343) internal successors, (176), 82 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) [2021-02-19 17:47:09,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 176 transitions. [2021-02-19 17:47:09,552 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 176 transitions. Word has length 17 [2021-02-19 17:47:09,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:09,552 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 176 transitions. [2021-02-19 17:47:09,552 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) [2021-02-19 17:47:09,552 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 176 transitions. [2021-02-19 17:47:09,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:47:09,553 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:09,553 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:09,753 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable826,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:09,753 INFO L428 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:09,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:09,753 INFO L82 PathProgramCache]: Analyzing trace with hash 605829871, now seen corresponding path program 146 times [2021-02-19 17:47:09,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:09,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870360490] [2021-02-19 17:47:09,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:09,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:09,825 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:09,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870360490] [2021-02-19 17:47:09,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071572485] [2021-02-19 17:47:09,825 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 [2021-02-19 17:47:09,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:47:09,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:09,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:47:09,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:09,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:09,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:09,963 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 16 treesize of output 12 [2021-02-19 17:47:09,964 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:09,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:09,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:47:09,967 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:10,008 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-02-19 17:47:10,008 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:47:10,010 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 [2021-02-19 17:47:10,011 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:10,024 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:10,024 INFO L518 ElimStorePlain]: Eliminatee v_prenex_105 vanished before elimination [2021-02-19 17:47:10,028 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:47:10,029 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-02-19 17:47:10,069 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:10,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:10,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-02-19 17:47:10,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724665479] [2021-02-19 17:47:10,070 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:47:10,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:10,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:47:10,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:47:10,070 INFO L87 Difference]: Start difference. First operand 83 states and 176 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) [2021-02-19 17:47:10,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:10,431 INFO L93 Difference]: Finished difference Result 116 states and 235 transitions. [2021-02-19 17:47:10,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:47:10,431 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 [2021-02-19 17:47:10,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:10,432 INFO L225 Difference]: With dead ends: 116 [2021-02-19 17:47:10,432 INFO L226 Difference]: Without dead ends: 116 [2021-02-19 17:47:10,432 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:47:10,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-02-19 17:47:10,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 86. [2021-02-19 17:47:10,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.1882352941176473) internal successors, (186), 85 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) [2021-02-19 17:47:10,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 186 transitions. [2021-02-19 17:47:10,433 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 186 transitions. Word has length 17 [2021-02-19 17:47:10,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:10,433 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 186 transitions. [2021-02-19 17:47:10,433 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) [2021-02-19 17:47:10,433 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 186 transitions. [2021-02-19 17:47:10,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:47:10,433 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:10,433 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:10,634 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable830 [2021-02-19 17:47:10,634 INFO L428 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:10,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:10,634 INFO L82 PathProgramCache]: Analyzing trace with hash -232990626, now seen corresponding path program 147 times [2021-02-19 17:47:10,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:10,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935554851] [2021-02-19 17:47:10,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:10,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:10,698 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:10,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935554851] [2021-02-19 17:47:10,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286822907] [2021-02-19 17:47:10,698 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 [2021-02-19 17:47:10,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:47:10,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:10,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:47:10,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:10,860 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:10,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:10,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-02-19 17:47:10,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539743246] [2021-02-19 17:47:10,860 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:47:10,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:10,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:47:10,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:47:10,861 INFO L87 Difference]: Start difference. First operand 86 states and 186 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) [2021-02-19 17:47:11,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:11,147 INFO L93 Difference]: Finished difference Result 121 states and 243 transitions. [2021-02-19 17:47:11,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:47:11,148 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 [2021-02-19 17:47:11,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:11,148 INFO L225 Difference]: With dead ends: 121 [2021-02-19 17:47:11,148 INFO L226 Difference]: Without dead ends: 118 [2021-02-19 17:47:11,148 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:47:11,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-02-19 17:47:11,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 92. [2021-02-19 17:47:11,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.197802197802198) internal successors, (200), 91 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) [2021-02-19 17:47:11,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 200 transitions. [2021-02-19 17:47:11,149 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 200 transitions. Word has length 17 [2021-02-19 17:47:11,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:11,149 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 200 transitions. [2021-02-19 17:47:11,149 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) [2021-02-19 17:47:11,149 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 200 transitions. [2021-02-19 17:47:11,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:47:11,150 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:11,150 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:11,350 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable837,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:11,350 INFO L428 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:11,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:11,350 INFO L82 PathProgramCache]: Analyzing trace with hash -915565117, now seen corresponding path program 148 times [2021-02-19 17:47:11,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:11,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95273184] [2021-02-19 17:47:11,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:11,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:11,419 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:11,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95273184] [2021-02-19 17:47:11,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439581810] [2021-02-19 17:47:11,419 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 [2021-02-19 17:47:11,435 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:47:11,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:11,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:47:11,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:11,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:11,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:11,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:47:11,557 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:11,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:11,560 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 [2021-02-19 17:47:11,560 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:11,601 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-02-19 17:47:11,603 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 [2021-02-19 17:47:11,604 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:11,616 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:11,616 INFO L518 ElimStorePlain]: Eliminatee v_prenex_109 vanished before elimination [2021-02-19 17:47:11,616 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:47:11,617 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:47:11,617 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-02-19 17:47:11,646 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:11,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:11,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-02-19 17:47:11,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221609936] [2021-02-19 17:47:11,646 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:47:11,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:11,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:47:11,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:47:11,647 INFO L87 Difference]: Start difference. First operand 92 states and 200 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) [2021-02-19 17:47:12,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:12,053 INFO L93 Difference]: Finished difference Result 121 states and 245 transitions. [2021-02-19 17:47:12,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:47:12,054 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 [2021-02-19 17:47:12,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:12,054 INFO L225 Difference]: With dead ends: 121 [2021-02-19 17:47:12,054 INFO L226 Difference]: Without dead ends: 119 [2021-02-19 17:47:12,054 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:47:12,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-02-19 17:47:12,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 92. [2021-02-19 17:47:12,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.1868131868131866) internal successors, (199), 91 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) [2021-02-19 17:47:12,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 199 transitions. [2021-02-19 17:47:12,056 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 199 transitions. Word has length 17 [2021-02-19 17:47:12,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:12,056 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 199 transitions. [2021-02-19 17:47:12,056 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) [2021-02-19 17:47:12,056 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 199 transitions. [2021-02-19 17:47:12,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:47:12,056 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:12,056 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:12,270 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable848,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:12,270 INFO L428 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:12,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:12,270 INFO L82 PathProgramCache]: Analyzing trace with hash 158492148, now seen corresponding path program 149 times [2021-02-19 17:47:12,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:12,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222517579] [2021-02-19 17:47:12,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:12,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:12,335 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:12,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222517579] [2021-02-19 17:47:12,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067663457] [2021-02-19 17:47:12,335 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 [2021-02-19 17:47:12,354 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 17:47:12,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:12,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:47:12,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:12,530 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:12,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:12,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-02-19 17:47:12,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348533114] [2021-02-19 17:47:12,531 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:47:12,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:12,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:47:12,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:47:12,531 INFO L87 Difference]: Start difference. First operand 92 states and 199 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) [2021-02-19 17:47:12,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:12,968 INFO L93 Difference]: Finished difference Result 124 states and 251 transitions. [2021-02-19 17:47:12,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:47:12,968 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 [2021-02-19 17:47:12,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:12,969 INFO L225 Difference]: With dead ends: 124 [2021-02-19 17:47:12,969 INFO L226 Difference]: Without dead ends: 124 [2021-02-19 17:47:12,969 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:47:12,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-02-19 17:47:12,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 91. [2021-02-19 17:47:12,970 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) [2021-02-19 17:47:12,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 197 transitions. [2021-02-19 17:47:12,970 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 197 transitions. Word has length 17 [2021-02-19 17:47:12,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:12,970 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 197 transitions. [2021-02-19 17:47:12,970 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) [2021-02-19 17:47:12,970 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 197 transitions. [2021-02-19 17:47:12,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:47:12,970 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:12,970 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:13,178 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable856 [2021-02-19 17:47:13,178 INFO L428 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:13,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:13,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1233231419, now seen corresponding path program 150 times [2021-02-19 17:47:13,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:13,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843673885] [2021-02-19 17:47:13,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:13,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:13,245 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:13,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843673885] [2021-02-19 17:47:13,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966895903] [2021-02-19 17:47:13,245 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 [2021-02-19 17:47:13,261 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-02-19 17:47:13,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:13,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:47:13,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:13,394 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:13,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:13,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-02-19 17:47:13,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132229732] [2021-02-19 17:47:13,395 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:47:13,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:13,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:47:13,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:47:13,395 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) [2021-02-19 17:47:13,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:13,713 INFO L93 Difference]: Finished difference Result 99 states and 207 transitions. [2021-02-19 17:47:13,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:47:13,713 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 [2021-02-19 17:47:13,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:13,714 INFO L225 Difference]: With dead ends: 99 [2021-02-19 17:47:13,714 INFO L226 Difference]: Without dead ends: 95 [2021-02-19 17:47:13,714 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:47:13,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-02-19 17:47:13,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 91. [2021-02-19 17:47:13,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 2.1777777777777776) internal successors, (196), 90 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) [2021-02-19 17:47:13,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 196 transitions. [2021-02-19 17:47:13,715 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 196 transitions. Word has length 17 [2021-02-19 17:47:13,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:13,715 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 196 transitions. [2021-02-19 17:47:13,715 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) [2021-02-19 17:47:13,715 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 196 transitions. [2021-02-19 17:47:13,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:47:13,715 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:13,715 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:13,930 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable868,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:13,931 INFO L428 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:13,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:13,931 INFO L82 PathProgramCache]: Analyzing trace with hash -376737654, now seen corresponding path program 151 times [2021-02-19 17:47:13,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:13,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391695209] [2021-02-19 17:47:13,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:13,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:13,989 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:13,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391695209] [2021-02-19 17:47:13,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871898838] [2021-02-19 17:47:13,989 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 [2021-02-19 17:47:14,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:14,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:47:14,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:14,125 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:14,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:14,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-02-19 17:47:14,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735396546] [2021-02-19 17:47:14,125 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:47:14,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:14,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:47:14,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:47:14,126 INFO L87 Difference]: Start difference. First operand 91 states and 196 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) [2021-02-19 17:47:14,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:14,381 INFO L93 Difference]: Finished difference Result 111 states and 232 transitions. [2021-02-19 17:47:14,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:47:14,382 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 [2021-02-19 17:47:14,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:14,382 INFO L225 Difference]: With dead ends: 111 [2021-02-19 17:47:14,382 INFO L226 Difference]: Without dead ends: 111 [2021-02-19 17:47:14,382 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:47:14,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-02-19 17:47:14,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 90. [2021-02-19 17:47:14,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.1797752808988764) internal successors, (194), 89 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) [2021-02-19 17:47:14,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 194 transitions. [2021-02-19 17:47:14,383 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 194 transitions. Word has length 17 [2021-02-19 17:47:14,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:14,384 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 194 transitions. [2021-02-19 17:47:14,384 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) [2021-02-19 17:47:14,384 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 194 transitions. [2021-02-19 17:47:14,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:47:14,384 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:14,384 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:14,584 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable873 [2021-02-19 17:47:14,584 INFO L428 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:14,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:14,585 INFO L82 PathProgramCache]: Analyzing trace with hash -873552701, now seen corresponding path program 152 times [2021-02-19 17:47:14,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:14,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258046722] [2021-02-19 17:47:14,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:14,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:14,655 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:14,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258046722] [2021-02-19 17:47:14,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904992452] [2021-02-19 17:47:14,656 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 [2021-02-19 17:47:14,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:47:14,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:14,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:47:14,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:14,792 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:14,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:14,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-02-19 17:47:14,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998100979] [2021-02-19 17:47:14,793 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:47:14,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:14,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:47:14,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:47:14,793 INFO L87 Difference]: Start difference. First operand 90 states and 194 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) [2021-02-19 17:47:15,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:15,036 INFO L93 Difference]: Finished difference Result 96 states and 201 transitions. [2021-02-19 17:47:15,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:47:15,037 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 [2021-02-19 17:47:15,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:15,037 INFO L225 Difference]: With dead ends: 96 [2021-02-19 17:47:15,037 INFO L226 Difference]: Without dead ends: 90 [2021-02-19 17:47:15,037 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:47:15,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-02-19 17:47:15,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2021-02-19 17:47:15,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.168539325842697) internal successors, (193), 89 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:15,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 193 transitions. [2021-02-19 17:47:15,038 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 193 transitions. Word has length 17 [2021-02-19 17:47:15,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:15,038 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 193 transitions. [2021-02-19 17:47:15,038 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) [2021-02-19 17:47:15,038 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 193 transitions. [2021-02-19 17:47:15,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:47:15,039 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:15,039 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:15,239 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable877 [2021-02-19 17:47:15,239 INFO L428 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:15,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:15,239 INFO L82 PathProgramCache]: Analyzing trace with hash 211007668, now seen corresponding path program 153 times [2021-02-19 17:47:15,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:15,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929775699] [2021-02-19 17:47:15,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:15,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:15,297 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:15,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929775699] [2021-02-19 17:47:15,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303921765] [2021-02-19 17:47:15,297 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 [2021-02-19 17:47:15,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:47:15,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:15,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2021-02-19 17:47:15,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:15,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:15,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:15,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:47:15,417 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:15,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:15,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:47:15,420 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:15,440 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-02-19 17:47:15,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:15,442 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 9 treesize of output 5 [2021-02-19 17:47:15,443 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:47:15,448 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:15,450 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:47:15,450 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-02-19 17:47:15,468 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:15,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:15,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-02-19 17:47:15,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894017762] [2021-02-19 17:47:15,469 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:47:15,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:15,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:47:15,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:47:15,469 INFO L87 Difference]: Start difference. First operand 90 states and 193 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) [2021-02-19 17:47:15,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:15,571 INFO L93 Difference]: Finished difference Result 99 states and 208 transitions. [2021-02-19 17:47:15,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:47:15,571 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 [2021-02-19 17:47:15,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:15,572 INFO L225 Difference]: With dead ends: 99 [2021-02-19 17:47:15,572 INFO L226 Difference]: Without dead ends: 99 [2021-02-19 17:47:15,572 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:47:15,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-02-19 17:47:15,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 81. [2021-02-19 17:47:15,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.15) internal successors, (172), 80 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) [2021-02-19 17:47:15,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 172 transitions. [2021-02-19 17:47:15,573 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 172 transitions. Word has length 17 [2021-02-19 17:47:15,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:15,573 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 172 transitions. [2021-02-19 17:47:15,573 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) [2021-02-19 17:47:15,573 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 172 transitions. [2021-02-19 17:47:15,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:47:15,573 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:15,573 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:15,773 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable882,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:15,774 INFO L428 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:15,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:15,774 INFO L82 PathProgramCache]: Analyzing trace with hash 2143629367, now seen corresponding path program 154 times [2021-02-19 17:47:15,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:15,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721634563] [2021-02-19 17:47:15,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:15,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:15,843 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:15,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721634563] [2021-02-19 17:47:15,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959174058] [2021-02-19 17:47:15,843 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 [2021-02-19 17:47:15,859 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:47:15,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:15,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:47:15,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:15,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:15,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:15,949 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 16 treesize of output 12 [2021-02-19 17:47:15,950 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:15,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:15,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:47:15,953 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:15,968 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-02-19 17:47:15,968 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:47:15,968 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:47:15,968 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-02-19 17:47:15,982 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:15,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:15,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-02-19 17:47:15,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478509793] [2021-02-19 17:47:15,983 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:47:15,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:15,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:47:15,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:47:15,983 INFO L87 Difference]: Start difference. First operand 81 states and 172 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) [2021-02-19 17:47:16,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:16,151 INFO L93 Difference]: Finished difference Result 115 states and 239 transitions. [2021-02-19 17:47:16,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:47:16,152 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 [2021-02-19 17:47:16,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:16,152 INFO L225 Difference]: With dead ends: 115 [2021-02-19 17:47:16,152 INFO L226 Difference]: Without dead ends: 115 [2021-02-19 17:47:16,152 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:47:16,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-02-19 17:47:16,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 81. [2021-02-19 17:47:16,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.15) internal successors, (172), 80 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) [2021-02-19 17:47:16,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 172 transitions. [2021-02-19 17:47:16,153 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 172 transitions. Word has length 17 [2021-02-19 17:47:16,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:16,153 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 172 transitions. [2021-02-19 17:47:16,153 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) [2021-02-19 17:47:16,153 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 172 transitions. [2021-02-19 17:47:16,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:47:16,153 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:16,153 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:16,354 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable884 [2021-02-19 17:47:16,354 INFO L428 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:16,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:16,354 INFO L82 PathProgramCache]: Analyzing trace with hash 1909997736, now seen corresponding path program 155 times [2021-02-19 17:47:16,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:16,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524064224] [2021-02-19 17:47:16,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:16,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:16,464 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:16,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524064224] [2021-02-19 17:47:16,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081409939] [2021-02-19 17:47:16,464 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 [2021-02-19 17:47:16,492 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:47:16,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:16,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:47:16,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:16,579 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:16,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:16,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-02-19 17:47:16,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366725294] [2021-02-19 17:47:16,579 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:47:16,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:16,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:47:16,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:47:16,580 INFO L87 Difference]: Start difference. First operand 81 states and 172 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) [2021-02-19 17:47:16,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:16,781 INFO L93 Difference]: Finished difference Result 92 states and 189 transitions. [2021-02-19 17:47:16,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:47:16,781 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 [2021-02-19 17:47:16,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:16,782 INFO L225 Difference]: With dead ends: 92 [2021-02-19 17:47:16,782 INFO L226 Difference]: Without dead ends: 86 [2021-02-19 17:47:16,782 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:47:16,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-02-19 17:47:16,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 81. [2021-02-19 17:47:16,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.1375) internal successors, (171), 80 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:16,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 171 transitions. [2021-02-19 17:47:16,783 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 171 transitions. Word has length 17 [2021-02-19 17:47:16,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:16,783 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 171 transitions. [2021-02-19 17:47:16,783 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) [2021-02-19 17:47:16,783 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 171 transitions. [2021-02-19 17:47:16,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:47:16,783 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:16,783 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:16,988 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable888,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:16,988 INFO L428 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:16,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:16,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1999882339, now seen corresponding path program 156 times [2021-02-19 17:47:16,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:16,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050577599] [2021-02-19 17:47:16,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:16,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:17,056 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:17,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050577599] [2021-02-19 17:47:17,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114154911] [2021-02-19 17:47:17,056 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 [2021-02-19 17:47:17,075 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:47:17,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:17,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:47:17,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:17,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:17,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:17,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:47:17,166 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:17,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:17,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:17,168 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 16 treesize of output 12 [2021-02-19 17:47:17,169 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:17,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:17,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:17,172 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 17 treesize of output 13 [2021-02-19 17:47:17,173 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:17,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:17,179 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 15 treesize of output 11 [2021-02-19 17:47:17,180 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:17,212 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-02-19 17:47:17,213 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:47:17,214 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:47:17,214 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-02-19 17:47:17,240 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:17,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:17,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-02-19 17:47:17,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754846019] [2021-02-19 17:47:17,240 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:47:17,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:17,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:47:17,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:47:17,241 INFO L87 Difference]: Start difference. First operand 81 states and 171 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) [2021-02-19 17:47:17,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:17,503 INFO L93 Difference]: Finished difference Result 136 states and 274 transitions. [2021-02-19 17:47:17,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:47:17,503 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 [2021-02-19 17:47:17,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:17,504 INFO L225 Difference]: With dead ends: 136 [2021-02-19 17:47:17,504 INFO L226 Difference]: Without dead ends: 136 [2021-02-19 17:47:17,504 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:47:17,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-02-19 17:47:17,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 82. [2021-02-19 17:47:17,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.1604938271604937) internal successors, (175), 81 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) [2021-02-19 17:47:17,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 175 transitions. [2021-02-19 17:47:17,505 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 175 transitions. Word has length 17 [2021-02-19 17:47:17,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:17,505 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 175 transitions. [2021-02-19 17:47:17,505 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) [2021-02-19 17:47:17,505 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 175 transitions. [2021-02-19 17:47:17,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:47:17,505 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:17,505 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:17,706 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable892 [2021-02-19 17:47:17,706 INFO L428 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:17,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:17,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1161061842, now seen corresponding path program 157 times [2021-02-19 17:47:17,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:17,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103912177] [2021-02-19 17:47:17,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:17,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:17,778 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:17,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103912177] [2021-02-19 17:47:17,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058782200] [2021-02-19 17:47:17,778 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 [2021-02-19 17:47:17,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:17,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:47:17,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:17,904 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:17,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:17,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-02-19 17:47:17,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62996293] [2021-02-19 17:47:17,904 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:47:17,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:17,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:47:17,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:47:17,905 INFO L87 Difference]: Start difference. First operand 82 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) [2021-02-19 17:47:18,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:18,198 INFO L93 Difference]: Finished difference Result 116 states and 232 transitions. [2021-02-19 17:47:18,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:47:18,199 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 [2021-02-19 17:47:18,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:18,199 INFO L225 Difference]: With dead ends: 116 [2021-02-19 17:47:18,199 INFO L226 Difference]: Without dead ends: 113 [2021-02-19 17:47:18,199 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:47:18,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-02-19 17:47:18,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 86. [2021-02-19 17:47:18,200 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) [2021-02-19 17:47:18,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 183 transitions. [2021-02-19 17:47:18,200 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 183 transitions. Word has length 17 [2021-02-19 17:47:18,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:18,201 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 183 transitions. [2021-02-19 17:47:18,201 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) [2021-02-19 17:47:18,201 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 183 transitions. [2021-02-19 17:47:18,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:47:18,201 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:18,201 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:18,401 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable902,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:18,401 INFO L428 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:18,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:18,402 INFO L82 PathProgramCache]: Analyzing trace with hash 478487351, now seen corresponding path program 158 times [2021-02-19 17:47:18,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:18,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221336811] [2021-02-19 17:47:18,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:18,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:18,468 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:18,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221336811] [2021-02-19 17:47:18,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768790351] [2021-02-19 17:47:18,468 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 [2021-02-19 17:47:18,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:47:18,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:18,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2021-02-19 17:47:18,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:18,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:18,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:18,554 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 18 treesize of output 14 [2021-02-19 17:47:18,555 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:18,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:18,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:18,558 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 [2021-02-19 17:47:18,559 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:18,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:18,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:18,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:47:18,563 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:18,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:18,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:47:18,566 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:18,611 INFO L628 ElimStorePlain]: treesize reduction 73, result has 38.7 percent of original size [2021-02-19 17:47:18,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:18,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:47:18,614 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:47:18,631 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:18,632 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:47:18,633 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:141, output treesize:22 [2021-02-19 17:47:18,663 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:18,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:18,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-02-19 17:47:18,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058865190] [2021-02-19 17:47:18,664 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:47:18,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:18,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:47:18,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:47:18,664 INFO L87 Difference]: Start difference. First operand 86 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) [2021-02-19 17:47:18,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:18,870 INFO L93 Difference]: Finished difference Result 113 states and 234 transitions. [2021-02-19 17:47:18,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:47:18,870 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 [2021-02-19 17:47:18,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:18,871 INFO L225 Difference]: With dead ends: 113 [2021-02-19 17:47:18,871 INFO L226 Difference]: Without dead ends: 111 [2021-02-19 17:47:18,871 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:47:18,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-02-19 17:47:18,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 86. [2021-02-19 17:47:18,872 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) [2021-02-19 17:47:18,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 182 transitions. [2021-02-19 17:47:18,872 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 182 transitions. Word has length 17 [2021-02-19 17:47:18,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:18,872 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 182 transitions. [2021-02-19 17:47:18,872 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) [2021-02-19 17:47:18,872 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 182 transitions. [2021-02-19 17:47:18,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:47:18,872 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:18,872 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:19,086 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable914 [2021-02-19 17:47:19,086 INFO L428 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:19,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:19,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1552544616, now seen corresponding path program 159 times [2021-02-19 17:47:19,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:19,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107913957] [2021-02-19 17:47:19,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:19,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:19,162 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:19,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107913957] [2021-02-19 17:47:19,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684015471] [2021-02-19 17:47:19,162 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 [2021-02-19 17:47:19,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:47:19,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:19,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:47:19,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:19,287 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:19,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:19,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-02-19 17:47:19,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132255719] [2021-02-19 17:47:19,288 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:47:19,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:19,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:47:19,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:47:19,288 INFO L87 Difference]: Start difference. First operand 86 states and 182 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) [2021-02-19 17:47:19,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:19,526 INFO L93 Difference]: Finished difference Result 99 states and 207 transitions. [2021-02-19 17:47:19,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:47:19,527 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 [2021-02-19 17:47:19,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:19,527 INFO L225 Difference]: With dead ends: 99 [2021-02-19 17:47:19,527 INFO L226 Difference]: Without dead ends: 99 [2021-02-19 17:47:19,527 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:47:19,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-02-19 17:47:19,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 80. [2021-02-19 17:47:19,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.1392405063291138) internal successors, (169), 79 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) [2021-02-19 17:47:19,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 169 transitions. [2021-02-19 17:47:19,528 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 169 transitions. Word has length 17 [2021-02-19 17:47:19,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:19,528 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 169 transitions. [2021-02-19 17:47:19,528 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) [2021-02-19 17:47:19,528 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 169 transitions. [2021-02-19 17:47:19,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:47:19,528 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:19,528 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:19,729 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable918,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:19,729 INFO L428 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:19,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:19,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1707339635, now seen corresponding path program 160 times [2021-02-19 17:47:19,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:19,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674277318] [2021-02-19 17:47:19,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:19,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:19,814 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:19,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674277318] [2021-02-19 17:47:19,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743447878] [2021-02-19 17:47:19,814 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) [2021-02-19 17:47:19,833 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:47:19,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:19,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:47:19,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:19,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:19,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:19,936 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 16 treesize of output 12 [2021-02-19 17:47:19,937 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:19,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:19,940 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 15 treesize of output 11 [2021-02-19 17:47:19,941 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:19,986 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-02-19 17:47:19,987 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:47:19,988 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 [2021-02-19 17:47:19,989 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:20,003 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:20,003 INFO L518 ElimStorePlain]: Eliminatee v_prenex_114 vanished before elimination [2021-02-19 17:47:20,004 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:47:20,004 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-02-19 17:47:20,032 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:20,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:20,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-02-19 17:47:20,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799151757] [2021-02-19 17:47:20,033 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:47:20,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:20,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:47:20,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:47:20,033 INFO L87 Difference]: Start difference. First operand 80 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) [2021-02-19 17:47:20,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:20,289 INFO L93 Difference]: Finished difference Result 118 states and 238 transitions. [2021-02-19 17:47:20,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:47:20,290 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 [2021-02-19 17:47:20,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:20,290 INFO L225 Difference]: With dead ends: 118 [2021-02-19 17:47:20,290 INFO L226 Difference]: Without dead ends: 118 [2021-02-19 17:47:20,290 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:47:20,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-02-19 17:47:20,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 82. [2021-02-19 17:47:20,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.1728395061728394) internal successors, (176), 81 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) [2021-02-19 17:47:20,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 176 transitions. [2021-02-19 17:47:20,292 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 176 transitions. Word has length 17 [2021-02-19 17:47:20,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:20,292 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 176 transitions. [2021-02-19 17:47:20,292 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) [2021-02-19 17:47:20,292 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 176 transitions. [2021-02-19 17:47:20,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:47:20,292 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:20,292 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:20,492 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable930 [2021-02-19 17:47:20,492 INFO L428 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:20,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:20,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1748807164, now seen corresponding path program 161 times [2021-02-19 17:47:20,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:20,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813124203] [2021-02-19 17:47:20,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:20,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:20,555 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:20,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813124203] [2021-02-19 17:47:20,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854278334] [2021-02-19 17:47:20,555 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 [2021-02-19 17:47:20,572 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:47:20,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:20,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:47:20,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:20,691 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:20,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:20,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-02-19 17:47:20,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16987132] [2021-02-19 17:47:20,691 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:47:20,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:20,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:47:20,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:47:20,691 INFO L87 Difference]: Start difference. First operand 82 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) [2021-02-19 17:47:20,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:20,939 INFO L93 Difference]: Finished difference Result 126 states and 252 transitions. [2021-02-19 17:47:20,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:47:20,939 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 [2021-02-19 17:47:20,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:20,940 INFO L225 Difference]: With dead ends: 126 [2021-02-19 17:47:20,940 INFO L226 Difference]: Without dead ends: 123 [2021-02-19 17:47:20,940 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:47:20,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-02-19 17:47:20,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 87. [2021-02-19 17:47:20,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.1744186046511627) internal successors, (187), 86 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) [2021-02-19 17:47:20,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 187 transitions. [2021-02-19 17:47:20,941 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 187 transitions. Word has length 17 [2021-02-19 17:47:20,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:20,941 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 187 transitions. [2021-02-19 17:47:20,941 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) [2021-02-19 17:47:20,941 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 187 transitions. [2021-02-19 17:47:20,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:47:20,942 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:20,942 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:21,142 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable937,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:21,142 INFO L428 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:21,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:21,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1066232673, now seen corresponding path program 162 times [2021-02-19 17:47:21,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:21,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191338530] [2021-02-19 17:47:21,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:21,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:21,211 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:21,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191338530] [2021-02-19 17:47:21,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192383329] [2021-02-19 17:47:21,212 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 [2021-02-19 17:47:21,228 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:47:21,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:21,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:47:21,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:21,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:21,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:21,330 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 15 treesize of output 11 [2021-02-19 17:47:21,331 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:21,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:21,334 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 16 treesize of output 12 [2021-02-19 17:47:21,335 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:21,377 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-02-19 17:47:21,377 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:47:21,379 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 [2021-02-19 17:47:21,380 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:21,393 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:21,393 INFO L518 ElimStorePlain]: Eliminatee v_prenex_117 vanished before elimination [2021-02-19 17:47:21,394 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:47:21,394 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-02-19 17:47:21,421 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:21,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:21,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-02-19 17:47:21,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67545621] [2021-02-19 17:47:21,422 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:47:21,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:21,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:47:21,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:47:21,422 INFO L87 Difference]: Start difference. First operand 87 states and 187 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) [2021-02-19 17:47:21,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:21,774 INFO L93 Difference]: Finished difference Result 118 states and 237 transitions. [2021-02-19 17:47:21,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:47:21,775 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 [2021-02-19 17:47:21,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:21,775 INFO L225 Difference]: With dead ends: 118 [2021-02-19 17:47:21,775 INFO L226 Difference]: Without dead ends: 116 [2021-02-19 17:47:21,775 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:47:21,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-02-19 17:47:21,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 87. [2021-02-19 17:47:21,776 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) [2021-02-19 17:47:21,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 186 transitions. [2021-02-19 17:47:21,776 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 186 transitions. Word has length 17 [2021-02-19 17:47:21,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:21,776 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 186 transitions. [2021-02-19 17:47:21,776 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) [2021-02-19 17:47:21,776 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 186 transitions. [2021-02-19 17:47:21,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:47:21,777 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:21,777 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:21,977 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable948,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:21,977 INFO L428 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:21,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:21,977 INFO L82 PathProgramCache]: Analyzing trace with hash 2140289938, now seen corresponding path program 163 times [2021-02-19 17:47:21,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:21,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652035247] [2021-02-19 17:47:21,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:21,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:22,051 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:22,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652035247] [2021-02-19 17:47:22,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403609806] [2021-02-19 17:47:22,051 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 [2021-02-19 17:47:22,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:22,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:47:22,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:22,195 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:22,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:22,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-02-19 17:47:22,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081333880] [2021-02-19 17:47:22,196 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:47:22,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:22,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:47:22,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:47:22,196 INFO L87 Difference]: Start difference. First operand 87 states and 186 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) [2021-02-19 17:47:22,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:22,479 INFO L93 Difference]: Finished difference Result 132 states and 266 transitions. [2021-02-19 17:47:22,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:47:22,480 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 [2021-02-19 17:47:22,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:22,480 INFO L225 Difference]: With dead ends: 132 [2021-02-19 17:47:22,480 INFO L226 Difference]: Without dead ends: 132 [2021-02-19 17:47:22,480 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:47:22,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-02-19 17:47:22,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 86. [2021-02-19 17:47:22,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.164705882352941) internal successors, (184), 85 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) [2021-02-19 17:47:22,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 184 transitions. [2021-02-19 17:47:22,484 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 184 transitions. Word has length 17 [2021-02-19 17:47:22,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:22,484 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 184 transitions. [2021-02-19 17:47:22,484 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) [2021-02-19 17:47:22,484 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 184 transitions. [2021-02-19 17:47:22,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:47:22,485 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:22,485 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:22,685 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable956 [2021-02-19 17:47:22,685 INFO L428 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:22,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:22,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1079938087, now seen corresponding path program 164 times [2021-02-19 17:47:22,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:22,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366500070] [2021-02-19 17:47:22,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:22,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:22,777 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:22,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366500070] [2021-02-19 17:47:22,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957042034] [2021-02-19 17:47:22,777 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 [2021-02-19 17:47:22,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:47:22,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:22,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2021-02-19 17:47:22,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:22,896 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:22,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:22,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-02-19 17:47:22,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560597115] [2021-02-19 17:47:22,897 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:47:22,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:22,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:47:22,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:47:22,897 INFO L87 Difference]: Start difference. First operand 86 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) [2021-02-19 17:47:23,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:23,094 INFO L93 Difference]: Finished difference Result 94 states and 196 transitions. [2021-02-19 17:47:23,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:47:23,094 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 [2021-02-19 17:47:23,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:23,095 INFO L225 Difference]: With dead ends: 94 [2021-02-19 17:47:23,095 INFO L226 Difference]: Without dead ends: 90 [2021-02-19 17:47:23,095 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:47:23,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-02-19 17:47:23,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 86. [2021-02-19 17:47:23,096 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) [2021-02-19 17:47:23,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 183 transitions. [2021-02-19 17:47:23,096 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 183 transitions. Word has length 17 [2021-02-19 17:47:23,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:23,096 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 183 transitions. [2021-02-19 17:47:23,096 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) [2021-02-19 17:47:23,096 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 183 transitions. [2021-02-19 17:47:23,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:47:23,096 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:23,096 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:23,296 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable968,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:23,297 INFO L428 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:23,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:23,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1605060136, now seen corresponding path program 165 times [2021-02-19 17:47:23,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:23,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911623673] [2021-02-19 17:47:23,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:23,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:23,367 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:23,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911623673] [2021-02-19 17:47:23,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167036134] [2021-02-19 17:47:23,368 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 [2021-02-19 17:47:23,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:47:23,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:23,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:47:23,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:23,475 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:23,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:23,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-02-19 17:47:23,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830760850] [2021-02-19 17:47:23,476 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:47:23,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:23,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:47:23,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:47:23,476 INFO L87 Difference]: Start difference. First operand 86 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) [2021-02-19 17:47:23,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:23,624 INFO L93 Difference]: Finished difference Result 105 states and 219 transitions. [2021-02-19 17:47:23,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:47:23,624 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 [2021-02-19 17:47:23,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:23,625 INFO L225 Difference]: With dead ends: 105 [2021-02-19 17:47:23,625 INFO L226 Difference]: Without dead ends: 105 [2021-02-19 17:47:23,625 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:47:23,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-02-19 17:47:23,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 79. [2021-02-19 17:47:23,626 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) [2021-02-19 17:47:23,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 167 transitions. [2021-02-19 17:47:23,626 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 167 transitions. Word has length 17 [2021-02-19 17:47:23,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:23,626 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 167 transitions. [2021-02-19 17:47:23,626 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) [2021-02-19 17:47:23,626 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 167 transitions. [2021-02-19 17:47:23,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:47:23,626 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:23,626 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:23,826 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable972 [2021-02-19 17:47:23,827 INFO L428 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:23,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:23,827 INFO L82 PathProgramCache]: Analyzing trace with hash -667103837, now seen corresponding path program 166 times [2021-02-19 17:47:23,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:23,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852197257] [2021-02-19 17:47:23,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:23,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:23,900 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:23,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852197257] [2021-02-19 17:47:23,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465163517] [2021-02-19 17:47:23,901 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 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 [2021-02-19 17:47:23,916 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:47:23,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:23,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:47:23,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:24,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:24,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:24,032 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 16 treesize of output 12 [2021-02-19 17:47:24,033 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:24,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:24,035 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 15 treesize of output 11 [2021-02-19 17:47:24,036 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:24,077 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-02-19 17:47:24,078 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:47:24,079 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 8 treesize of output 6 [2021-02-19 17:47:24,080 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:24,094 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:24,094 INFO L518 ElimStorePlain]: Eliminatee v_prenex_121 vanished before elimination [2021-02-19 17:47:24,095 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:47:24,095 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-02-19 17:47:24,134 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:24,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:24,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-02-19 17:47:24,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372257873] [2021-02-19 17:47:24,135 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:47:24,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:24,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:47:24,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:47:24,135 INFO L87 Difference]: Start difference. First operand 79 states and 167 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) [2021-02-19 17:47:24,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:24,426 INFO L93 Difference]: Finished difference Result 103 states and 204 transitions. [2021-02-19 17:47:24,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:47:24,426 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 [2021-02-19 17:47:24,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:24,427 INFO L225 Difference]: With dead ends: 103 [2021-02-19 17:47:24,427 INFO L226 Difference]: Without dead ends: 103 [2021-02-19 17:47:24,427 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:47:24,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-02-19 17:47:24,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 79. [2021-02-19 17:47:24,428 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) [2021-02-19 17:47:24,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 167 transitions. [2021-02-19 17:47:24,428 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 167 transitions. Word has length 17 [2021-02-19 17:47:24,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:24,428 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 167 transitions. [2021-02-19 17:47:24,428 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) [2021-02-19 17:47:24,428 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 167 transitions. [2021-02-19 17:47:24,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:47:24,428 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:24,428 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:24,629 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable976 [2021-02-19 17:47:24,629 INFO L428 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:24,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:24,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1505924334, now seen corresponding path program 167 times [2021-02-19 17:47:24,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:24,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761766416] [2021-02-19 17:47:24,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:24,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:24,685 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:24,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761766416] [2021-02-19 17:47:24,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212099230] [2021-02-19 17:47:24,686 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) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:24,702 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 17:47:24,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:24,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:47:24,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:24,840 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:24,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:24,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-02-19 17:47:24,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062962678] [2021-02-19 17:47:24,840 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:47:24,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:24,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:47:24,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:47:24,840 INFO L87 Difference]: Start difference. First operand 79 states and 167 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) [2021-02-19 17:47:24,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:24,975 INFO L93 Difference]: Finished difference Result 109 states and 214 transitions. [2021-02-19 17:47:24,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:47:24,975 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 [2021-02-19 17:47:24,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:24,976 INFO L225 Difference]: With dead ends: 109 [2021-02-19 17:47:24,976 INFO L226 Difference]: Without dead ends: 106 [2021-02-19 17:47:24,976 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:47:24,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-02-19 17:47:24,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 85. [2021-02-19 17:47:24,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.1547619047619047) internal successors, (181), 84 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) [2021-02-19 17:47:24,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 181 transitions. [2021-02-19 17:47:24,977 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 181 transitions. Word has length 17 [2021-02-19 17:47:24,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:24,977 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 181 transitions. [2021-02-19 17:47:24,977 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) [2021-02-19 17:47:24,977 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 181 transitions. [2021-02-19 17:47:24,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:47:24,977 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:24,977 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:25,177 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable983 [2021-02-19 17:47:25,178 INFO L428 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:25,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:25,182 INFO L82 PathProgramCache]: Analyzing trace with hash 2106468471, now seen corresponding path program 168 times [2021-02-19 17:47:25,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:25,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120242874] [2021-02-19 17:47:25,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:25,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:25,253 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:25,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120242874] [2021-02-19 17:47:25,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916572709] [2021-02-19 17:47:25,253 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 [2021-02-19 17:47:25,270 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:47:25,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:25,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2021-02-19 17:47:25,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:25,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:25,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:25,388 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 [2021-02-19 17:47:25,389 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:25,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:25,392 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 17 treesize of output 13 [2021-02-19 17:47:25,393 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:25,445 INFO L628 ElimStorePlain]: treesize reduction 78, result has 40.5 percent of original size [2021-02-19 17:47:25,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:25,448 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 12 treesize of output 8 [2021-02-19 17:47:25,449 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:47:25,467 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:25,469 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 [2021-02-19 17:47:25,470 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:25,486 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:25,486 INFO L518 ElimStorePlain]: Eliminatee v_prenex_125 vanished before elimination [2021-02-19 17:47:25,487 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:47:25,487 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:141, output treesize:22 [2021-02-19 17:47:25,520 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:25,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:25,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-02-19 17:47:25,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284739050] [2021-02-19 17:47:25,520 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:47:25,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:25,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:47:25,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:47:25,521 INFO L87 Difference]: Start difference. First operand 85 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) [2021-02-19 17:47:25,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:25,709 INFO L93 Difference]: Finished difference Result 108 states and 214 transitions. [2021-02-19 17:47:25,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:47:25,709 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 [2021-02-19 17:47:25,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:25,710 INFO L225 Difference]: With dead ends: 108 [2021-02-19 17:47:25,710 INFO L226 Difference]: Without dead ends: 106 [2021-02-19 17:47:25,710 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:47:25,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-02-19 17:47:25,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 85. [2021-02-19 17:47:25,711 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) [2021-02-19 17:47:25,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 180 transitions. [2021-02-19 17:47:25,711 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 180 transitions. Word has length 17 [2021-02-19 17:47:25,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:25,711 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 180 transitions. [2021-02-19 17:47:25,711 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) [2021-02-19 17:47:25,711 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 180 transitions. [2021-02-19 17:47:25,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:47:25,711 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:25,711 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:25,911 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable994 [2021-02-19 17:47:25,912 INFO L428 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:25,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:25,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1114441560, now seen corresponding path program 169 times [2021-02-19 17:47:25,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:25,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636348861] [2021-02-19 17:47:25,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:25,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:25,979 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:25,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636348861] [2021-02-19 17:47:25,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11798654] [2021-02-19 17:47:25,979 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 [2021-02-19 17:47:25,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:25,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:47:25,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:26,142 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:26,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:26,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-02-19 17:47:26,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719644327] [2021-02-19 17:47:26,143 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:47:26,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:26,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:47:26,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:47:26,143 INFO L87 Difference]: Start difference. First operand 85 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) [2021-02-19 17:47:26,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:26,315 INFO L93 Difference]: Finished difference Result 109 states and 216 transitions. [2021-02-19 17:47:26,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:47:26,316 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 [2021-02-19 17:47:26,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:26,316 INFO L225 Difference]: With dead ends: 109 [2021-02-19 17:47:26,316 INFO L226 Difference]: Without dead ends: 109 [2021-02-19 17:47:26,316 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:47:26,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-02-19 17:47:26,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 84. [2021-02-19 17:47:26,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.144578313253012) internal successors, (178), 83 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) [2021-02-19 17:47:26,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 178 transitions. [2021-02-19 17:47:26,317 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 178 transitions. Word has length 17 [2021-02-19 17:47:26,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:26,317 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 178 transitions. [2021-02-19 17:47:26,317 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) [2021-02-19 17:47:26,317 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 178 transitions. [2021-02-19 17:47:26,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:47:26,317 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:26,317 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:26,518 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1001 [2021-02-19 17:47:26,518 INFO L428 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:26,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:26,518 INFO L82 PathProgramCache]: Analyzing trace with hash -39702289, now seen corresponding path program 170 times [2021-02-19 17:47:26,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:26,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618427811] [2021-02-19 17:47:26,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:26,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:26,596 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:26,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618427811] [2021-02-19 17:47:26,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169000019] [2021-02-19 17:47:26,597 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 [2021-02-19 17:47:26,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:47:26,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:26,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2021-02-19 17:47:26,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:26,744 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:26,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:26,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-02-19 17:47:26,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172256016] [2021-02-19 17:47:26,744 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:47:26,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:26,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:47:26,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:47:26,745 INFO L87 Difference]: Start difference. First operand 84 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) [2021-02-19 17:47:26,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:26,902 INFO L93 Difference]: Finished difference Result 92 states and 188 transitions. [2021-02-19 17:47:26,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:47:26,903 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 [2021-02-19 17:47:26,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:26,903 INFO L225 Difference]: With dead ends: 92 [2021-02-19 17:47:26,903 INFO L226 Difference]: Without dead ends: 88 [2021-02-19 17:47:26,903 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:47:26,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-02-19 17:47:26,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 84. [2021-02-19 17:47:26,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.1325301204819276) internal successors, (177), 83 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) [2021-02-19 17:47:26,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 177 transitions. [2021-02-19 17:47:26,904 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 177 transitions. Word has length 17 [2021-02-19 17:47:26,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:26,904 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 177 transitions. [2021-02-19 17:47:26,904 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) [2021-02-19 17:47:26,904 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 177 transitions. [2021-02-19 17:47:26,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:47:26,905 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:26,905 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:27,105 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1013 [2021-02-19 17:47:27,105 INFO L428 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:27,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:27,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1649671362, now seen corresponding path program 171 times [2021-02-19 17:47:27,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:27,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858420907] [2021-02-19 17:47:27,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:27,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:27,164 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:27,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858420907] [2021-02-19 17:47:27,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385280411] [2021-02-19 17:47:27,164 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 [2021-02-19 17:47:27,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:47:27,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:27,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2021-02-19 17:47:27,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:27,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:27,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:27,287 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 [2021-02-19 17:47:27,287 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:27,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:27,290 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 [2021-02-19 17:47:27,291 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:27,310 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-02-19 17:47:27,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:27,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:47:27,314 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:47:27,319 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:27,320 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:47:27,320 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-02-19 17:47:27,339 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:27,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:27,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-02-19 17:47:27,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384013347] [2021-02-19 17:47:27,340 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:47:27,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:27,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:47:27,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:47:27,340 INFO L87 Difference]: Start difference. First operand 84 states and 177 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) [2021-02-19 17:47:27,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:27,434 INFO L93 Difference]: Finished difference Result 104 states and 213 transitions. [2021-02-19 17:47:27,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:47:27,434 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 [2021-02-19 17:47:27,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:27,434 INFO L225 Difference]: With dead ends: 104 [2021-02-19 17:47:27,434 INFO L226 Difference]: Without dead ends: 104 [2021-02-19 17:47:27,435 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:47:27,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-02-19 17:47:27,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 83. [2021-02-19 17:47:27,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.1341463414634148) internal successors, (175), 82 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) [2021-02-19 17:47:27,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 175 transitions. [2021-02-19 17:47:27,436 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 175 transitions. Word has length 17 [2021-02-19 17:47:27,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:27,436 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 175 transitions. [2021-02-19 17:47:27,436 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) [2021-02-19 17:47:27,436 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 175 transitions. [2021-02-19 17:47:27,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:47:27,436 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:27,436 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:27,636 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1017,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:27,636 INFO L428 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:27,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:27,637 INFO L82 PathProgramCache]: Analyzing trace with hash -2146486409, now seen corresponding path program 172 times [2021-02-19 17:47:27,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:27,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818525261] [2021-02-19 17:47:27,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:27,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:27,703 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:27,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818525261] [2021-02-19 17:47:27,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998829451] [2021-02-19 17:47:27,704 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 [2021-02-19 17:47:27,720 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:47:27,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:27,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:47:27,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:27,833 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:27,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:27,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-02-19 17:47:27,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932891186] [2021-02-19 17:47:27,834 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:47:27,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:27,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:47:27,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:47:27,834 INFO L87 Difference]: Start difference. First operand 83 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) [2021-02-19 17:47:28,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:28,085 INFO L93 Difference]: Finished difference Result 89 states and 182 transitions. [2021-02-19 17:47:28,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:47:28,086 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 [2021-02-19 17:47:28,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:28,086 INFO L225 Difference]: With dead ends: 89 [2021-02-19 17:47:28,086 INFO L226 Difference]: Without dead ends: 83 [2021-02-19 17:47:28,086 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:47:28,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-02-19 17:47:28,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-02-19 17:47:28,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.1219512195121952) internal successors, (174), 82 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) [2021-02-19 17:47:28,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 174 transitions. [2021-02-19 17:47:28,087 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 174 transitions. Word has length 17 [2021-02-19 17:47:28,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:28,087 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 174 transitions. [2021-02-19 17:47:28,087 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) [2021-02-19 17:47:28,088 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 174 transitions. [2021-02-19 17:47:28,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:47:28,088 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:28,088 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:28,290 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1019,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:28,290 INFO L428 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:28,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:28,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1061926040, now seen corresponding path program 173 times [2021-02-19 17:47:28,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:28,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113357638] [2021-02-19 17:47:28,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:28,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:28,348 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:28,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113357638] [2021-02-19 17:47:28,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791621882] [2021-02-19 17:47:28,348 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 [2021-02-19 17:47:28,368 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:47:28,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:28,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:47:28,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:28,468 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:28,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:28,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-02-19 17:47:28,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467692699] [2021-02-19 17:47:28,468 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:47:28,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:28,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:47:28,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:47:28,469 INFO L87 Difference]: Start difference. First operand 83 states and 174 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) [2021-02-19 17:47:28,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:28,576 INFO L93 Difference]: Finished difference Result 92 states and 189 transitions. [2021-02-19 17:47:28,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:47:28,577 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 [2021-02-19 17:47:28,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:28,577 INFO L225 Difference]: With dead ends: 92 [2021-02-19 17:47:28,577 INFO L226 Difference]: Without dead ends: 92 [2021-02-19 17:47:28,577 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:47:28,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-02-19 17:47:28,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 75. [2021-02-19 17:47:28,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.0945945945945947) internal successors, (155), 74 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) [2021-02-19 17:47:28,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 155 transitions. [2021-02-19 17:47:28,578 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 155 transitions. Word has length 17 [2021-02-19 17:47:28,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:28,578 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 155 transitions. [2021-02-19 17:47:28,578 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) [2021-02-19 17:47:28,578 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 155 transitions. [2021-02-19 17:47:28,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:47:28,579 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:28,579 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:28,782 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1024 [2021-02-19 17:47:28,782 INFO L428 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:28,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:28,782 INFO L82 PathProgramCache]: Analyzing trace with hash 887711419, now seen corresponding path program 174 times [2021-02-19 17:47:28,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:28,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867725000] [2021-02-19 17:47:28,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:28,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:28,868 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:28,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867725000] [2021-02-19 17:47:28,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519262861] [2021-02-19 17:47:28,869 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 [2021-02-19 17:47:28,887 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:47:28,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:28,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2021-02-19 17:47:28,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:29,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:29,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:29,032 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 18 treesize of output 14 [2021-02-19 17:47:29,033 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:29,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:29,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:47:29,037 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:29,092 INFO L628 ElimStorePlain]: treesize reduction 80, result has 38.9 percent of original size [2021-02-19 17:47:29,092 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:47:29,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:29,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:47:29,095 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:29,113 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:29,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:29,116 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 12 treesize of output 8 [2021-02-19 17:47:29,117 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:47:29,134 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:29,135 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:47:29,135 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:141, output treesize:22 [2021-02-19 17:47:29,178 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:29,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:29,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-02-19 17:47:29,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629295853] [2021-02-19 17:47:29,179 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:47:29,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:29,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:47:29,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:47:29,179 INFO L87 Difference]: Start difference. First operand 75 states and 155 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) [2021-02-19 17:47:29,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:29,381 INFO L93 Difference]: Finished difference Result 102 states and 194 transitions. [2021-02-19 17:47:29,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:47:29,381 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 [2021-02-19 17:47:29,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:29,382 INFO L225 Difference]: With dead ends: 102 [2021-02-19 17:47:29,382 INFO L226 Difference]: Without dead ends: 102 [2021-02-19 17:47:29,382 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:47:29,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-02-19 17:47:29,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 71. [2021-02-19 17:47:29,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 2.0) internal successors, (140), 70 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) [2021-02-19 17:47:29,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 140 transitions. [2021-02-19 17:47:29,383 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 140 transitions. Word has length 17 [2021-02-19 17:47:29,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:29,383 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 140 transitions. [2021-02-19 17:47:29,383 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) [2021-02-19 17:47:29,383 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 140 transitions. [2021-02-19 17:47:29,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:47:29,383 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:29,383 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:29,598 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1028 [2021-02-19 17:47:29,598 INFO L428 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:29,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:29,598 INFO L82 PathProgramCache]: Analyzing trace with hash 254128606, now seen corresponding path program 175 times [2021-02-19 17:47:29,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:29,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571810533] [2021-02-19 17:47:29,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:29,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:29,653 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:29,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571810533] [2021-02-19 17:47:29,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062186273] [2021-02-19 17:47:29,653 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 [2021-02-19 17:47:29,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:29,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:47:29,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:29,827 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:29,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:29,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-02-19 17:47:29,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401572260] [2021-02-19 17:47:29,828 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:47:29,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:29,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:47:29,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:47:29,828 INFO L87 Difference]: Start difference. First operand 71 states and 140 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) [2021-02-19 17:47:30,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:30,031 INFO L93 Difference]: Finished difference Result 113 states and 205 transitions. [2021-02-19 17:47:30,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:47:30,031 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 [2021-02-19 17:47:30,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:30,031 INFO L225 Difference]: With dead ends: 113 [2021-02-19 17:47:30,031 INFO L226 Difference]: Without dead ends: 110 [2021-02-19 17:47:30,032 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:47:30,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-02-19 17:47:30,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 78. [2021-02-19 17:47:30,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.038961038961039) internal successors, (157), 77 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:30,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 157 transitions. [2021-02-19 17:47:30,033 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 157 transitions. Word has length 17 [2021-02-19 17:47:30,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:30,033 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 157 transitions. [2021-02-19 17:47:30,033 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) [2021-02-19 17:47:30,033 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 157 transitions. [2021-02-19 17:47:30,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:47:30,033 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:30,033 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:30,233 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1034 [2021-02-19 17:47:30,233 INFO L428 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:30,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:30,234 INFO L82 PathProgramCache]: Analyzing trace with hash 645611380, now seen corresponding path program 176 times [2021-02-19 17:47:30,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:30,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531657455] [2021-02-19 17:47:30,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:30,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:30,296 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:30,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531657455] [2021-02-19 17:47:30,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952516358] [2021-02-19 17:47:30,296 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 [2021-02-19 17:47:30,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:47:30,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:30,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:47:30,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:30,464 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:30,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:30,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-02-19 17:47:30,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287970170] [2021-02-19 17:47:30,465 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:47:30,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:30,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:47:30,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:47:30,465 INFO L87 Difference]: Start difference. First operand 78 states and 157 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) [2021-02-19 17:47:30,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:30,748 INFO L93 Difference]: Finished difference Result 113 states and 208 transitions. [2021-02-19 17:47:30,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:47:30,748 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 [2021-02-19 17:47:30,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:30,749 INFO L225 Difference]: With dead ends: 113 [2021-02-19 17:47:30,749 INFO L226 Difference]: Without dead ends: 113 [2021-02-19 17:47:30,749 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:47:30,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-02-19 17:47:30,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 77. [2021-02-19 17:47:30,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.039473684210526) internal successors, (155), 76 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) [2021-02-19 17:47:30,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 155 transitions. [2021-02-19 17:47:30,750 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 155 transitions. Word has length 17 [2021-02-19 17:47:30,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:30,750 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 155 transitions. [2021-02-19 17:47:30,750 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) [2021-02-19 17:47:30,750 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 155 transitions. [2021-02-19 17:47:30,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:47:30,750 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:30,750 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:30,950 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1045 [2021-02-19 17:47:30,951 INFO L428 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:30,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:30,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1720350651, now seen corresponding path program 177 times [2021-02-19 17:47:30,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:30,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336555961] [2021-02-19 17:47:30,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:30,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:31,032 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:31,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336555961] [2021-02-19 17:47:31,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752403006] [2021-02-19 17:47:31,033 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 [2021-02-19 17:47:31,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 17:47:31,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:31,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2021-02-19 17:47:31,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:31,227 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:31,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:31,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-02-19 17:47:31,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468076412] [2021-02-19 17:47:31,228 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:47:31,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:31,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:47:31,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:47:31,228 INFO L87 Difference]: Start difference. First operand 77 states and 155 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) [2021-02-19 17:47:31,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:31,423 INFO L93 Difference]: Finished difference Result 98 states and 183 transitions. [2021-02-19 17:47:31,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:47:31,424 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 [2021-02-19 17:47:31,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:31,424 INFO L225 Difference]: With dead ends: 98 [2021-02-19 17:47:31,424 INFO L226 Difference]: Without dead ends: 94 [2021-02-19 17:47:31,424 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:47:31,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-02-19 17:47:31,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 77. [2021-02-19 17:47:31,425 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) [2021-02-19 17:47:31,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 154 transitions. [2021-02-19 17:47:31,425 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 154 transitions. Word has length 17 [2021-02-19 17:47:31,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:31,425 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 154 transitions. [2021-02-19 17:47:31,425 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) [2021-02-19 17:47:31,425 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 154 transitions. [2021-02-19 17:47:31,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:47:31,426 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:31,426 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:31,626 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1055 [2021-02-19 17:47:31,626 INFO L428 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:31,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:31,626 INFO L82 PathProgramCache]: Analyzing trace with hash 110381578, now seen corresponding path program 178 times [2021-02-19 17:47:31,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:31,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862627043] [2021-02-19 17:47:31,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:31,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:31,687 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:31,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862627043] [2021-02-19 17:47:31,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697526284] [2021-02-19 17:47:31,687 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 [2021-02-19 17:47:31,703 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:47:31,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:31,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:47:31,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:31,827 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:31,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:31,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-02-19 17:47:31,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111163206] [2021-02-19 17:47:31,827 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:47:31,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:31,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:47:31,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:47:31,828 INFO L87 Difference]: Start difference. First operand 77 states and 154 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) [2021-02-19 17:47:32,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:32,014 INFO L93 Difference]: Finished difference Result 110 states and 208 transitions. [2021-02-19 17:47:32,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:47:32,014 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 [2021-02-19 17:47:32,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:32,014 INFO L225 Difference]: With dead ends: 110 [2021-02-19 17:47:32,014 INFO L226 Difference]: Without dead ends: 110 [2021-02-19 17:47:32,015 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:47:32,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-02-19 17:47:32,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 76. [2021-02-19 17:47:32,015 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) [2021-02-19 17:47:32,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 152 transitions. [2021-02-19 17:47:32,016 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 152 transitions. Word has length 17 [2021-02-19 17:47:32,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:32,016 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 152 transitions. [2021-02-19 17:47:32,016 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) [2021-02-19 17:47:32,016 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 152 transitions. [2021-02-19 17:47:32,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:47:32,016 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:32,016 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:32,216 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1059 [2021-02-19 17:47:32,216 INFO L428 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:32,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:32,217 INFO L82 PathProgramCache]: Analyzing trace with hash -386433469, now seen corresponding path program 179 times [2021-02-19 17:47:32,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:32,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495139215] [2021-02-19 17:47:32,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:32,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:32,302 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:32,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495139215] [2021-02-19 17:47:32,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113025403] [2021-02-19 17:47:32,302 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 [2021-02-19 17:47:32,319 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:47:32,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:32,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:47:32,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:32,453 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:32,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:32,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-02-19 17:47:32,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946834153] [2021-02-19 17:47:32,454 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:47:32,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:32,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:47:32,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:47:32,454 INFO L87 Difference]: Start difference. First operand 76 states and 152 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) [2021-02-19 17:47:32,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:32,910 INFO L93 Difference]: Finished difference Result 99 states and 183 transitions. [2021-02-19 17:47:32,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:47:32,911 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 [2021-02-19 17:47:32,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:32,911 INFO L225 Difference]: With dead ends: 99 [2021-02-19 17:47:32,911 INFO L226 Difference]: Without dead ends: 93 [2021-02-19 17:47:32,911 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:47:32,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-02-19 17:47:32,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 76. [2021-02-19 17:47:32,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.013333333333333) internal successors, (151), 75 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:32,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 151 transitions. [2021-02-19 17:47:32,912 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 151 transitions. Word has length 17 [2021-02-19 17:47:32,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:32,912 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 151 transitions. [2021-02-19 17:47:32,912 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) [2021-02-19 17:47:32,912 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 151 transitions. [2021-02-19 17:47:32,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:47:32,913 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:32,913 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:33,113 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1063,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:33,113 INFO L428 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:33,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:33,113 INFO L82 PathProgramCache]: Analyzing trace with hash 698126900, now seen corresponding path program 180 times [2021-02-19 17:47:33,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:33,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505680638] [2021-02-19 17:47:33,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:33,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:33,173 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:33,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505680638] [2021-02-19 17:47:33,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212893592] [2021-02-19 17:47:33,173 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 [2021-02-19 17:47:33,190 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:47:33,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:33,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:47:33,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:33,315 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:33,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:33,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-02-19 17:47:33,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708960168] [2021-02-19 17:47:33,315 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:47:33,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:33,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:47:33,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:47:33,315 INFO L87 Difference]: Start difference. First operand 76 states and 151 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) [2021-02-19 17:47:33,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:33,484 INFO L93 Difference]: Finished difference Result 119 states and 226 transitions. [2021-02-19 17:47:33,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:47:33,485 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 [2021-02-19 17:47:33,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:33,485 INFO L225 Difference]: With dead ends: 119 [2021-02-19 17:47:33,485 INFO L226 Difference]: Without dead ends: 119 [2021-02-19 17:47:33,485 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:47:33,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-02-19 17:47:33,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 75. [2021-02-19 17:47:33,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.0135135135135136) internal successors, (149), 74 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:33,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 149 transitions. [2021-02-19 17:47:33,486 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 149 transitions. Word has length 17 [2021-02-19 17:47:33,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:33,486 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 149 transitions. [2021-02-19 17:47:33,486 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) [2021-02-19 17:47:33,486 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 149 transitions. [2021-02-19 17:47:33,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:47:33,486 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:33,487 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:33,687 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1068 [2021-02-19 17:47:33,687 INFO L428 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:33,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:33,687 INFO L82 PathProgramCache]: Analyzing trace with hash 653802329, now seen corresponding path program 181 times [2021-02-19 17:47:33,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:33,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595963617] [2021-02-19 17:47:33,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:33,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:33,748 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:33,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595963617] [2021-02-19 17:47:33,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459148422] [2021-02-19 17:47:33,749 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 [2021-02-19 17:47:33,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:33,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:47:33,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:33,844 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:33,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:33,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-02-19 17:47:33,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42659745] [2021-02-19 17:47:33,845 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:47:33,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:33,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:47:33,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:47:33,845 INFO L87 Difference]: Start difference. First operand 75 states and 149 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) [2021-02-19 17:47:34,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:34,149 INFO L93 Difference]: Finished difference Result 81 states and 156 transitions. [2021-02-19 17:47:34,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:47:34,150 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 [2021-02-19 17:47:34,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:34,150 INFO L225 Difference]: With dead ends: 81 [2021-02-19 17:47:34,150 INFO L226 Difference]: Without dead ends: 73 [2021-02-19 17:47:34,150 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:47:34,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-02-19 17:47:34,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-02-19 17:47:34,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.013888888888889) internal successors, (145), 72 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) [2021-02-19 17:47:34,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 145 transitions. [2021-02-19 17:47:34,151 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 145 transitions. Word has length 17 [2021-02-19 17:47:34,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:34,151 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 145 transitions. [2021-02-19 17:47:34,151 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) [2021-02-19 17:47:34,151 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 145 transitions. [2021-02-19 17:47:34,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:47:34,151 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:34,151 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:34,352 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1072,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:34,352 INFO L428 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:34,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:34,352 INFO L82 PathProgramCache]: Analyzing trace with hash -630570520, now seen corresponding path program 182 times [2021-02-19 17:47:34,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:34,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607580101] [2021-02-19 17:47:34,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:34,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:34,407 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:34,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607580101] [2021-02-19 17:47:34,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51768909] [2021-02-19 17:47:34,408 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 [2021-02-19 17:47:34,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:47:34,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:34,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:47:34,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:34,517 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:34,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:34,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-02-19 17:47:34,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101433935] [2021-02-19 17:47:34,518 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:47:34,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:34,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:47:34,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:47:34,518 INFO L87 Difference]: Start difference. First operand 73 states and 145 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 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) [2021-02-19 17:47:34,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:34,614 INFO L93 Difference]: Finished difference Result 85 states and 166 transitions. [2021-02-19 17:47:34,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:47:34,615 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 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 [2021-02-19 17:47:34,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:34,615 INFO L225 Difference]: With dead ends: 85 [2021-02-19 17:47:34,615 INFO L226 Difference]: Without dead ends: 85 [2021-02-19 17:47:34,615 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:47:34,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-02-19 17:47:34,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 67. [2021-02-19 17:47:34,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.9696969696969697) internal successors, (130), 66 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) [2021-02-19 17:47:34,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 130 transitions. [2021-02-19 17:47:34,616 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 130 transitions. Word has length 17 [2021-02-19 17:47:34,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:34,616 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 130 transitions. [2021-02-19 17:47:34,616 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 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) [2021-02-19 17:47:34,616 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 130 transitions. [2021-02-19 17:47:34,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:47:34,616 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:34,616 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:34,817 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1076,183 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:34,817 INFO L428 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:34,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:34,817 INFO L82 PathProgramCache]: Analyzing trace with hash -165990649, now seen corresponding path program 183 times [2021-02-19 17:47:34,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:34,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016755770] [2021-02-19 17:47:34,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:34,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:35,015 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:35,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016755770] [2021-02-19 17:47:35,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845388175] [2021-02-19 17:47:35,015 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 [2021-02-19 17:47:35,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:47:35,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:35,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:47:35,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:35,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:35,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:35,217 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 27 treesize of output 21 [2021-02-19 17:47:35,218 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:35,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:35,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:47:35,223 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:35,249 INFO L628 ElimStorePlain]: treesize reduction 34, result has 42.4 percent of original size [2021-02-19 17:47:35,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:35,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:47:35,253 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:47:35,261 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:35,262 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:47:35,262 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-02-19 17:47:35,307 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:35,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:35,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-02-19 17:47:35,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090781397] [2021-02-19 17:47:35,308 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:47:35,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:35,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:47:35,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:47:35,308 INFO L87 Difference]: Start difference. First operand 67 states and 130 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) [2021-02-19 17:47:35,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:35,683 INFO L93 Difference]: Finished difference Result 120 states and 223 transitions. [2021-02-19 17:47:35,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:47:35,683 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 [2021-02-19 17:47:35,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:35,684 INFO L225 Difference]: With dead ends: 120 [2021-02-19 17:47:35,684 INFO L226 Difference]: Without dead ends: 96 [2021-02-19 17:47:35,684 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:47:35,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-02-19 17:47:35,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 69. [2021-02-19 17:47:35,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.9705882352941178) internal successors, (134), 68 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:35,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 134 transitions. [2021-02-19 17:47:35,685 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 134 transitions. Word has length 18 [2021-02-19 17:47:35,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:35,685 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 134 transitions. [2021-02-19 17:47:35,685 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) [2021-02-19 17:47:35,685 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 134 transitions. [2021-02-19 17:47:35,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:47:35,685 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:35,685 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:35,885 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1079 [2021-02-19 17:47:35,886 INFO L428 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:35,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:35,886 INFO L82 PathProgramCache]: Analyzing trace with hash 2083013877, now seen corresponding path program 184 times [2021-02-19 17:47:35,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:35,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153007774] [2021-02-19 17:47:35,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:35,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:36,073 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:36,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153007774] [2021-02-19 17:47:36,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045442580] [2021-02-19 17:47:36,074 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 [2021-02-19 17:47:36,091 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:47:36,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:36,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:47:36,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:36,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:36,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:36,288 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 27 treesize of output 21 [2021-02-19 17:47:36,289 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:36,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:36,293 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 27 treesize of output 21 [2021-02-19 17:47:36,294 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:36,319 INFO L628 ElimStorePlain]: treesize reduction 40, result has 38.5 percent of original size [2021-02-19 17:47:36,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:36,321 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 10 treesize of output 6 [2021-02-19 17:47:36,323 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:47:36,331 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:36,332 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:47:36,332 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-02-19 17:47:36,379 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:36,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:36,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-02-19 17:47:36,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872544233] [2021-02-19 17:47:36,379 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:47:36,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:36,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:47:36,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:47:36,380 INFO L87 Difference]: Start difference. First operand 69 states and 134 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) [2021-02-19 17:47:36,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:36,698 INFO L93 Difference]: Finished difference Result 116 states and 216 transitions. [2021-02-19 17:47:36,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:47:36,699 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 [2021-02-19 17:47:36,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:36,699 INFO L225 Difference]: With dead ends: 116 [2021-02-19 17:47:36,699 INFO L226 Difference]: Without dead ends: 97 [2021-02-19 17:47:36,699 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:47:36,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-02-19 17:47:36,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 70. [2021-02-19 17:47:36,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.9710144927536233) internal successors, (136), 69 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) [2021-02-19 17:47:36,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 136 transitions. [2021-02-19 17:47:36,700 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 136 transitions. Word has length 18 [2021-02-19 17:47:36,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:36,700 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 136 transitions. [2021-02-19 17:47:36,700 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) [2021-02-19 17:47:36,700 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 136 transitions. [2021-02-19 17:47:36,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:47:36,701 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:36,701 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:36,901 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1082 [2021-02-19 17:47:36,901 INFO L428 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:36,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:36,901 INFO L82 PathProgramCache]: Analyzing trace with hash 340837643, now seen corresponding path program 185 times [2021-02-19 17:47:36,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:36,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967198280] [2021-02-19 17:47:36,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:36,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:37,073 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:37,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967198280] [2021-02-19 17:47:37,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140506712] [2021-02-19 17:47:37,074 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 [2021-02-19 17:47:37,091 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:47:37,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:37,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:47:37,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:37,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:37,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:37,341 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 27 treesize of output 21 [2021-02-19 17:47:37,342 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:37,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:37,345 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 27 treesize of output 21 [2021-02-19 17:47:37,346 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:37,372 INFO L628 ElimStorePlain]: treesize reduction 34, result has 47.7 percent of original size [2021-02-19 17:47:37,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:37,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:47:37,376 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:37,384 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:37,385 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:47:37,385 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-02-19 17:47:37,436 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:37,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:37,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-02-19 17:47:37,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598213530] [2021-02-19 17:47:37,436 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:47:37,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:37,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:47:37,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:47:37,437 INFO L87 Difference]: Start difference. First operand 70 states and 136 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) [2021-02-19 17:47:37,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:37,764 INFO L93 Difference]: Finished difference Result 114 states and 213 transitions. [2021-02-19 17:47:37,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:47:37,765 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 [2021-02-19 17:47:37,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:37,765 INFO L225 Difference]: With dead ends: 114 [2021-02-19 17:47:37,765 INFO L226 Difference]: Without dead ends: 98 [2021-02-19 17:47:37,765 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:47:37,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-02-19 17:47:37,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 71. [2021-02-19 17:47:37,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.9714285714285715) internal successors, (138), 70 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) [2021-02-19 17:47:37,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 138 transitions. [2021-02-19 17:47:37,766 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 138 transitions. Word has length 18 [2021-02-19 17:47:37,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:37,766 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 138 transitions. [2021-02-19 17:47:37,766 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) [2021-02-19 17:47:37,766 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 138 transitions. [2021-02-19 17:47:37,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:47:37,767 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:37,767 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:37,967 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1086,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:37,967 INFO L428 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:37,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:37,967 INFO L82 PathProgramCache]: Analyzing trace with hash -408098251, now seen corresponding path program 186 times [2021-02-19 17:47:37,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:37,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693668886] [2021-02-19 17:47:37,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:37,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:38,203 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:38,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693668886] [2021-02-19 17:47:38,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130356943] [2021-02-19 17:47:38,203 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 [2021-02-19 17:47:38,221 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:47:38,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:38,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:47:38,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:38,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:38,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:38,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:47:38,453 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:38,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:38,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:47:38,456 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:38,480 INFO L628 ElimStorePlain]: treesize reduction 37, result has 43.1 percent of original size [2021-02-19 17:47:38,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:38,482 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 13 treesize of output 9 [2021-02-19 17:47:38,483 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:47:38,490 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:38,491 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:47:38,491 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-02-19 17:47:38,534 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:38,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:38,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-02-19 17:47:38,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432891392] [2021-02-19 17:47:38,534 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:47:38,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:38,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:47:38,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:47:38,535 INFO L87 Difference]: Start difference. First operand 71 states and 138 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) [2021-02-19 17:47:38,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:38,939 INFO L93 Difference]: Finished difference Result 128 states and 242 transitions. [2021-02-19 17:47:38,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:47:38,939 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 [2021-02-19 17:47:38,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:38,939 INFO L225 Difference]: With dead ends: 128 [2021-02-19 17:47:38,939 INFO L226 Difference]: Without dead ends: 106 [2021-02-19 17:47:38,940 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:47:38,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-02-19 17:47:38,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 73. [2021-02-19 17:47:38,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.9861111111111112) internal successors, (143), 72 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:38,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 143 transitions. [2021-02-19 17:47:38,943 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 143 transitions. Word has length 18 [2021-02-19 17:47:38,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:38,943 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 143 transitions. [2021-02-19 17:47:38,943 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) [2021-02-19 17:47:38,943 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 143 transitions. [2021-02-19 17:47:38,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:47:38,943 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:38,944 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:39,145 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1090,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:39,146 INFO L428 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:39,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:39,146 INFO L82 PathProgramCache]: Analyzing trace with hash 815556699, now seen corresponding path program 187 times [2021-02-19 17:47:39,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:39,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197751275] [2021-02-19 17:47:39,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:39,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:39,341 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:39,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197751275] [2021-02-19 17:47:39,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942586749] [2021-02-19 17:47:39,341 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 [2021-02-19 17:47:39,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:39,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:47:39,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:39,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:39,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:39,528 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 27 treesize of output 21 [2021-02-19 17:47:39,529 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:39,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:39,532 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 27 treesize of output 21 [2021-02-19 17:47:39,533 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:39,557 INFO L628 ElimStorePlain]: treesize reduction 40, result has 38.5 percent of original size [2021-02-19 17:47:39,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:39,563 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 10 treesize of output 6 [2021-02-19 17:47:39,564 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:47:39,572 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:39,573 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:47:39,573 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-02-19 17:47:39,618 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:39,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:39,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-02-19 17:47:39,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474594004] [2021-02-19 17:47:39,619 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:47:39,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:39,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:47:39,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:47:39,619 INFO L87 Difference]: Start difference. First operand 73 states and 143 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) [2021-02-19 17:47:39,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:39,836 INFO L93 Difference]: Finished difference Result 94 states and 176 transitions. [2021-02-19 17:47:39,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:47:39,836 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 [2021-02-19 17:47:39,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:39,837 INFO L225 Difference]: With dead ends: 94 [2021-02-19 17:47:39,837 INFO L226 Difference]: Without dead ends: 75 [2021-02-19 17:47:39,837 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:47:39,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-02-19 17:47:39,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-02-19 17:47:39,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.9864864864864864) internal successors, (147), 74 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:39,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 147 transitions. [2021-02-19 17:47:39,838 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 147 transitions. Word has length 18 [2021-02-19 17:47:39,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:39,838 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 147 transitions. [2021-02-19 17:47:39,838 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) [2021-02-19 17:47:39,838 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 147 transitions. [2021-02-19 17:47:39,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:47:39,838 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:39,838 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:40,039 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1093,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:40,039 INFO L428 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:40,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:40,039 INFO L82 PathProgramCache]: Analyzing trace with hash -926619535, now seen corresponding path program 188 times [2021-02-19 17:47:40,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:40,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705679371] [2021-02-19 17:47:40,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:40,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:40,191 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:40,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705679371] [2021-02-19 17:47:40,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443649326] [2021-02-19 17:47:40,191 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 [2021-02-19 17:47:40,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:47:40,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:40,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:47:40,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:40,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:40,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:40,397 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 19 treesize of output 15 [2021-02-19 17:47:40,398 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:40,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:40,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:47:40,401 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:40,426 INFO L628 ElimStorePlain]: treesize reduction 34, result has 45.2 percent of original size [2021-02-19 17:47:40,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:40,428 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 [2021-02-19 17:47:40,430 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:47:40,437 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:40,439 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:47:40,439 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-02-19 17:47:40,480 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:40,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:40,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-02-19 17:47:40,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750694774] [2021-02-19 17:47:40,480 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:47:40,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:40,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:47:40,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:47:40,481 INFO L87 Difference]: Start difference. First operand 75 states and 147 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) [2021-02-19 17:47:40,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:40,700 INFO L93 Difference]: Finished difference Result 92 states and 173 transitions. [2021-02-19 17:47:40,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:47:40,700 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 [2021-02-19 17:47:40,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:40,701 INFO L225 Difference]: With dead ends: 92 [2021-02-19 17:47:40,701 INFO L226 Difference]: Without dead ends: 76 [2021-02-19 17:47:40,701 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:47:40,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-02-19 17:47:40,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2021-02-19 17:47:40,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.9866666666666666) internal successors, (149), 75 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:40,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 149 transitions. [2021-02-19 17:47:40,702 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 149 transitions. Word has length 18 [2021-02-19 17:47:40,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:40,702 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 149 transitions. [2021-02-19 17:47:40,702 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) [2021-02-19 17:47:40,702 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 149 transitions. [2021-02-19 17:47:40,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:47:40,702 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:40,702 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:40,903 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1096,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:40,903 INFO L428 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:40,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:40,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1675555429, now seen corresponding path program 189 times [2021-02-19 17:47:40,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:40,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330629246] [2021-02-19 17:47:40,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:40,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:41,093 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:41,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330629246] [2021-02-19 17:47:41,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225149189] [2021-02-19 17:47:41,093 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 [2021-02-19 17:47:41,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:47:41,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:41,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:47:41,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:41,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:41,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:41,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:47:41,332 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:41,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:41,335 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 19 treesize of output 15 [2021-02-19 17:47:41,335 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:41,357 INFO L628 ElimStorePlain]: treesize reduction 34, result has 45.2 percent of original size [2021-02-19 17:47:41,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:41,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:47:41,360 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:47:41,367 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:41,368 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:47:41,368 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-02-19 17:47:41,406 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:41,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:41,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-02-19 17:47:41,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024717121] [2021-02-19 17:47:41,407 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:47:41,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:41,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:47:41,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:47:41,407 INFO L87 Difference]: Start difference. First operand 76 states and 149 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) [2021-02-19 17:47:41,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:41,678 INFO L93 Difference]: Finished difference Result 93 states and 179 transitions. [2021-02-19 17:47:41,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:47:41,678 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 [2021-02-19 17:47:41,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:41,679 INFO L225 Difference]: With dead ends: 93 [2021-02-19 17:47:41,679 INFO L226 Difference]: Without dead ends: 80 [2021-02-19 17:47:41,679 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:47:41,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-02-19 17:47:41,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 77. [2021-02-19 17:47:41,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.986842105263158) internal successors, (151), 76 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:41,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 151 transitions. [2021-02-19 17:47:41,680 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 151 transitions. Word has length 18 [2021-02-19 17:47:41,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:41,680 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 151 transitions. [2021-02-19 17:47:41,680 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) [2021-02-19 17:47:41,680 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 151 transitions. [2021-02-19 17:47:41,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:47:41,680 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:41,680 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:41,880 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1099 [2021-02-19 17:47:41,881 INFO L428 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:41,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:41,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1284072655, now seen corresponding path program 190 times [2021-02-19 17:47:41,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:41,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109046331] [2021-02-19 17:47:41,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:41,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:42,103 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:42,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109046331] [2021-02-19 17:47:42,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553825966] [2021-02-19 17:47:42,104 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) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:42,121 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:47:42,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:42,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:47:42,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:42,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:42,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:42,305 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 19 treesize of output 15 [2021-02-19 17:47:42,306 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:42,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:42,310 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 19 treesize of output 15 [2021-02-19 17:47:42,311 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:42,389 INFO L628 ElimStorePlain]: treesize reduction 88, result has 45.0 percent of original size [2021-02-19 17:47:42,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:42,392 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 10 treesize of output 6 [2021-02-19 17:47:42,394 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:47:42,422 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:42,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:42,425 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 19 treesize of output 15 [2021-02-19 17:47:42,426 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:42,452 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:42,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:42,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:47:42,457 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:47:42,481 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:42,486 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:47:42,486 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-02-19 17:47:42,585 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:42,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:42,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-02-19 17:47:42,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772667228] [2021-02-19 17:47:42,585 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:47:42,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:42,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:47:42,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:47:42,586 INFO L87 Difference]: Start difference. First operand 77 states and 151 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) [2021-02-19 17:47:42,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:42,944 INFO L93 Difference]: Finished difference Result 112 states and 206 transitions. [2021-02-19 17:47:42,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:47:42,944 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 [2021-02-19 17:47:42,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:42,944 INFO L225 Difference]: With dead ends: 112 [2021-02-19 17:47:42,944 INFO L226 Difference]: Without dead ends: 93 [2021-02-19 17:47:42,944 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:47:42,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-02-19 17:47:42,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 79. [2021-02-19 17:47:42,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.0128205128205128) internal successors, (157), 78 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:42,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 157 transitions. [2021-02-19 17:47:42,945 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 157 transitions. Word has length 18 [2021-02-19 17:47:42,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:42,946 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 157 transitions. [2021-02-19 17:47:42,946 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) [2021-02-19 17:47:42,946 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 157 transitions. [2021-02-19 17:47:42,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:47:42,946 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:42,946 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:43,146 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1103 [2021-02-19 17:47:43,146 INFO L428 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:43,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:43,147 INFO L82 PathProgramCache]: Analyzing trace with hash 113616263, now seen corresponding path program 191 times [2021-02-19 17:47:43,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:43,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356274709] [2021-02-19 17:47:43,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:43,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:43,324 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:43,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356274709] [2021-02-19 17:47:43,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156183212] [2021-02-19 17:47:43,324 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 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 [2021-02-19 17:47:43,344 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:47:43,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:43,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:47:43,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:43,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:43,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:43,517 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 27 treesize of output 21 [2021-02-19 17:47:43,518 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:43,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:43,521 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 [2021-02-19 17:47:43,522 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:43,547 INFO L628 ElimStorePlain]: treesize reduction 40, result has 38.5 percent of original size [2021-02-19 17:47:43,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:43,550 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 10 treesize of output 6 [2021-02-19 17:47:43,551 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:47:43,559 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:43,560 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:47:43,560 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-02-19 17:47:43,606 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:43,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:43,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-02-19 17:47:43,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833834613] [2021-02-19 17:47:43,606 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:47:43,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:43,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:47:43,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:47:43,606 INFO L87 Difference]: Start difference. First operand 79 states and 157 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) [2021-02-19 17:47:43,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:43,940 INFO L93 Difference]: Finished difference Result 99 states and 189 transitions. [2021-02-19 17:47:43,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:47:43,941 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 [2021-02-19 17:47:43,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:43,941 INFO L225 Difference]: With dead ends: 99 [2021-02-19 17:47:43,941 INFO L226 Difference]: Without dead ends: 83 [2021-02-19 17:47:43,941 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:47:43,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-02-19 17:47:43,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-02-19 17:47:43,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.0121951219512195) internal successors, (165), 82 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) [2021-02-19 17:47:43,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 165 transitions. [2021-02-19 17:47:43,942 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 165 transitions. Word has length 18 [2021-02-19 17:47:43,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:43,942 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 165 transitions. [2021-02-19 17:47:43,942 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) [2021-02-19 17:47:43,942 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 165 transitions. [2021-02-19 17:47:43,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:47:43,942 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:43,942 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:44,143 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1108,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:44,143 INFO L428 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:44,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:44,143 INFO L82 PathProgramCache]: Analyzing trace with hash -635319631, now seen corresponding path program 192 times [2021-02-19 17:47:44,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:44,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80003633] [2021-02-19 17:47:44,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:44,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:44,349 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:44,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80003633] [2021-02-19 17:47:44,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568188165] [2021-02-19 17:47:44,350 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 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 [2021-02-19 17:47:44,373 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:47:44,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:44,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:47:44,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:44,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:44,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:44,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:47:44,565 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:44,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:44,568 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 27 treesize of output 21 [2021-02-19 17:47:44,569 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:44,599 INFO L628 ElimStorePlain]: treesize reduction 40, result has 43.7 percent of original size [2021-02-19 17:47:44,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:44,602 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 21 treesize of output 13 [2021-02-19 17:47:44,603 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:44,611 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:44,612 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:47:44,613 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-02-19 17:47:44,663 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:44,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:44,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-02-19 17:47:44,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573258188] [2021-02-19 17:47:44,664 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:47:44,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:44,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:47:44,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:47:44,664 INFO L87 Difference]: Start difference. First operand 83 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) [2021-02-19 17:47:45,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:45,139 INFO L93 Difference]: Finished difference Result 101 states and 197 transitions. [2021-02-19 17:47:45,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:47:45,139 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 [2021-02-19 17:47:45,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:45,140 INFO L225 Difference]: With dead ends: 101 [2021-02-19 17:47:45,140 INFO L226 Difference]: Without dead ends: 88 [2021-02-19 17:47:45,140 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:47:45,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-02-19 17:47:45,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 84. [2021-02-19 17:47:45,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.0120481927710845) internal successors, (167), 83 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) [2021-02-19 17:47:45,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 167 transitions. [2021-02-19 17:47:45,141 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 167 transitions. Word has length 18 [2021-02-19 17:47:45,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:45,141 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 167 transitions. [2021-02-19 17:47:45,141 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) [2021-02-19 17:47:45,141 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 167 transitions. [2021-02-19 17:47:45,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:47:45,141 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:45,141 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:45,341 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1112 [2021-02-19 17:47:45,342 INFO L428 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:45,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:45,342 INFO L82 PathProgramCache]: Analyzing trace with hash -243836857, now seen corresponding path program 193 times [2021-02-19 17:47:45,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:45,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751485343] [2021-02-19 17:47:45,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:45,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:45,617 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:45,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751485343] [2021-02-19 17:47:45,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315999316] [2021-02-19 17:47:45,618 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 [2021-02-19 17:47:45,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:45,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:47:45,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:45,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:45,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:45,798 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 [2021-02-19 17:47:45,799 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:45,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:45,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:47:45,804 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:45,876 INFO L628 ElimStorePlain]: treesize reduction 85, result has 46.9 percent of original size [2021-02-19 17:47:45,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:45,882 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 13 treesize of output 9 [2021-02-19 17:47:45,885 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:47:45,914 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:45,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:45,920 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 [2021-02-19 17:47:45,921 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:45,950 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:45,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:45,954 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 [2021-02-19 17:47:45,955 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:47:45,978 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:45,979 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:47:45,979 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-02-19 17:47:46,063 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:46,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:46,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-02-19 17:47:46,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534033513] [2021-02-19 17:47:46,064 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:47:46,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:46,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:47:46,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:47:46,064 INFO L87 Difference]: Start difference. First operand 84 states and 167 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) [2021-02-19 17:47:46,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:46,663 INFO L93 Difference]: Finished difference Result 121 states and 226 transitions. [2021-02-19 17:47:46,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:47:46,663 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 [2021-02-19 17:47:46,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:46,664 INFO L225 Difference]: With dead ends: 121 [2021-02-19 17:47:46,664 INFO L226 Difference]: Without dead ends: 102 [2021-02-19 17:47:46,664 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:47:46,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-02-19 17:47:46,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 82. [2021-02-19 17:47:46,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.0123456790123457) internal successors, (163), 81 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) [2021-02-19 17:47:46,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 163 transitions. [2021-02-19 17:47:46,665 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 163 transitions. Word has length 18 [2021-02-19 17:47:46,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:46,665 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 163 transitions. [2021-02-19 17:47:46,665 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) [2021-02-19 17:47:46,665 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 163 transitions. [2021-02-19 17:47:46,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:47:46,665 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:46,665 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:46,865 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1115,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:46,866 INFO L428 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:46,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:46,866 INFO L82 PathProgramCache]: Analyzing trace with hash -47574309, now seen corresponding path program 194 times [2021-02-19 17:47:46,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:46,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223002501] [2021-02-19 17:47:46,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:46,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:47,037 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:47,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223002501] [2021-02-19 17:47:47,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143075612] [2021-02-19 17:47:47,038 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 [2021-02-19 17:47:47,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:47:47,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:47,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:47:47,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:47,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:47,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:47,217 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 27 treesize of output 21 [2021-02-19 17:47:47,218 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:47,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:47,221 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 27 treesize of output 21 [2021-02-19 17:47:47,222 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:47,248 INFO L628 ElimStorePlain]: treesize reduction 40, result has 38.5 percent of original size [2021-02-19 17:47:47,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:47,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:47:47,252 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:47:47,260 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:47,261 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:47:47,262 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-02-19 17:47:47,306 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:47,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:47,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-02-19 17:47:47,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071866383] [2021-02-19 17:47:47,307 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:47:47,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:47,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:47:47,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:47:47,307 INFO L87 Difference]: Start difference. First operand 82 states and 163 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) [2021-02-19 17:47:47,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:47,784 INFO L93 Difference]: Finished difference Result 106 states and 207 transitions. [2021-02-19 17:47:47,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:47:47,785 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 [2021-02-19 17:47:47,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:47,785 INFO L225 Difference]: With dead ends: 106 [2021-02-19 17:47:47,785 INFO L226 Difference]: Without dead ends: 93 [2021-02-19 17:47:47,785 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:47:47,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-02-19 17:47:47,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 89. [2021-02-19 17:47:47,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 2.0113636363636362) internal successors, (177), 88 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) [2021-02-19 17:47:47,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 177 transitions. [2021-02-19 17:47:47,786 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 177 transitions. Word has length 18 [2021-02-19 17:47:47,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:47,786 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 177 transitions. [2021-02-19 17:47:47,786 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) [2021-02-19 17:47:47,786 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 177 transitions. [2021-02-19 17:47:47,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:47:47,787 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:47,787 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:47,987 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1120,195 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:47,987 INFO L428 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:47,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:47,987 INFO L82 PathProgramCache]: Analyzing trace with hash 343908465, now seen corresponding path program 195 times [2021-02-19 17:47:47,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:47,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662312312] [2021-02-19 17:47:47,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:47,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:48,200 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:48,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662312312] [2021-02-19 17:47:48,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635921919] [2021-02-19 17:47:48,200 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 [2021-02-19 17:47:48,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:47:48,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:48,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-02-19 17:47:48,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:48,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:48,348 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 [2021-02-19 17:47:48,349 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:48,376 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:48,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:48,380 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 13 treesize of output 9 [2021-02-19 17:47:48,381 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:47:48,410 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:48,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:48,414 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 [2021-02-19 17:47:48,415 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:48,441 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:48,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:48,445 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 13 treesize of output 9 [2021-02-19 17:47:48,446 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:47:48,470 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:48,471 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:47:48,471 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:35 [2021-02-19 17:47:48,556 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:48,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:48,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-02-19 17:47:48,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802300260] [2021-02-19 17:47:48,556 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:47:48,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:48,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:47:48,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:47:48,557 INFO L87 Difference]: Start difference. First operand 89 states and 177 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) [2021-02-19 17:47:49,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:49,141 INFO L93 Difference]: Finished difference Result 108 states and 215 transitions. [2021-02-19 17:47:49,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 17:47:49,142 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 [2021-02-19 17:47:49,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:49,142 INFO L225 Difference]: With dead ends: 108 [2021-02-19 17:47:49,142 INFO L226 Difference]: Without dead ends: 99 [2021-02-19 17:47:49,142 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:47:49,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-02-19 17:47:49,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 88. [2021-02-19 17:47:49,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 2.0114942528735633) internal successors, (175), 87 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) [2021-02-19 17:47:49,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 175 transitions. [2021-02-19 17:47:49,143 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 175 transitions. Word has length 18 [2021-02-19 17:47:49,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:49,143 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 175 transitions. [2021-02-19 17:47:49,143 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) [2021-02-19 17:47:49,143 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 175 transitions. [2021-02-19 17:47:49,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:47:49,143 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:49,143 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:49,344 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1123 [2021-02-19 17:47:49,344 INFO L428 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:49,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:49,344 INFO L82 PathProgramCache]: Analyzing trace with hash -191321337, now seen corresponding path program 196 times [2021-02-19 17:47:49,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:49,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498351469] [2021-02-19 17:47:49,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:49,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:49,530 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:49,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498351469] [2021-02-19 17:47:49,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591193017] [2021-02-19 17:47:49,530 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 [2021-02-19 17:47:49,547 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:47:49,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:49,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:47:49,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:49,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:49,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:49,649 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 [2021-02-19 17:47:49,650 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:49,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:49,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:49,654 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 19 treesize of output 15 [2021-02-19 17:47:49,655 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:49,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:49,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:49,660 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 19 treesize of output 15 [2021-02-19 17:47:49,661 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:49,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:49,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:47:49,665 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:49,734 INFO L628 ElimStorePlain]: treesize reduction 83, result has 45.8 percent of original size [2021-02-19 17:47:49,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:49,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:49,738 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 13 treesize of output 9 [2021-02-19 17:47:49,740 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:47:49,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:49,743 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 [2021-02-19 17:47:49,745 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:47:49,772 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:49,773 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:47:49,773 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-02-19 17:47:49,859 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:49,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:49,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-02-19 17:47:49,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521344856] [2021-02-19 17:47:49,860 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:47:49,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:49,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:47:49,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:47:49,860 INFO L87 Difference]: Start difference. First operand 88 states and 175 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) [2021-02-19 17:47:50,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:50,356 INFO L93 Difference]: Finished difference Result 115 states and 228 transitions. [2021-02-19 17:47:50,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 17:47:50,357 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 [2021-02-19 17:47:50,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:50,357 INFO L225 Difference]: With dead ends: 115 [2021-02-19 17:47:50,357 INFO L226 Difference]: Without dead ends: 103 [2021-02-19 17:47:50,357 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2021-02-19 17:47:50,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-02-19 17:47:50,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 90. [2021-02-19 17:47:50,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.0224719101123596) internal successors, (180), 89 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) [2021-02-19 17:47:50,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 180 transitions. [2021-02-19 17:47:50,358 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 180 transitions. Word has length 18 [2021-02-19 17:47:50,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:50,358 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 180 transitions. [2021-02-19 17:47:50,358 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) [2021-02-19 17:47:50,358 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 180 transitions. [2021-02-19 17:47:50,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:47:50,358 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:50,359 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:50,559 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1128 [2021-02-19 17:47:50,559 INFO L428 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:50,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:50,559 INFO L82 PathProgramCache]: Analyzing trace with hash 179089845, now seen corresponding path program 197 times [2021-02-19 17:47:50,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:50,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064086820] [2021-02-19 17:47:50,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:50,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:50,744 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:50,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064086820] [2021-02-19 17:47:50,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731244986] [2021-02-19 17:47:50,745 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 [2021-02-19 17:47:50,772 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:47:50,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:50,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:47:50,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:50,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:50,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:50,969 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 27 treesize of output 21 [2021-02-19 17:47:50,970 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:50,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:50,973 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 27 treesize of output 21 [2021-02-19 17:47:50,974 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:50,998 INFO L628 ElimStorePlain]: treesize reduction 40, result has 38.5 percent of original size [2021-02-19 17:47:51,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:51,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:47:51,002 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:47:51,010 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:51,012 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:47:51,012 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-02-19 17:47:51,060 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:51,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:51,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-02-19 17:47:51,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957339849] [2021-02-19 17:47:51,061 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 17:47:51,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:51,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 17:47:51,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:47:51,061 INFO L87 Difference]: Start difference. First operand 90 states and 180 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) [2021-02-19 17:47:51,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:51,281 INFO L93 Difference]: Finished difference Result 112 states and 214 transitions. [2021-02-19 17:47:51,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:47:51,281 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 [2021-02-19 17:47:51,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:51,282 INFO L225 Difference]: With dead ends: 112 [2021-02-19 17:47:51,282 INFO L226 Difference]: Without dead ends: 93 [2021-02-19 17:47:51,282 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:47:51,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-02-19 17:47:51,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 91. [2021-02-19 17:47:51,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 2.022222222222222) internal successors, (182), 90 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) [2021-02-19 17:47:51,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 182 transitions. [2021-02-19 17:47:51,283 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 182 transitions. Word has length 18 [2021-02-19 17:47:51,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:51,283 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 182 transitions. [2021-02-19 17:47:51,283 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) [2021-02-19 17:47:51,283 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 182 transitions. [2021-02-19 17:47:51,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:47:51,283 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:51,283 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:51,483 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1131,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:51,484 INFO L428 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:51,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:51,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1563086389, now seen corresponding path program 198 times [2021-02-19 17:47:51,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:51,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411038742] [2021-02-19 17:47:51,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:51,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:51,694 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:51,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411038742] [2021-02-19 17:47:51,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388603615] [2021-02-19 17:47:51,695 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 [2021-02-19 17:47:51,714 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:47:51,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:51,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:47:51,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:51,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:51,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:51,935 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 19 treesize of output 15 [2021-02-19 17:47:51,936 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:51,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:51,939 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 [2021-02-19 17:47:51,940 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:51,965 INFO L628 ElimStorePlain]: treesize reduction 37, result has 40.3 percent of original size [2021-02-19 17:47:51,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:51,968 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 10 treesize of output 6 [2021-02-19 17:47:51,969 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:47:51,977 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:51,979 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:47:51,979 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-02-19 17:47:52,022 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:52,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:52,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-02-19 17:47:52,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114243900] [2021-02-19 17:47:52,022 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:47:52,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:52,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:47:52,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:47:52,023 INFO L87 Difference]: Start difference. First operand 91 states and 182 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) [2021-02-19 17:47:52,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:52,278 INFO L93 Difference]: Finished difference Result 110 states and 211 transitions. [2021-02-19 17:47:52,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:47:52,278 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 [2021-02-19 17:47:52,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:52,279 INFO L225 Difference]: With dead ends: 110 [2021-02-19 17:47:52,279 INFO L226 Difference]: Without dead ends: 94 [2021-02-19 17:47:52,279 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:47:52,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-02-19 17:47:52,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2021-02-19 17:47:52,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.021978021978022) internal successors, (184), 91 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) [2021-02-19 17:47:52,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 184 transitions. [2021-02-19 17:47:52,280 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 184 transitions. Word has length 18 [2021-02-19 17:47:52,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:52,280 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 184 transitions. [2021-02-19 17:47:52,280 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) [2021-02-19 17:47:52,280 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 184 transitions. [2021-02-19 17:47:52,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:47:52,280 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:52,280 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:52,481 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1134,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:52,481 INFO L428 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:52,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:52,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1982945013, now seen corresponding path program 199 times [2021-02-19 17:47:52,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:52,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420457066] [2021-02-19 17:47:52,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:52,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:52,705 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:52,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420457066] [2021-02-19 17:47:52,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876893225] [2021-02-19 17:47:52,706 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 [2021-02-19 17:47:52,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:52,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:47:52,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:52,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:52,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:52,942 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 27 treesize of output 21 [2021-02-19 17:47:52,943 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:52,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:52,945 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 27 treesize of output 21 [2021-02-19 17:47:52,946 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:52,969 INFO L628 ElimStorePlain]: treesize reduction 40, result has 38.5 percent of original size [2021-02-19 17:47:52,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:52,971 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 10 treesize of output 6 [2021-02-19 17:47:52,973 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:47:52,980 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:52,981 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:47:52,981 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-02-19 17:47:53,032 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:53,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:53,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-02-19 17:47:53,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758773840] [2021-02-19 17:47:53,033 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 17:47:53,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:53,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 17:47:53,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:47:53,033 INFO L87 Difference]: Start difference. First operand 92 states and 184 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) [2021-02-19 17:47:53,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:53,432 INFO L93 Difference]: Finished difference Result 112 states and 219 transitions. [2021-02-19 17:47:53,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:47:53,433 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 [2021-02-19 17:47:53,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:53,433 INFO L225 Difference]: With dead ends: 112 [2021-02-19 17:47:53,433 INFO L226 Difference]: Without dead ends: 99 [2021-02-19 17:47:53,433 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:47:53,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-02-19 17:47:53,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 93. [2021-02-19 17:47:53,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.0217391304347827) internal successors, (186), 92 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) [2021-02-19 17:47:53,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 186 transitions. [2021-02-19 17:47:53,434 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 186 transitions. Word has length 18 [2021-02-19 17:47:53,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:53,434 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 186 transitions. [2021-02-19 17:47:53,434 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) [2021-02-19 17:47:53,435 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 186 transitions. [2021-02-19 17:47:53,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:47:53,435 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:53,435 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:53,635 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1138 [2021-02-19 17:47:53,635 INFO L428 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:53,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:53,635 INFO L82 PathProgramCache]: Analyzing trace with hash -1920539509, now seen corresponding path program 200 times [2021-02-19 17:47:53,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:53,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070969096] [2021-02-19 17:47:53,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:53,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:53,898 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:53,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070969096] [2021-02-19 17:47:53,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254855318] [2021-02-19 17:47:53,898 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 [2021-02-19 17:47:53,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:47:53,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:53,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:47:53,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:54,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:54,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:54,120 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 [2021-02-19 17:47:54,121 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:54,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:54,124 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 [2021-02-19 17:47:54,125 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:54,193 INFO L628 ElimStorePlain]: treesize reduction 88, result has 45.0 percent of original size [2021-02-19 17:47:54,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:54,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:47:54,197 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:47:54,223 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:54,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:54,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:47:54,226 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:54,250 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:54,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:54,253 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 10 treesize of output 6 [2021-02-19 17:47:54,254 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:47:54,279 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:54,280 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:47:54,280 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-02-19 17:47:54,379 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:54,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:54,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-02-19 17:47:54,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287021199] [2021-02-19 17:47:54,379 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 17:47:54,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:54,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 17:47:54,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:47:54,380 INFO L87 Difference]: Start difference. First operand 93 states and 186 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) [2021-02-19 17:47:54,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:54,902 INFO L93 Difference]: Finished difference Result 132 states and 248 transitions. [2021-02-19 17:47:54,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:47:54,903 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 [2021-02-19 17:47:54,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:54,903 INFO L225 Difference]: With dead ends: 132 [2021-02-19 17:47:54,903 INFO L226 Difference]: Without dead ends: 113 [2021-02-19 17:47:54,904 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:47:54,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-02-19 17:47:54,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 89. [2021-02-19 17:47:54,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 2.022727272727273) internal successors, (178), 88 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) [2021-02-19 17:47:54,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 178 transitions. [2021-02-19 17:47:54,905 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 178 transitions. Word has length 18 [2021-02-19 17:47:54,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:54,905 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 178 transitions. [2021-02-19 17:47:54,905 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) [2021-02-19 17:47:54,905 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 178 transitions. [2021-02-19 17:47:54,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:47:54,905 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:54,905 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:55,105 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1142,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:55,105 INFO L428 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:55,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:55,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1659688075, now seen corresponding path program 201 times [2021-02-19 17:47:55,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:55,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740523368] [2021-02-19 17:47:55,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:55,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:55,275 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:55,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740523368] [2021-02-19 17:47:55,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006372765] [2021-02-19 17:47:55,275 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 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 [2021-02-19 17:47:55,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:47:55,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:55,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:47:55,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:55,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:55,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:55,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:47:55,496 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:55,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:55,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:47:55,501 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:55,531 INFO L628 ElimStorePlain]: treesize reduction 40, result has 38.5 percent of original size [2021-02-19 17:47:55,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:55,533 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 10 treesize of output 6 [2021-02-19 17:47:55,535 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:47:55,543 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:55,544 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:47:55,544 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-02-19 17:47:55,593 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:55,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:55,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-02-19 17:47:55,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103703220] [2021-02-19 17:47:55,594 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 17:47:55,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:55,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 17:47:55,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:47:55,594 INFO L87 Difference]: Start difference. First operand 89 states and 178 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) [2021-02-19 17:47:55,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:55,893 INFO L93 Difference]: Finished difference Result 110 states and 211 transitions. [2021-02-19 17:47:55,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:47:55,894 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 [2021-02-19 17:47:55,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:55,894 INFO L225 Difference]: With dead ends: 110 [2021-02-19 17:47:55,894 INFO L226 Difference]: Without dead ends: 94 [2021-02-19 17:47:55,894 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:47:55,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-02-19 17:47:55,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 91. [2021-02-19 17:47:55,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 2.022222222222222) internal successors, (182), 90 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) [2021-02-19 17:47:55,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 182 transitions. [2021-02-19 17:47:55,895 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 182 transitions. Word has length 18 [2021-02-19 17:47:55,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:55,895 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 182 transitions. [2021-02-19 17:47:55,895 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) [2021-02-19 17:47:55,895 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 182 transitions. [2021-02-19 17:47:55,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:47:55,896 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:55,896 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:56,096 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1147 [2021-02-19 17:47:56,096 INFO L428 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:56,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:56,096 INFO L82 PathProgramCache]: Analyzing trace with hash 910752181, now seen corresponding path program 202 times [2021-02-19 17:47:56,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:56,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035542030] [2021-02-19 17:47:56,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:56,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:56,333 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:56,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035542030] [2021-02-19 17:47:56,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416137759] [2021-02-19 17:47:56,334 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 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 [2021-02-19 17:47:56,350 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:47:56,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:56,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:47:56,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:56,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:56,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:56,579 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 27 treesize of output 21 [2021-02-19 17:47:56,581 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:56,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:56,583 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 27 treesize of output 21 [2021-02-19 17:47:56,585 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:56,613 INFO L628 ElimStorePlain]: treesize reduction 34, result has 42.4 percent of original size [2021-02-19 17:47:56,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:56,616 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 10 treesize of output 6 [2021-02-19 17:47:56,617 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:47:56,626 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:56,627 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:47:56,627 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-02-19 17:47:56,675 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:56,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:56,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-02-19 17:47:56,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117451817] [2021-02-19 17:47:56,675 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 17:47:56,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:56,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 17:47:56,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:47:56,676 INFO L87 Difference]: Start difference. First operand 91 states and 182 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) [2021-02-19 17:47:57,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:57,051 INFO L93 Difference]: Finished difference Result 109 states and 210 transitions. [2021-02-19 17:47:57,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:47:57,052 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 [2021-02-19 17:47:57,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:57,052 INFO L225 Difference]: With dead ends: 109 [2021-02-19 17:47:57,052 INFO L226 Difference]: Without dead ends: 96 [2021-02-19 17:47:57,053 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:47:57,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-02-19 17:47:57,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 92. [2021-02-19 17:47:57,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.021978021978022) internal successors, (184), 91 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) [2021-02-19 17:47:57,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 184 transitions. [2021-02-19 17:47:57,054 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 184 transitions. Word has length 18 [2021-02-19 17:47:57,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:57,054 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 184 transitions. [2021-02-19 17:47:57,054 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) [2021-02-19 17:47:57,054 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 184 transitions. [2021-02-19 17:47:57,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:47:57,054 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:57,054 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:57,254 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1151,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:57,254 INFO L428 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:57,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:57,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1302234955, now seen corresponding path program 203 times [2021-02-19 17:47:57,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:57,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439219372] [2021-02-19 17:47:57,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:57,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:57,480 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:57,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439219372] [2021-02-19 17:47:57,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975708417] [2021-02-19 17:47:57,481 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 [2021-02-19 17:47:57,502 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 17:47:57,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:57,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:47:57,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:57,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:57,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:57,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:47:57,682 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:57,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:57,685 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 19 treesize of output 15 [2021-02-19 17:47:57,686 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:57,765 INFO L628 ElimStorePlain]: treesize reduction 88, result has 45.0 percent of original size [2021-02-19 17:47:57,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:57,769 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 19 treesize of output 15 [2021-02-19 17:47:57,770 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:57,799 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:57,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:57,802 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 10 treesize of output 6 [2021-02-19 17:47:57,804 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:47:57,832 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:57,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:57,836 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 10 treesize of output 6 [2021-02-19 17:47:57,837 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:47:57,863 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:57,864 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:47:57,865 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-02-19 17:47:57,964 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:57,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:57,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-02-19 17:47:57,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222864332] [2021-02-19 17:47:57,964 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 17:47:57,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:57,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 17:47:57,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:47:57,965 INFO L87 Difference]: Start difference. First operand 92 states and 184 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) [2021-02-19 17:47:58,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:58,596 INFO L93 Difference]: Finished difference Result 133 states and 250 transitions. [2021-02-19 17:47:58,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:47:58,596 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 [2021-02-19 17:47:58,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:58,597 INFO L225 Difference]: With dead ends: 133 [2021-02-19 17:47:58,597 INFO L226 Difference]: Without dead ends: 114 [2021-02-19 17:47:58,597 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2021-02-19 17:47:58,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-02-19 17:47:58,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 89. [2021-02-19 17:47:58,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 2.022727272727273) internal successors, (178), 88 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) [2021-02-19 17:47:58,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 178 transitions. [2021-02-19 17:47:58,598 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 178 transitions. Word has length 18 [2021-02-19 17:47:58,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:58,598 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 178 transitions. [2021-02-19 17:47:58,598 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) [2021-02-19 17:47:58,598 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 178 transitions. [2021-02-19 17:47:58,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:47:58,598 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:58,598 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:58,798 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1155 [2021-02-19 17:47:58,799 INFO L428 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:58,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:58,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1756233995, now seen corresponding path program 204 times [2021-02-19 17:47:58,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:58,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820706012] [2021-02-19 17:47:58,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:58,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:59,053 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:59,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820706012] [2021-02-19 17:47:59,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13740027] [2021-02-19 17:47:59,053 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 [2021-02-19 17:47:59,071 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:47:59,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:59,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:47:59,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:59,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:59,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:59,254 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 19 treesize of output 15 [2021-02-19 17:47:59,255 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:59,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:59,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:47:59,259 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:59,287 INFO L628 ElimStorePlain]: treesize reduction 34, result has 42.4 percent of original size [2021-02-19 17:47:59,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:59,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:47:59,291 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:47:59,299 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:59,300 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:47:59,300 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-02-19 17:47:59,352 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:59,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:59,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-02-19 17:47:59,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113148075] [2021-02-19 17:47:59,352 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 17:47:59,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:59,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 17:47:59,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:47:59,353 INFO L87 Difference]: Start difference. First operand 89 states and 178 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) [2021-02-19 17:47:59,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:59,671 INFO L93 Difference]: Finished difference Result 111 states and 214 transitions. [2021-02-19 17:47:59,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:47:59,672 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 [2021-02-19 17:47:59,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:59,672 INFO L225 Difference]: With dead ends: 111 [2021-02-19 17:47:59,672 INFO L226 Difference]: Without dead ends: 98 [2021-02-19 17:47:59,673 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:47:59,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-02-19 17:47:59,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 94. [2021-02-19 17:47:59,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.021505376344086) internal successors, (188), 93 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:59,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 188 transitions. [2021-02-19 17:47:59,674 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 188 transitions. Word has length 18 [2021-02-19 17:47:59,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:59,674 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 188 transitions. [2021-02-19 17:47:59,674 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) [2021-02-19 17:47:59,674 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 188 transitions. [2021-02-19 17:47:59,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:47:59,674 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:59,674 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:59,877 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1160,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:59,878 INFO L428 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:59,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:59,878 INFO L82 PathProgramCache]: Analyzing trace with hash -1364751221, now seen corresponding path program 205 times [2021-02-19 17:47:59,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:59,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922792790] [2021-02-19 17:47:59,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:59,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:00,141 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:00,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922792790] [2021-02-19 17:48:00,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884454868] [2021-02-19 17:48:00,142 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 [2021-02-19 17:48:00,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:00,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:48:00,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:48:00,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:00,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:00,310 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 19 treesize of output 15 [2021-02-19 17:48:00,311 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:00,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:00,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:48:00,316 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:00,401 INFO L628 ElimStorePlain]: treesize reduction 88, result has 46.0 percent of original size [2021-02-19 17:48:00,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:00,406 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 13 treesize of output 9 [2021-02-19 17:48:00,408 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:48:00,438 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:00,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:00,442 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 [2021-02-19 17:48:00,443 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:00,472 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:00,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:00,475 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 10 treesize of output 6 [2021-02-19 17:48:00,477 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:48:00,501 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:00,502 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:48:00,502 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-02-19 17:48:00,586 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:00,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:00,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-02-19 17:48:00,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14378812] [2021-02-19 17:48:00,586 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 17:48:00,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:00,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 17:48:00,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:48:00,587 INFO L87 Difference]: Start difference. First operand 94 states and 188 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) [2021-02-19 17:48:01,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:01,123 INFO L93 Difference]: Finished difference Result 136 states and 256 transitions. [2021-02-19 17:48:01,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:48:01,124 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 [2021-02-19 17:48:01,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:01,124 INFO L225 Difference]: With dead ends: 136 [2021-02-19 17:48:01,124 INFO L226 Difference]: Without dead ends: 117 [2021-02-19 17:48:01,125 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2021-02-19 17:48:01,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-02-19 17:48:01,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 93. [2021-02-19 17:48:01,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.0217391304347827) internal successors, (186), 92 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) [2021-02-19 17:48:01,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 186 transitions. [2021-02-19 17:48:01,126 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 186 transitions. Word has length 18 [2021-02-19 17:48:01,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:01,126 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 186 transitions. [2021-02-19 17:48:01,126 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) [2021-02-19 17:48:01,126 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 186 transitions. [2021-02-19 17:48:01,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:48:01,126 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:01,126 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:48:01,326 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1164,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:48:01,327 INFO L428 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:48:01,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:48:01,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1899981023, now seen corresponding path program 206 times [2021-02-19 17:48:01,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:48:01,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226076182] [2021-02-19 17:48:01,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:48:01,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:01,530 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:01,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226076182] [2021-02-19 17:48:01,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937509528] [2021-02-19 17:48:01,530 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 [2021-02-19 17:48:01,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:48:01,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:48:01,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:48:01,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:48:01,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:01,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:01,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:48:01,677 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:01,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:01,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:01,682 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 [2021-02-19 17:48:01,683 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:01,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:01,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:01,691 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 [2021-02-19 17:48:01,692 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:01,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:01,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:48:01,697 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:01,770 INFO L628 ElimStorePlain]: treesize reduction 77, result has 46.5 percent of original size [2021-02-19 17:48:01,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:01,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:01,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:48:01,776 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:48:01,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:01,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:48:01,782 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:48:01,811 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:01,812 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:48:01,812 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-02-19 17:48:01,911 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:01,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:01,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-02-19 17:48:01,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719951471] [2021-02-19 17:48:01,912 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 17:48:01,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:01,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 17:48:01,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:48:01,912 INFO L87 Difference]: Start difference. First operand 93 states and 186 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) [2021-02-19 17:48:02,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:02,672 INFO L93 Difference]: Finished difference Result 159 states and 299 transitions. [2021-02-19 17:48:02,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:48:02,673 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 [2021-02-19 17:48:02,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:02,673 INFO L225 Difference]: With dead ends: 159 [2021-02-19 17:48:02,673 INFO L226 Difference]: Without dead ends: 133 [2021-02-19 17:48:02,673 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=111, Invalid=701, Unknown=0, NotChecked=0, Total=812 [2021-02-19 17:48:02,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-02-19 17:48:02,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 96. [2021-02-19 17:48:02,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.0526315789473686) internal successors, (195), 95 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:48:02,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 195 transitions. [2021-02-19 17:48:02,675 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 195 transitions. Word has length 18 [2021-02-19 17:48:02,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:02,675 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 195 transitions. [2021-02-19 17:48:02,675 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) [2021-02-19 17:48:02,675 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 195 transitions. [2021-02-19 17:48:02,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:48:02,675 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:02,675 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:48:02,875 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1169 [2021-02-19 17:48:02,876 INFO L428 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:48:02,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:48:02,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1312235701, now seen corresponding path program 207 times [2021-02-19 17:48:02,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:48:02,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928593415] [2021-02-19 17:48:02,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:48:02,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:03,070 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:03,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928593415] [2021-02-19 17:48:03,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982001930] [2021-02-19 17:48:03,070 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 [2021-02-19 17:48:03,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:48:03,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:48:03,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-02-19 17:48:03,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:48:03,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:03,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:03,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:48:03,221 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:03,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:03,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:48:03,226 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:03,254 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:03,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:03,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:03,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:48:03,259 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:48:03,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:03,263 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 [2021-02-19 17:48:03,264 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:48:03,290 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:03,292 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:48:03,292 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-02-19 17:48:03,385 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:03,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:03,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-02-19 17:48:03,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49283275] [2021-02-19 17:48:03,385 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:48:03,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:03,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:48:03,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:48:03,385 INFO L87 Difference]: Start difference. First operand 96 states and 195 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) [2021-02-19 17:48:04,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:04,116 INFO L93 Difference]: Finished difference Result 127 states and 258 transitions. [2021-02-19 17:48:04,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:48:04,116 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 [2021-02-19 17:48:04,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:04,117 INFO L225 Difference]: With dead ends: 127 [2021-02-19 17:48:04,117 INFO L226 Difference]: Without dead ends: 118 [2021-02-19 17:48:04,117 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2021-02-19 17:48:04,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-02-19 17:48:04,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 98. [2021-02-19 17:48:04,118 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) [2021-02-19 17:48:04,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 201 transitions. [2021-02-19 17:48:04,118 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 201 transitions. Word has length 18 [2021-02-19 17:48:04,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:04,118 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 201 transitions. [2021-02-19 17:48:04,118 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) [2021-02-19 17:48:04,118 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 201 transitions. [2021-02-19 17:48:04,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:48:04,118 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:04,118 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:48:04,318 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1172,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:48:04,319 INFO L428 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:48:04,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:48:04,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1923453851, now seen corresponding path program 208 times [2021-02-19 17:48:04,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:48:04,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370596480] [2021-02-19 17:48:04,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:48:04,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:04,549 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:04,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370596480] [2021-02-19 17:48:04,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057353217] [2021-02-19 17:48:04,550 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 [2021-02-19 17:48:04,571 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:48:04,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:48:04,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:48:04,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:48:04,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:04,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:04,804 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 19 treesize of output 15 [2021-02-19 17:48:04,805 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:04,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:04,808 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 19 treesize of output 15 [2021-02-19 17:48:04,809 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:04,839 INFO L628 ElimStorePlain]: treesize reduction 37, result has 43.1 percent of original size [2021-02-19 17:48:04,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:04,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:48:04,843 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:48:04,852 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:04,853 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:48:04,853 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-02-19 17:48:04,908 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:04,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:04,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-02-19 17:48:04,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469958310] [2021-02-19 17:48:04,908 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 17:48:04,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:04,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 17:48:04,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:48:04,909 INFO L87 Difference]: Start difference. First operand 98 states and 201 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) [2021-02-19 17:48:05,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:05,195 INFO L93 Difference]: Finished difference Result 120 states and 235 transitions. [2021-02-19 17:48:05,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:48:05,195 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 [2021-02-19 17:48:05,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:05,196 INFO L225 Difference]: With dead ends: 120 [2021-02-19 17:48:05,196 INFO L226 Difference]: Without dead ends: 101 [2021-02-19 17:48:05,196 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:48:05,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-02-19 17:48:05,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 99. [2021-02-19 17:48:05,197 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) [2021-02-19 17:48:05,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 203 transitions. [2021-02-19 17:48:05,197 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 203 transitions. Word has length 18 [2021-02-19 17:48:05,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:05,197 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 203 transitions. [2021-02-19 17:48:05,197 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) [2021-02-19 17:48:05,197 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 203 transitions. [2021-02-19 17:48:05,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:48:05,197 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:05,198 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:48:05,398 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1175,209 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:48:05,398 INFO L428 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:48:05,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:48:05,398 INFO L82 PathProgramCache]: Analyzing trace with hash 181277617, now seen corresponding path program 209 times [2021-02-19 17:48:05,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:48:05,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393609230] [2021-02-19 17:48:05,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:48:05,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:05,568 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:05,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393609230] [2021-02-19 17:48:05,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910000831] [2021-02-19 17:48:05,568 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 [2021-02-19 17:48:05,586 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:48:05,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:48:05,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:48:05,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:48:05,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:05,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:05,844 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 27 treesize of output 21 [2021-02-19 17:48:05,845 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:05,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:05,848 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 27 treesize of output 21 [2021-02-19 17:48:05,849 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:05,878 INFO L628 ElimStorePlain]: treesize reduction 40, result has 38.5 percent of original size [2021-02-19 17:48:05,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:05,880 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 10 treesize of output 6 [2021-02-19 17:48:05,882 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:48:05,891 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:05,892 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:48:05,892 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-02-19 17:48:05,945 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:05,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:05,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-02-19 17:48:05,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863388251] [2021-02-19 17:48:05,946 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 17:48:05,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:05,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 17:48:05,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:48:05,946 INFO L87 Difference]: Start difference. First operand 99 states and 203 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) [2021-02-19 17:48:06,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:06,276 INFO L93 Difference]: Finished difference Result 118 states and 232 transitions. [2021-02-19 17:48:06,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:48:06,277 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 [2021-02-19 17:48:06,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:06,277 INFO L225 Difference]: With dead ends: 118 [2021-02-19 17:48:06,277 INFO L226 Difference]: Without dead ends: 102 [2021-02-19 17:48:06,278 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:48:06,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-02-19 17:48:06,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 100. [2021-02-19 17:48:06,278 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) [2021-02-19 17:48:06,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 205 transitions. [2021-02-19 17:48:06,279 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 205 transitions. Word has length 18 [2021-02-19 17:48:06,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:06,279 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 205 transitions. [2021-02-19 17:48:06,279 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) [2021-02-19 17:48:06,279 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 205 transitions. [2021-02-19 17:48:06,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:48:06,279 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:06,279 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:48:06,479 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1178 [2021-02-19 17:48:06,479 INFO L428 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:48:06,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:48:06,480 INFO L82 PathProgramCache]: Analyzing trace with hash -567658277, now seen corresponding path program 210 times [2021-02-19 17:48:06,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:48:06,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858898652] [2021-02-19 17:48:06,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:48:06,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:06,720 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:06,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858898652] [2021-02-19 17:48:06,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215550954] [2021-02-19 17:48:06,721 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 [2021-02-19 17:48:06,738 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:48:06,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:48:06,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:48:06,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:48:06,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:06,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:06,998 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 27 treesize of output 21 [2021-02-19 17:48:07,000 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:07,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:07,003 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 27 treesize of output 21 [2021-02-19 17:48:07,004 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:07,038 INFO L628 ElimStorePlain]: treesize reduction 34, result has 42.4 percent of original size [2021-02-19 17:48:07,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:07,041 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 10 treesize of output 6 [2021-02-19 17:48:07,043 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:48:07,053 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:07,055 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:48:07,055 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-02-19 17:48:07,113 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:07,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:07,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-02-19 17:48:07,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880761731] [2021-02-19 17:48:07,113 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 17:48:07,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:07,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 17:48:07,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:48:07,114 INFO L87 Difference]: Start difference. First operand 100 states and 205 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) [2021-02-19 17:48:07,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:07,559 INFO L93 Difference]: Finished difference Result 119 states and 238 transitions. [2021-02-19 17:48:07,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:48:07,560 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 [2021-02-19 17:48:07,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:07,560 INFO L225 Difference]: With dead ends: 119 [2021-02-19 17:48:07,560 INFO L226 Difference]: Without dead ends: 106 [2021-02-19 17:48:07,560 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:48:07,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-02-19 17:48:07,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 101. [2021-02-19 17:48:07,561 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) [2021-02-19 17:48:07,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 207 transitions. [2021-02-19 17:48:07,561 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 207 transitions. Word has length 18 [2021-02-19 17:48:07,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:07,561 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 207 transitions. [2021-02-19 17:48:07,562 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) [2021-02-19 17:48:07,562 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 207 transitions. [2021-02-19 17:48:07,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:48:07,562 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:07,562 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:48:07,770 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1182,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:48:07,770 INFO L428 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:48:07,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:48:07,770 INFO L82 PathProgramCache]: Analyzing trace with hash -176175503, now seen corresponding path program 211 times [2021-02-19 17:48:07,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:48:07,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780016695] [2021-02-19 17:48:07,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:48:07,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:08,081 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:08,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780016695] [2021-02-19 17:48:08,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294134203] [2021-02-19 17:48:08,082 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 [2021-02-19 17:48:08,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:08,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:48:08,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:48:08,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:08,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:08,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:48:08,344 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:08,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:08,348 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 [2021-02-19 17:48:08,350 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:08,426 INFO L628 ElimStorePlain]: treesize reduction 85, result has 45.9 percent of original size [2021-02-19 17:48:08,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:08,429 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 10 treesize of output 6 [2021-02-19 17:48:08,431 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:48:08,458 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:08,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:08,460 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 19 treesize of output 15 [2021-02-19 17:48:08,461 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:08,486 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:08,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:08,488 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 13 treesize of output 9 [2021-02-19 17:48:08,490 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:48:08,512 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:08,513 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:48:08,513 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-02-19 17:48:08,611 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:08,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:08,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-02-19 17:48:08,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600490515] [2021-02-19 17:48:08,611 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 17:48:08,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:08,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 17:48:08,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:48:08,611 INFO L87 Difference]: Start difference. First operand 101 states and 207 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) [2021-02-19 17:48:09,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:09,256 INFO L93 Difference]: Finished difference Result 140 states and 269 transitions. [2021-02-19 17:48:09,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:48:09,257 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 [2021-02-19 17:48:09,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:09,257 INFO L225 Difference]: With dead ends: 140 [2021-02-19 17:48:09,257 INFO L226 Difference]: Without dead ends: 121 [2021-02-19 17:48:09,257 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:48:09,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-02-19 17:48:09,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 98. [2021-02-19 17:48:09,258 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) [2021-02-19 17:48:09,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 201 transitions. [2021-02-19 17:48:09,259 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 201 transitions. Word has length 18 [2021-02-19 17:48:09,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:09,259 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 201 transitions. [2021-02-19 17:48:09,259 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) [2021-02-19 17:48:09,259 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 201 transitions. [2021-02-19 17:48:09,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:48:09,259 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:09,259 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:48:09,471 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1186,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:48:09,471 INFO L428 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:48:09,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:48:09,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1221513415, now seen corresponding path program 212 times [2021-02-19 17:48:09,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:48:09,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221281559] [2021-02-19 17:48:09,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:48:09,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:09,677 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:09,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221281559] [2021-02-19 17:48:09,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702326952] [2021-02-19 17:48:09,677 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) [2021-02-19 17:48:09,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:48:09,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:48:09,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:48:09,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:48:09,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:09,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:09,943 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 [2021-02-19 17:48:09,944 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:09,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:09,947 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 19 treesize of output 15 [2021-02-19 17:48:09,948 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:09,978 INFO L628 ElimStorePlain]: treesize reduction 34, result has 42.4 percent of original size [2021-02-19 17:48:09,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:09,981 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 10 treesize of output 6 [2021-02-19 17:48:09,982 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:48:09,991 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:09,993 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:48:09,993 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-02-19 17:48:10,042 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:10,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:10,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-02-19 17:48:10,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015225139] [2021-02-19 17:48:10,042 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 17:48:10,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:10,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 17:48:10,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:48:10,042 INFO L87 Difference]: Start difference. First operand 98 states and 201 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) [2021-02-19 17:48:10,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:10,323 INFO L93 Difference]: Finished difference Result 117 states and 230 transitions. [2021-02-19 17:48:10,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:48:10,324 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 [2021-02-19 17:48:10,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:10,324 INFO L225 Difference]: With dead ends: 117 [2021-02-19 17:48:10,324 INFO L226 Difference]: Without dead ends: 101 [2021-02-19 17:48:10,325 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:48:10,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-02-19 17:48:10,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 99. [2021-02-19 17:48:10,331 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) [2021-02-19 17:48:10,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 203 transitions. [2021-02-19 17:48:10,331 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 203 transitions. Word has length 18 [2021-02-19 17:48:10,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:10,331 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 203 transitions. [2021-02-19 17:48:10,331 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) [2021-02-19 17:48:10,331 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 203 transitions. [2021-02-19 17:48:10,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:48:10,331 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:10,332 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:48:10,532 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1191,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:48:10,532 INFO L428 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:48:10,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:48:10,532 INFO L82 PathProgramCache]: Analyzing trace with hash 472577521, now seen corresponding path program 213 times [2021-02-19 17:48:10,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:48:10,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380344148] [2021-02-19 17:48:10,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:48:10,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:10,763 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:10,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380344148] [2021-02-19 17:48:10,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139828544] [2021-02-19 17:48:10,763 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 [2021-02-19 17:48:10,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:48:10,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:48:10,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:48:10,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:48:11,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:11,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:11,044 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 27 treesize of output 21 [2021-02-19 17:48:11,045 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:11,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:11,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:48:11,050 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:11,082 INFO L628 ElimStorePlain]: treesize reduction 40, result has 43.7 percent of original size [2021-02-19 17:48:11,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:11,085 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 21 treesize of output 13 [2021-02-19 17:48:11,086 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:11,095 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:11,096 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:48:11,096 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-02-19 17:48:11,153 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:11,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:11,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-02-19 17:48:11,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954821107] [2021-02-19 17:48:11,165 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 17:48:11,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:11,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 17:48:11,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:48:11,165 INFO L87 Difference]: Start difference. First operand 99 states and 203 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) [2021-02-19 17:48:11,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:11,653 INFO L93 Difference]: Finished difference Result 118 states and 236 transitions. [2021-02-19 17:48:11,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:48:11,654 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 [2021-02-19 17:48:11,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:11,654 INFO L225 Difference]: With dead ends: 118 [2021-02-19 17:48:11,654 INFO L226 Difference]: Without dead ends: 105 [2021-02-19 17:48:11,655 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:48:11,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-02-19 17:48:11,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 100. [2021-02-19 17:48:11,656 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) [2021-02-19 17:48:11,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 205 transitions. [2021-02-19 17:48:11,656 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 205 transitions. Word has length 18 [2021-02-19 17:48:11,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:11,656 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 205 transitions. [2021-02-19 17:48:11,656 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) [2021-02-19 17:48:11,656 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 205 transitions. [2021-02-19 17:48:11,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:48:11,656 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:11,656 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:48:11,857 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1195,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:48:11,857 INFO L428 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:48:11,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:48:11,857 INFO L82 PathProgramCache]: Analyzing trace with hash 864060295, now seen corresponding path program 214 times [2021-02-19 17:48:11,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:48:11,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108534834] [2021-02-19 17:48:11,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:48:11,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:12,129 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:12,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108534834] [2021-02-19 17:48:12,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322887811] [2021-02-19 17:48:12,130 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 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 [2021-02-19 17:48:12,148 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:48:12,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:48:12,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:48:12,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:48:12,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:12,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:12,368 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 19 treesize of output 15 [2021-02-19 17:48:12,369 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:12,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:12,373 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 [2021-02-19 17:48:12,375 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:12,461 INFO L628 ElimStorePlain]: treesize reduction 85, result has 45.9 percent of original size [2021-02-19 17:48:12,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:12,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:48:12,467 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:48:12,501 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:12,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:12,504 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 19 treesize of output 15 [2021-02-19 17:48:12,505 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:12,535 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:12,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:12,539 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 13 treesize of output 9 [2021-02-19 17:48:12,541 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:48:12,568 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:12,570 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:48:12,570 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-02-19 17:48:12,673 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:12,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:12,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-02-19 17:48:12,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458544737] [2021-02-19 17:48:12,673 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 17:48:12,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:12,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 17:48:12,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:48:12,674 INFO L87 Difference]: Start difference. First operand 100 states and 205 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) [2021-02-19 17:48:13,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:13,227 INFO L93 Difference]: Finished difference Result 139 states and 267 transitions. [2021-02-19 17:48:13,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:48:13,228 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 [2021-02-19 17:48:13,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:13,228 INFO L225 Difference]: With dead ends: 139 [2021-02-19 17:48:13,228 INFO L226 Difference]: Without dead ends: 120 [2021-02-19 17:48:13,229 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2021-02-19 17:48:13,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-02-19 17:48:13,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 95. [2021-02-19 17:48:13,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.074468085106383) internal successors, (195), 94 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:48:13,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 195 transitions. [2021-02-19 17:48:13,230 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 195 transitions. Word has length 18 [2021-02-19 17:48:13,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:13,230 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 195 transitions. [2021-02-19 17:48:13,230 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) [2021-02-19 17:48:13,230 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 195 transitions. [2021-02-19 17:48:13,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:48:13,230 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:13,230 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:48:13,430 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 215 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1199 [2021-02-19 17:48:13,430 INFO L428 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:48:13,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:48:13,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1951693305, now seen corresponding path program 215 times [2021-02-19 17:48:13,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:48:13,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967746487] [2021-02-19 17:48:13,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:48:13,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:13,667 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:13,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967746487] [2021-02-19 17:48:13,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965810212] [2021-02-19 17:48:13,667 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 [2021-02-19 17:48:13,685 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 17:48:13,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:48:13,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:48:13,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:48:13,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:13,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:13,926 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 27 treesize of output 21 [2021-02-19 17:48:13,927 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:13,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:13,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:48:13,932 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:13,965 INFO L628 ElimStorePlain]: treesize reduction 34, result has 42.4 percent of original size [2021-02-19 17:48:13,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:13,968 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 10 treesize of output 6 [2021-02-19 17:48:13,970 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:48:13,979 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:13,980 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:48:13,980 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-02-19 17:48:14,036 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:14,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:14,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-02-19 17:48:14,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869563799] [2021-02-19 17:48:14,037 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 17:48:14,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:14,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 17:48:14,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:48:14,037 INFO L87 Difference]: Start difference. First operand 95 states and 195 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) [2021-02-19 17:48:14,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:14,296 INFO L93 Difference]: Finished difference Result 117 states and 230 transitions. [2021-02-19 17:48:14,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:48:14,296 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 [2021-02-19 17:48:14,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:14,296 INFO L225 Difference]: With dead ends: 117 [2021-02-19 17:48:14,296 INFO L226 Difference]: Without dead ends: 101 [2021-02-19 17:48:14,297 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:48:14,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-02-19 17:48:14,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 97. [2021-02-19 17:48:14,297 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) [2021-02-19 17:48:14,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 199 transitions. [2021-02-19 17:48:14,298 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 199 transitions. Word has length 18 [2021-02-19 17:48:14,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:14,298 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 199 transitions. [2021-02-19 17:48:14,298 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) [2021-02-19 17:48:14,298 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 199 transitions. [2021-02-19 17:48:14,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:48:14,298 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:14,298 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:48:14,498 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1204 [2021-02-19 17:48:14,498 INFO L428 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:48:14,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:48:14,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1594338097, now seen corresponding path program 216 times [2021-02-19 17:48:14,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:48:14,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139482768] [2021-02-19 17:48:14,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:48:14,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:14,769 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:14,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139482768] [2021-02-19 17:48:14,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330630722] [2021-02-19 17:48:14,769 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 [2021-02-19 17:48:14,787 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:48:14,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:48:14,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-02-19 17:48:14,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:48:14,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:14,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:14,992 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 19 treesize of output 15 [2021-02-19 17:48:14,994 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:14,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:14,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:48:14,998 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:15,024 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:15,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:15,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:15,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:48:15,030 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:48:15,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:15,033 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 [2021-02-19 17:48:15,035 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:48:15,058 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:15,060 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:48:15,060 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:67, output treesize:29 [2021-02-19 17:48:15,136 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:15,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:15,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-02-19 17:48:15,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161134584] [2021-02-19 17:48:15,136 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 17:48:15,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:15,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 17:48:15,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:48:15,137 INFO L87 Difference]: Start difference. First operand 97 states and 199 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) [2021-02-19 17:48:15,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:15,716 INFO L93 Difference]: Finished difference Result 119 states and 238 transitions. [2021-02-19 17:48:15,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:48:15,717 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 [2021-02-19 17:48:15,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:15,717 INFO L225 Difference]: With dead ends: 119 [2021-02-19 17:48:15,718 INFO L226 Difference]: Without dead ends: 106 [2021-02-19 17:48:15,718 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2021-02-19 17:48:15,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-02-19 17:48:15,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 98. [2021-02-19 17:48:15,719 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) [2021-02-19 17:48:15,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 201 transitions. [2021-02-19 17:48:15,719 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 201 transitions. Word has length 18 [2021-02-19 17:48:15,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:15,719 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 201 transitions. [2021-02-19 17:48:15,719 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) [2021-02-19 17:48:15,719 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 201 transitions. [2021-02-19 17:48:15,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:48:15,719 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:15,719 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:48:15,920 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1208 [2021-02-19 17:48:15,920 INFO L428 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:48:15,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:48:15,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1985820871, now seen corresponding path program 217 times [2021-02-19 17:48:15,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:48:15,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730589860] [2021-02-19 17:48:15,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:48:15,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:16,232 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:16,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730589860] [2021-02-19 17:48:16,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919236545] [2021-02-19 17:48:16,232 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 [2021-02-19 17:48:16,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:16,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:48:16,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:48:16,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:16,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:16,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:48:16,478 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:16,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:16,482 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 [2021-02-19 17:48:16,484 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:16,578 INFO L628 ElimStorePlain]: treesize reduction 85, result has 45.9 percent of original size [2021-02-19 17:48:16,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:16,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:48:16,584 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:48:16,618 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:16,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:16,622 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 [2021-02-19 17:48:16,623 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:16,654 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:16,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:16,658 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 10 treesize of output 6 [2021-02-19 17:48:16,660 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:48:16,688 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:16,689 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:48:16,689 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-02-19 17:48:16,779 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:16,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:16,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-02-19 17:48:16,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846349150] [2021-02-19 17:48:16,780 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 17:48:16,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:16,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 17:48:16,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:48:16,780 INFO L87 Difference]: Start difference. First operand 98 states and 201 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) [2021-02-19 17:48:17,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:17,401 INFO L93 Difference]: Finished difference Result 141 states and 271 transitions. [2021-02-19 17:48:17,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:48:17,401 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 [2021-02-19 17:48:17,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:17,402 INFO L225 Difference]: With dead ends: 141 [2021-02-19 17:48:17,402 INFO L226 Difference]: Without dead ends: 122 [2021-02-19 17:48:17,402 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:48:17,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-02-19 17:48:17,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 96. [2021-02-19 17:48:17,403 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) [2021-02-19 17:48:17,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 197 transitions. [2021-02-19 17:48:17,403 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 197 transitions. Word has length 18 [2021-02-19 17:48:17,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:17,403 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 197 transitions. [2021-02-19 17:48:17,403 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) [2021-02-19 17:48:17,403 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 197 transitions. [2021-02-19 17:48:17,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:48:17,404 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:17,404 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:48:17,604 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1214,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:48:17,604 INFO L428 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:48:17,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:48:17,604 INFO L82 PathProgramCache]: Analyzing trace with hash -2112883877, now seen corresponding path program 218 times [2021-02-19 17:48:17,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:48:17,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550447211] [2021-02-19 17:48:17,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:48:17,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:17,830 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:17,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550447211] [2021-02-19 17:48:17,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506602236] [2021-02-19 17:48:17,830 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 [2021-02-19 17:48:17,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:48:17,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:48:17,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-02-19 17:48:17,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:48:18,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:18,065 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 27 treesize of output 21 [2021-02-19 17:48:18,066 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:18,072 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:18,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:18,074 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 10 treesize of output 6 [2021-02-19 17:48:18,075 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:48:18,082 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:18,083 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:48:18,083 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-02-19 17:48:18,102 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:18,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:18,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-02-19 17:48:18,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964042782] [2021-02-19 17:48:18,102 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:48:18,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:18,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:48:18,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:48:18,102 INFO L87 Difference]: Start difference. First operand 96 states and 197 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) [2021-02-19 17:48:18,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:18,442 INFO L93 Difference]: Finished difference Result 116 states and 232 transitions. [2021-02-19 17:48:18,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:48:18,443 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 [2021-02-19 17:48:18,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:18,443 INFO L225 Difference]: With dead ends: 116 [2021-02-19 17:48:18,443 INFO L226 Difference]: Without dead ends: 109 [2021-02-19 17:48:18,443 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:48:18,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-02-19 17:48:18,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 98. [2021-02-19 17:48:18,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.082474226804124) internal successors, (202), 97 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) [2021-02-19 17:48:18,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 202 transitions. [2021-02-19 17:48:18,444 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 202 transitions. Word has length 18 [2021-02-19 17:48:18,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:18,445 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 202 transitions. [2021-02-19 17:48:18,445 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) [2021-02-19 17:48:18,445 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 202 transitions. [2021-02-19 17:48:18,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:48:18,445 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:18,445 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:48:18,645 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1219 [2021-02-19 17:48:18,645 INFO L428 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:48:18,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:48:18,646 INFO L82 PathProgramCache]: Analyzing trace with hash -1721401103, now seen corresponding path program 219 times [2021-02-19 17:48:18,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:48:18,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530421297] [2021-02-19 17:48:18,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:48:18,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:18,931 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:18,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530421297] [2021-02-19 17:48:18,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147921360] [2021-02-19 17:48:18,931 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 [2021-02-19 17:48:18,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:48:18,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:48:18,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-02-19 17:48:18,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:48:19,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:19,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:19,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:48:19,095 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:19,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:19,098 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 19 treesize of output 15 [2021-02-19 17:48:19,099 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:19,129 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:19,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:19,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:19,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:48:19,136 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:48:19,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:19,139 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 [2021-02-19 17:48:19,141 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:48:19,169 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:19,171 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:48:19,171 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-02-19 17:48:19,294 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:19,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:19,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-02-19 17:48:19,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736983283] [2021-02-19 17:48:19,295 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 17:48:19,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:19,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 17:48:19,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:48:19,295 INFO L87 Difference]: Start difference. First operand 98 states and 202 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) [2021-02-19 17:48:19,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:19,796 INFO L93 Difference]: Finished difference Result 123 states and 248 transitions. [2021-02-19 17:48:19,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:48:19,796 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 [2021-02-19 17:48:19,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:19,797 INFO L225 Difference]: With dead ends: 123 [2021-02-19 17:48:19,797 INFO L226 Difference]: Without dead ends: 116 [2021-02-19 17:48:19,797 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2021-02-19 17:48:19,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-02-19 17:48:19,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 99. [2021-02-19 17:48:19,798 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) [2021-02-19 17:48:19,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 206 transitions. [2021-02-19 17:48:19,798 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 206 transitions. Word has length 18 [2021-02-19 17:48:19,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:19,798 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 206 transitions. [2021-02-19 17:48:19,798 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) [2021-02-19 17:48:19,798 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 206 transitions. [2021-02-19 17:48:19,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:48:19,799 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:19,799 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:48:19,999 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1222 [2021-02-19 17:48:19,999 INFO L428 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:48:19,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:48:20,000 INFO L82 PathProgramCache]: Analyzing trace with hash 2038336391, now seen corresponding path program 220 times [2021-02-19 17:48:20,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:48:20,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576731216] [2021-02-19 17:48:20,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:48:20,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:20,239 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:20,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576731216] [2021-02-19 17:48:20,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186760175] [2021-02-19 17:48:20,239 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 [2021-02-19 17:48:20,257 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:48:20,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:48:20,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:48:20,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:48:20,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:20,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:20,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:48:20,406 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:20,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:20,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:20,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:48:20,412 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:20,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:20,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:20,416 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 19 treesize of output 15 [2021-02-19 17:48:20,418 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:20,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:20,421 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 [2021-02-19 17:48:20,422 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:20,504 INFO L628 ElimStorePlain]: treesize reduction 77, result has 47.6 percent of original size [2021-02-19 17:48:20,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:20,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:20,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:48:20,511 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:48:20,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:20,515 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 13 treesize of output 9 [2021-02-19 17:48:20,518 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:48:20,550 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:20,551 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:48:20,551 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-02-19 17:48:20,657 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:20,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:20,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-02-19 17:48:20,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349277038] [2021-02-19 17:48:20,658 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 17:48:20,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:20,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 17:48:20,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:48:20,658 INFO L87 Difference]: Start difference. First operand 99 states and 206 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) [2021-02-19 17:48:21,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:21,171 INFO L93 Difference]: Finished difference Result 150 states and 297 transitions. [2021-02-19 17:48:21,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:48:21,171 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 [2021-02-19 17:48:21,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:21,172 INFO L225 Difference]: With dead ends: 150 [2021-02-19 17:48:21,172 INFO L226 Difference]: Without dead ends: 131 [2021-02-19 17:48:21,172 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:48:21,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-02-19 17:48:21,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 101. [2021-02-19 17:48:21,173 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) [2021-02-19 17:48:21,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 211 transitions. [2021-02-19 17:48:21,173 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 211 transitions. Word has length 18 [2021-02-19 17:48:21,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:21,173 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 211 transitions. [2021-02-19 17:48:21,173 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) [2021-02-19 17:48:21,173 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 211 transitions. [2021-02-19 17:48:21,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:48:21,173 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:21,173 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:48:21,388 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1227,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:48:21,388 INFO L428 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:48:21,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:48:21,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1109890587, now seen corresponding path program 221 times [2021-02-19 17:48:21,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:48:21,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313013644] [2021-02-19 17:48:21,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:48:21,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:21,609 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:21,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313013644] [2021-02-19 17:48:21,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773530655] [2021-02-19 17:48:21,609 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 [2021-02-19 17:48:21,630 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 17:48:21,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:48:21,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:48:21,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:48:21,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:21,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:21,848 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 27 treesize of output 21 [2021-02-19 17:48:21,849 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:21,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:21,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:48:21,852 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:21,877 INFO L628 ElimStorePlain]: treesize reduction 46, result has 35.2 percent of original size [2021-02-19 17:48:21,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:21,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:48:21,881 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:48:21,888 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:21,889 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:48:21,889 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-02-19 17:48:21,932 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:21,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:21,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-02-19 17:48:21,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90114929] [2021-02-19 17:48:21,932 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 17:48:21,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:21,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 17:48:21,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:48:21,933 INFO L87 Difference]: Start difference. First operand 101 states and 211 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) [2021-02-19 17:48:22,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:22,228 INFO L93 Difference]: Finished difference Result 124 states and 252 transitions. [2021-02-19 17:48:22,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:48:22,229 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 [2021-02-19 17:48:22,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:22,229 INFO L225 Difference]: With dead ends: 124 [2021-02-19 17:48:22,229 INFO L226 Difference]: Without dead ends: 111 [2021-02-19 17:48:22,230 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:48:22,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-02-19 17:48:22,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 105. [2021-02-19 17:48:22,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.105769230769231) internal successors, (219), 104 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) [2021-02-19 17:48:22,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 219 transitions. [2021-02-19 17:48:22,231 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 219 transitions. Word has length 18 [2021-02-19 17:48:22,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:22,231 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 219 transitions. [2021-02-19 17:48:22,231 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) [2021-02-19 17:48:22,231 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 219 transitions. [2021-02-19 17:48:22,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:48:22,231 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:22,231 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:48:22,431 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1230,222 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:48:22,432 INFO L428 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:48:22,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:48:22,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1501373361, now seen corresponding path program 222 times [2021-02-19 17:48:22,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:48:22,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382139773] [2021-02-19 17:48:22,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:48:22,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:22,719 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:22,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382139773] [2021-02-19 17:48:22,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913399258] [2021-02-19 17:48:22,719 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 [2021-02-19 17:48:22,737 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:48:22,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:48:22,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-02-19 17:48:22,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:48:22,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:22,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:22,886 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 [2021-02-19 17:48:22,888 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:22,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:22,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:48:22,892 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:22,923 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:22,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:22,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:22,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:48:22,929 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:48:22,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:22,933 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 [2021-02-19 17:48:22,935 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:48:22,963 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:22,965 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:48:22,965 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-02-19 17:48:23,093 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:23,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:23,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-02-19 17:48:23,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578254353] [2021-02-19 17:48:23,093 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 17:48:23,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:23,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 17:48:23,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:48:23,094 INFO L87 Difference]: Start difference. First operand 105 states and 219 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) [2021-02-19 17:48:23,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:23,474 INFO L93 Difference]: Finished difference Result 122 states and 251 transitions. [2021-02-19 17:48:23,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:48:23,474 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 [2021-02-19 17:48:23,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:23,474 INFO L225 Difference]: With dead ends: 122 [2021-02-19 17:48:23,474 INFO L226 Difference]: Without dead ends: 115 [2021-02-19 17:48:23,475 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:48:23,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-02-19 17:48:23,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 105. [2021-02-19 17:48:23,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.105769230769231) internal successors, (219), 104 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) [2021-02-19 17:48:23,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 219 transitions. [2021-02-19 17:48:23,476 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 219 transitions. Word has length 18 [2021-02-19 17:48:23,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:23,476 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 219 transitions. [2021-02-19 17:48:23,476 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) [2021-02-19 17:48:23,476 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 219 transitions. [2021-02-19 17:48:23,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:48:23,476 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:23,476 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:48:23,676 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1233,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:48:23,677 INFO L428 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:48:23,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:48:23,677 INFO L82 PathProgramCache]: Analyzing trace with hash 966143559, now seen corresponding path program 223 times [2021-02-19 17:48:23,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:48:23,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839317761] [2021-02-19 17:48:23,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:48:23,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:23,897 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:23,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839317761] [2021-02-19 17:48:23,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513424834] [2021-02-19 17:48:23,898 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 [2021-02-19 17:48:23,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:23,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:48:23,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:48:24,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:24,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:24,077 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 [2021-02-19 17:48:24,078 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:24,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:24,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:24,083 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 19 treesize of output 15 [2021-02-19 17:48:24,084 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:24,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:24,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:24,088 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 19 treesize of output 15 [2021-02-19 17:48:24,089 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:24,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:24,093 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 19 treesize of output 15 [2021-02-19 17:48:24,094 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:24,178 INFO L628 ElimStorePlain]: treesize reduction 77, result has 47.6 percent of original size [2021-02-19 17:48:24,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:24,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:24,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:48:24,185 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:48:24,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:24,189 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 [2021-02-19 17:48:24,191 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:48:24,223 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:24,228 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:48:24,228 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-02-19 17:48:24,332 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:24,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:24,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-02-19 17:48:24,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119137048] [2021-02-19 17:48:24,332 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 17:48:24,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:24,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 17:48:24,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:48:24,333 INFO L87 Difference]: Start difference. First operand 105 states and 219 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) [2021-02-19 17:48:24,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:24,771 INFO L93 Difference]: Finished difference Result 132 states and 271 transitions. [2021-02-19 17:48:24,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:48:24,771 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 [2021-02-19 17:48:24,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:24,772 INFO L225 Difference]: With dead ends: 132 [2021-02-19 17:48:24,772 INFO L226 Difference]: Without dead ends: 120 [2021-02-19 17:48:24,772 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:48:24,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-02-19 17:48:24,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 105. [2021-02-19 17:48:24,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.105769230769231) internal successors, (219), 104 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) [2021-02-19 17:48:24,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 219 transitions. [2021-02-19 17:48:24,773 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 219 transitions. Word has length 18 [2021-02-19 17:48:24,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:24,773 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 219 transitions. [2021-02-19 17:48:24,773 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) [2021-02-19 17:48:24,773 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 219 transitions. [2021-02-19 17:48:24,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:48:24,773 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:24,773 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:48:24,974 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1238 [2021-02-19 17:48:24,974 INFO L428 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:48:24,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:48:24,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1553888881, now seen corresponding path program 224 times [2021-02-19 17:48:24,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:48:24,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977638885] [2021-02-19 17:48:24,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:48:24,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:25,265 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:25,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977638885] [2021-02-19 17:48:25,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951471949] [2021-02-19 17:48:25,265 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 [2021-02-19 17:48:25,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:48:25,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:48:25,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-02-19 17:48:25,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:48:25,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:25,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:25,438 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 19 treesize of output 15 [2021-02-19 17:48:25,440 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:25,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:25,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:48:25,445 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:25,481 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:25,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:25,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:25,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:48:25,486 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:48:25,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:25,491 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 13 treesize of output 9 [2021-02-19 17:48:25,493 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:48:25,534 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:25,536 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:48:25,536 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-02-19 17:48:25,655 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:25,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:25,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-02-19 17:48:25,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266923305] [2021-02-19 17:48:25,656 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 17:48:25,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:25,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 17:48:25,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:48:25,656 INFO L87 Difference]: Start difference. First operand 105 states and 219 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) [2021-02-19 17:48:26,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:26,961 INFO L93 Difference]: Finished difference Result 196 states and 380 transitions. [2021-02-19 17:48:26,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:48:26,961 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 [2021-02-19 17:48:26,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:26,962 INFO L225 Difference]: With dead ends: 196 [2021-02-19 17:48:26,962 INFO L226 Difference]: Without dead ends: 166 [2021-02-19 17:48:26,962 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=140, Invalid=982, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 17:48:26,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-02-19 17:48:26,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 109. [2021-02-19 17:48:26,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.1481481481481484) internal successors, (232), 108 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) [2021-02-19 17:48:26,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 232 transitions. [2021-02-19 17:48:26,963 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 232 transitions. Word has length 18 [2021-02-19 17:48:26,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:26,964 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 232 transitions. [2021-02-19 17:48:26,964 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) [2021-02-19 17:48:26,964 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 232 transitions. [2021-02-19 17:48:26,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:48:26,964 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:26,964 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:48:27,164 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1241,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:48:27,164 INFO L428 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:48:27,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:48:27,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1700842617, now seen corresponding path program 225 times [2021-02-19 17:48:27,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:48:27,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507813173] [2021-02-19 17:48:27,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:48:27,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:27,465 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:27,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507813173] [2021-02-19 17:48:27,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271412741] [2021-02-19 17:48:27,466 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 [2021-02-19 17:48:27,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:48:27,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:48:27,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-02-19 17:48:27,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:48:27,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:27,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:27,649 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 [2021-02-19 17:48:27,650 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:27,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:27,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:48:27,653 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:27,678 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:27,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:27,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:27,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:48:27,683 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:48:27,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:27,685 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 13 treesize of output 9 [2021-02-19 17:48:27,687 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:48:27,709 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:27,710 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:48:27,710 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-02-19 17:48:27,833 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:27,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:27,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-02-19 17:48:27,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775848041] [2021-02-19 17:48:27,833 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 17:48:27,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:27,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 17:48:27,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:48:27,834 INFO L87 Difference]: Start difference. First operand 109 states and 232 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) [2021-02-19 17:48:28,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:28,392 INFO L93 Difference]: Finished difference Result 142 states and 291 transitions. [2021-02-19 17:48:28,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:48:28,393 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 [2021-02-19 17:48:28,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:28,394 INFO L225 Difference]: With dead ends: 142 [2021-02-19 17:48:28,394 INFO L226 Difference]: Without dead ends: 128 [2021-02-19 17:48:28,394 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:48:28,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-02-19 17:48:28,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 114. [2021-02-19 17:48:28,395 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) [2021-02-19 17:48:28,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 244 transitions. [2021-02-19 17:48:28,395 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 244 transitions. Word has length 18 [2021-02-19 17:48:28,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:28,395 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 244 transitions. [2021-02-19 17:48:28,395 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) [2021-02-19 17:48:28,395 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 244 transitions. [2021-02-19 17:48:28,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:48:28,396 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:28,396 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:48:28,596 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1244 [2021-02-19 17:48:28,596 INFO L428 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:48:28,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:48:28,596 INFO L82 PathProgramCache]: Analyzing trace with hash -1853922797, now seen corresponding path program 226 times [2021-02-19 17:48:28,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:48:28,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138087161] [2021-02-19 17:48:28,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:48:28,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:28,864 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:28,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138087161] [2021-02-19 17:48:28,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634111556] [2021-02-19 17:48:28,865 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 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 [2021-02-19 17:48:28,882 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:48:28,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:48:28,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:48:28,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:48:29,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:29,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:29,099 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 27 treesize of output 21 [2021-02-19 17:48:29,100 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:29,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:29,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:48:29,106 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:29,139 INFO L628 ElimStorePlain]: treesize reduction 36, result has 42.9 percent of original size [2021-02-19 17:48:29,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:29,142 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 10 treesize of output 6 [2021-02-19 17:48:29,144 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:48:29,154 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:29,155 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:48:29,155 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-02-19 17:48:29,217 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:29,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:29,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-02-19 17:48:29,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040960842] [2021-02-19 17:48:29,218 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 17:48:29,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:29,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 17:48:29,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:48:29,218 INFO L87 Difference]: Start difference. First operand 114 states and 244 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) [2021-02-19 17:48:29,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:29,479 INFO L93 Difference]: Finished difference Result 134 states and 275 transitions. [2021-02-19 17:48:29,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:48:29,479 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 [2021-02-19 17:48:29,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:29,480 INFO L225 Difference]: With dead ends: 134 [2021-02-19 17:48:29,480 INFO L226 Difference]: Without dead ends: 115 [2021-02-19 17:48:29,480 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:48:29,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-02-19 17:48:29,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2021-02-19 17:48:29,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.1578947368421053) internal successors, (246), 114 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) [2021-02-19 17:48:29,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 246 transitions. [2021-02-19 17:48:29,481 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 246 transitions. Word has length 18 [2021-02-19 17:48:29,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:29,481 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 246 transitions. [2021-02-19 17:48:29,481 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) [2021-02-19 17:48:29,481 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 246 transitions. [2021-02-19 17:48:29,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:48:29,481 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:29,482 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:48:29,682 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1249,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:48:29,682 INFO L428 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:48:29,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:48:29,682 INFO L82 PathProgramCache]: Analyzing trace with hash 698868265, now seen corresponding path program 227 times [2021-02-19 17:48:29,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:48:29,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986812890] [2021-02-19 17:48:29,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:48:29,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:29,913 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:29,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986812890] [2021-02-19 17:48:29,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950098843] [2021-02-19 17:48:29,914 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 [2021-02-19 17:48:29,932 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:48:29,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:48:29,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:48:29,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:48:30,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:30,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:30,156 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 27 treesize of output 21 [2021-02-19 17:48:30,157 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:30,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:30,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:48:30,161 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:30,186 INFO L628 ElimStorePlain]: treesize reduction 42, result has 39.1 percent of original size [2021-02-19 17:48:30,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:30,188 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 10 treesize of output 6 [2021-02-19 17:48:30,189 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:48:30,197 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:30,198 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:48:30,198 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-02-19 17:48:30,239 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:30,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:30,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-02-19 17:48:30,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337828364] [2021-02-19 17:48:30,240 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 17:48:30,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:30,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 17:48:30,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:48:30,240 INFO L87 Difference]: Start difference. First operand 115 states and 246 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) [2021-02-19 17:48:30,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:30,548 INFO L93 Difference]: Finished difference Result 132 states and 272 transitions. [2021-02-19 17:48:30,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:48:30,548 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 [2021-02-19 17:48:30,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:30,549 INFO L225 Difference]: With dead ends: 132 [2021-02-19 17:48:30,549 INFO L226 Difference]: Without dead ends: 116 [2021-02-19 17:48:30,549 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:48:30,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-02-19 17:48:30,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2021-02-19 17:48:30,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.1565217391304348) internal successors, (248), 115 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) [2021-02-19 17:48:30,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 248 transitions. [2021-02-19 17:48:30,550 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 248 transitions. Word has length 18 [2021-02-19 17:48:30,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:30,550 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 248 transitions. [2021-02-19 17:48:30,551 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) [2021-02-19 17:48:30,551 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 248 transitions. [2021-02-19 17:48:30,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:48:30,551 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:30,551 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:48:30,751 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1250,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:48:30,751 INFO L428 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:48:30,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:48:30,752 INFO L82 PathProgramCache]: Analyzing trace with hash -50067629, now seen corresponding path program 228 times [2021-02-19 17:48:30,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:48:30,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623614701] [2021-02-19 17:48:30,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:48:30,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:31,072 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:31,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623614701] [2021-02-19 17:48:31,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115290154] [2021-02-19 17:48:31,073 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 [2021-02-19 17:48:31,091 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:48:31,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:48:31,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:48:31,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:48:31,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:31,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:31,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:48:31,345 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:31,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:31,349 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 27 treesize of output 21 [2021-02-19 17:48:31,351 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:31,386 INFO L628 ElimStorePlain]: treesize reduction 42, result has 39.1 percent of original size [2021-02-19 17:48:31,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:31,389 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 10 treesize of output 6 [2021-02-19 17:48:31,391 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:48:31,402 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:31,403 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:48:31,403 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-02-19 17:48:31,466 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:31,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:31,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-02-19 17:48:31,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747132370] [2021-02-19 17:48:31,466 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 17:48:31,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:31,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 17:48:31,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:48:31,467 INFO L87 Difference]: Start difference. First operand 116 states and 248 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) [2021-02-19 17:48:31,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:31,952 INFO L93 Difference]: Finished difference Result 134 states and 280 transitions. [2021-02-19 17:48:31,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:48:31,953 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 [2021-02-19 17:48:31,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:31,953 INFO L225 Difference]: With dead ends: 134 [2021-02-19 17:48:31,953 INFO L226 Difference]: Without dead ends: 121 [2021-02-19 17:48:31,954 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:48:31,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-02-19 17:48:31,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 117. [2021-02-19 17:48:31,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.1551724137931036) internal successors, (250), 116 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:48:31,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 250 transitions. [2021-02-19 17:48:31,955 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 250 transitions. Word has length 18 [2021-02-19 17:48:31,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:31,955 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 250 transitions. [2021-02-19 17:48:31,955 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) [2021-02-19 17:48:31,955 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 250 transitions. [2021-02-19 17:48:31,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:48:31,955 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:31,955 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:48:32,156 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1251,229 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:48:32,156 INFO L428 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:48:32,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:48:32,156 INFO L82 PathProgramCache]: Analyzing trace with hash 341415145, now seen corresponding path program 229 times [2021-02-19 17:48:32,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:48:32,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734375944] [2021-02-19 17:48:32,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:48:32,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:32,502 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:32,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734375944] [2021-02-19 17:48:32,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318989794] [2021-02-19 17:48:32,502 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 [2021-02-19 17:48:32,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:32,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:48:32,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:48:32,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:32,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:32,735 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 [2021-02-19 17:48:32,736 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:32,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:32,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:32,741 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 [2021-02-19 17:48:32,742 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:32,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:32,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:32,747 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 19 treesize of output 15 [2021-02-19 17:48:32,748 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:32,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:32,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:48:32,754 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:32,836 INFO L628 ElimStorePlain]: treesize reduction 83, result has 43.5 percent of original size [2021-02-19 17:48:32,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:32,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:32,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:48:32,841 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:48:32,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:32,845 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 10 treesize of output 6 [2021-02-19 17:48:32,846 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:48:32,871 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:32,873 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:48:32,873 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-02-19 17:48:32,965 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:32,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:32,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-02-19 17:48:32,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599053236] [2021-02-19 17:48:32,965 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 17:48:32,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:32,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 17:48:32,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:48:32,966 INFO L87 Difference]: Start difference. First operand 117 states and 250 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) [2021-02-19 17:48:33,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:33,564 INFO L93 Difference]: Finished difference Result 155 states and 311 transitions. [2021-02-19 17:48:33,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:48:33,565 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 [2021-02-19 17:48:33,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:33,565 INFO L225 Difference]: With dead ends: 155 [2021-02-19 17:48:33,565 INFO L226 Difference]: Without dead ends: 136 [2021-02-19 17:48:33,565 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:48:33,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-02-19 17:48:33,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 114. [2021-02-19 17:48:33,567 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) [2021-02-19 17:48:33,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 244 transitions. [2021-02-19 17:48:33,567 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 244 transitions. Word has length 18 [2021-02-19 17:48:33,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:33,567 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 244 transitions. [2021-02-19 17:48:33,567 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) [2021-02-19 17:48:33,567 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 244 transitions. [2021-02-19 17:48:33,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:48:33,567 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:33,567 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:48:33,767 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1252,230 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:48:33,768 INFO L428 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:48:33,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:48:33,768 INFO L82 PathProgramCache]: Analyzing trace with hash 1739104063, now seen corresponding path program 230 times [2021-02-19 17:48:33,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:48:33,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793838610] [2021-02-19 17:48:33,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:48:33,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:33,975 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:33,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793838610] [2021-02-19 17:48:33,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923951023] [2021-02-19 17:48:33,975 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 [2021-02-19 17:48:33,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:48:33,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:48:33,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:48:33,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:48:34,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:34,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:34,207 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 27 treesize of output 21 [2021-02-19 17:48:34,208 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:34,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:34,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:48:34,214 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:34,247 INFO L628 ElimStorePlain]: treesize reduction 42, result has 39.1 percent of original size [2021-02-19 17:48:34,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:34,250 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 [2021-02-19 17:48:34,252 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:48:34,262 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:34,264 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:48:34,264 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-02-19 17:48:34,324 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:34,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:34,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-02-19 17:48:34,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604163423] [2021-02-19 17:48:34,325 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 17:48:34,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:34,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 17:48:34,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:48:34,325 INFO L87 Difference]: Start difference. First operand 114 states and 244 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) [2021-02-19 17:48:34,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:34,685 INFO L93 Difference]: Finished difference Result 132 states and 272 transitions. [2021-02-19 17:48:34,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:48:34,686 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 [2021-02-19 17:48:34,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:34,686 INFO L225 Difference]: With dead ends: 132 [2021-02-19 17:48:34,686 INFO L226 Difference]: Without dead ends: 116 [2021-02-19 17:48:34,686 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:48:34,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-02-19 17:48:34,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2021-02-19 17:48:34,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.1565217391304348) internal successors, (248), 115 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) [2021-02-19 17:48:34,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 248 transitions. [2021-02-19 17:48:34,687 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 248 transitions. Word has length 18 [2021-02-19 17:48:34,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:34,687 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 248 transitions. [2021-02-19 17:48:34,687 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) [2021-02-19 17:48:34,687 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 248 transitions. [2021-02-19 17:48:34,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:48:34,688 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:34,688 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:48:34,888 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1255 [2021-02-19 17:48:34,888 INFO L428 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:48:34,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:48:34,888 INFO L82 PathProgramCache]: Analyzing trace with hash 990168169, now seen corresponding path program 231 times [2021-02-19 17:48:34,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:48:34,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057455239] [2021-02-19 17:48:34,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:48:34,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:35,132 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:35,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057455239] [2021-02-19 17:48:35,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743568027] [2021-02-19 17:48:35,132 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 [2021-02-19 17:48:35,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:48:35,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:48:35,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-02-19 17:48:35,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:48:35,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:35,373 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 27 treesize of output 21 [2021-02-19 17:48:35,375 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:35,384 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:35,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:35,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:48:35,390 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:48:35,399 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:35,401 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:48:35,401 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:13 [2021-02-19 17:48:35,464 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:35,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:35,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-02-19 17:48:35,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789224015] [2021-02-19 17:48:35,465 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 17:48:35,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:35,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 17:48:35,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:48:35,465 INFO L87 Difference]: Start difference. First operand 116 states and 248 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) [2021-02-19 17:48:36,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:36,112 INFO L93 Difference]: Finished difference Result 133 states and 281 transitions. [2021-02-19 17:48:36,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:48:36,113 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 [2021-02-19 17:48:36,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:36,113 INFO L225 Difference]: With dead ends: 133 [2021-02-19 17:48:36,113 INFO L226 Difference]: Without dead ends: 126 [2021-02-19 17:48:36,113 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:48:36,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-02-19 17:48:36,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 117. [2021-02-19 17:48:36,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.163793103448276) internal successors, (251), 116 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) [2021-02-19 17:48:36,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 251 transitions. [2021-02-19 17:48:36,115 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 251 transitions. Word has length 18 [2021-02-19 17:48:36,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:36,115 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 251 transitions. [2021-02-19 17:48:36,115 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) [2021-02-19 17:48:36,115 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 251 transitions. [2021-02-19 17:48:36,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:48:36,115 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:36,115 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:48:36,319 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1256 [2021-02-19 17:48:36,320 INFO L428 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:48:36,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:48:36,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1381650943, now seen corresponding path program 232 times [2021-02-19 17:48:36,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:48:36,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411636478] [2021-02-19 17:48:36,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:48:36,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:36,581 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:36,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411636478] [2021-02-19 17:48:36,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446926123] [2021-02-19 17:48:36,581 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 [2021-02-19 17:48:36,619 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:48:36,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:48:36,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:48:36,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:48:36,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:36,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:36,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:48:36,813 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:36,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:36,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:36,818 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 19 treesize of output 15 [2021-02-19 17:48:36,820 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:36,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:36,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:36,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:48:36,826 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:36,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:36,831 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 19 treesize of output 15 [2021-02-19 17:48:36,832 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:36,918 INFO L628 ElimStorePlain]: treesize reduction 80, result has 46.7 percent of original size [2021-02-19 17:48:36,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:36,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:36,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:48:36,923 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:48:36,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:36,926 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 [2021-02-19 17:48:36,928 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:48:36,965 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:36,967 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:48:36,967 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-02-19 17:48:37,101 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:37,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:37,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-02-19 17:48:37,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054223974] [2021-02-19 17:48:37,102 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 17:48:37,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:37,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 17:48:37,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:48:37,102 INFO L87 Difference]: Start difference. First operand 117 states and 251 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) [2021-02-19 17:48:37,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:37,857 INFO L93 Difference]: Finished difference Result 160 states and 320 transitions. [2021-02-19 17:48:37,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:48:37,858 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 [2021-02-19 17:48:37,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:37,858 INFO L225 Difference]: With dead ends: 160 [2021-02-19 17:48:37,858 INFO L226 Difference]: Without dead ends: 141 [2021-02-19 17:48:37,858 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2021-02-19 17:48:37,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-02-19 17:48:37,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 117. [2021-02-19 17:48:37,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.163793103448276) internal successors, (251), 116 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) [2021-02-19 17:48:37,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 251 transitions. [2021-02-19 17:48:37,860 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 251 transitions. Word has length 18 [2021-02-19 17:48:37,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:37,860 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 251 transitions. [2021-02-19 17:48:37,860 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) [2021-02-19 17:48:37,860 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 251 transitions. [2021-02-19 17:48:37,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:48:37,860 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:37,860 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:48:38,061 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1257 [2021-02-19 17:48:38,061 INFO L428 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:48:38,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:48:38,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1577913491, now seen corresponding path program 233 times [2021-02-19 17:48:38,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:48:38,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789568011] [2021-02-19 17:48:38,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:48:38,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:38,297 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:38,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789568011] [2021-02-19 17:48:38,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189779944] [2021-02-19 17:48:38,297 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 [2021-02-19 17:48:38,316 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 17:48:38,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:48:38,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:48:38,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:48:38,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:38,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:38,516 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 27 treesize of output 21 [2021-02-19 17:48:38,517 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:38,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:38,521 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 [2021-02-19 17:48:38,522 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:38,558 INFO L628 ElimStorePlain]: treesize reduction 36, result has 42.9 percent of original size [2021-02-19 17:48:38,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:38,561 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 10 treesize of output 6 [2021-02-19 17:48:38,563 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:48:38,574 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:38,575 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:48:38,575 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-02-19 17:48:38,637 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:38,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:38,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-02-19 17:48:38,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222007365] [2021-02-19 17:48:38,638 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 17:48:38,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:38,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 17:48:38,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:48:38,638 INFO L87 Difference]: Start difference. First operand 117 states and 251 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) [2021-02-19 17:48:39,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:39,090 INFO L93 Difference]: Finished difference Result 137 states and 287 transitions. [2021-02-19 17:48:39,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:48:39,091 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 [2021-02-19 17:48:39,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:39,092 INFO L225 Difference]: With dead ends: 137 [2021-02-19 17:48:39,092 INFO L226 Difference]: Without dead ends: 124 [2021-02-19 17:48:39,092 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:48:39,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-02-19 17:48:39,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 119. [2021-02-19 17:48:39,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.1610169491525424) internal successors, (255), 118 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:48:39,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 255 transitions. [2021-02-19 17:48:39,093 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 255 transitions. Word has length 18 [2021-02-19 17:48:39,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:39,093 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 255 transitions. [2021-02-19 17:48:39,093 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) [2021-02-19 17:48:39,093 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 255 transitions. [2021-02-19 17:48:39,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:48:39,094 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:39,094 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:48:39,294 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1260,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:48:39,294 INFO L428 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:48:39,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:48:39,294 INFO L82 PathProgramCache]: Analyzing trace with hash 1969396265, now seen corresponding path program 234 times [2021-02-19 17:48:39,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:48:39,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684557006] [2021-02-19 17:48:39,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:48:39,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:39,544 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:39,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684557006] [2021-02-19 17:48:39,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140589680] [2021-02-19 17:48:39,545 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 [2021-02-19 17:48:39,563 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:48:39,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:48:39,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-02-19 17:48:39,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:48:39,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:39,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:39,695 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 19 treesize of output 15 [2021-02-19 17:48:39,697 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:39,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:39,701 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 19 treesize of output 15 [2021-02-19 17:48:39,702 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:39,736 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:39,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:39,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:39,740 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 10 treesize of output 6 [2021-02-19 17:48:39,742 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:48:39,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:39,745 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 10 treesize of output 6 [2021-02-19 17:48:39,747 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:48:39,777 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:39,778 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:48:39,779 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-02-19 17:48:39,883 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:39,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:39,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-02-19 17:48:39,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399493392] [2021-02-19 17:48:39,883 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 17:48:39,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:39,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 17:48:39,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:48:39,884 INFO L87 Difference]: Start difference. First operand 119 states and 255 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) [2021-02-19 17:48:40,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:40,502 INFO L93 Difference]: Finished difference Result 138 states and 293 transitions. [2021-02-19 17:48:40,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:48:40,503 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 [2021-02-19 17:48:40,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:40,503 INFO L225 Difference]: With dead ends: 138 [2021-02-19 17:48:40,503 INFO L226 Difference]: Without dead ends: 129 [2021-02-19 17:48:40,504 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:48:40,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-02-19 17:48:40,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 118. [2021-02-19 17:48:40,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.1623931623931623) internal successors, (253), 117 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:48:40,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 253 transitions. [2021-02-19 17:48:40,505 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 253 transitions. Word has length 18 [2021-02-19 17:48:40,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:40,505 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 253 transitions. [2021-02-19 17:48:40,505 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) [2021-02-19 17:48:40,505 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 253 transitions. [2021-02-19 17:48:40,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:48:40,505 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:40,505 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:48:40,706 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1261,235 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:48:40,706 INFO L428 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:48:40,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:48:40,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1434166463, now seen corresponding path program 235 times [2021-02-19 17:48:40,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:48:40,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066153944] [2021-02-19 17:48:40,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:48:40,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:40,929 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:40,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066153944] [2021-02-19 17:48:40,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133797581] [2021-02-19 17:48:40,930 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 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 [2021-02-19 17:48:40,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:40,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:48:40,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:48:41,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:41,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:41,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:48:41,132 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:41,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:41,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:48:41,138 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:41,238 INFO L628 ElimStorePlain]: treesize reduction 88, result has 45.0 percent of original size [2021-02-19 17:48:41,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:41,242 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 10 treesize of output 6 [2021-02-19 17:48:41,244 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:48:41,282 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:41,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:41,286 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 [2021-02-19 17:48:41,288 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:41,323 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:41,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:41,327 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 10 treesize of output 6 [2021-02-19 17:48:41,329 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:48:41,359 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:41,361 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:48:41,361 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-02-19 17:48:41,443 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:41,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:41,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-02-19 17:48:41,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90093598] [2021-02-19 17:48:41,443 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 17:48:41,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:41,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 17:48:41,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:48:41,444 INFO L87 Difference]: Start difference. First operand 118 states and 253 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) [2021-02-19 17:48:41,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:41,833 INFO L93 Difference]: Finished difference Result 146 states and 308 transitions. [2021-02-19 17:48:41,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:48:41,833 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 [2021-02-19 17:48:41,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:41,834 INFO L225 Difference]: With dead ends: 146 [2021-02-19 17:48:41,834 INFO L226 Difference]: Without dead ends: 134 [2021-02-19 17:48:41,834 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:48:41,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-02-19 17:48:41,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 117. [2021-02-19 17:48:41,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.163793103448276) internal successors, (251), 116 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) [2021-02-19 17:48:41,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 251 transitions. [2021-02-19 17:48:41,836 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 251 transitions. Word has length 18 [2021-02-19 17:48:41,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:41,836 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 251 transitions. [2021-02-19 17:48:41,836 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) [2021-02-19 17:48:41,836 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 251 transitions. [2021-02-19 17:48:41,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:48:41,836 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:41,836 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:48:42,036 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 236 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1264 [2021-02-19 17:48:42,036 INFO L428 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:48:42,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:48:42,037 INFO L82 PathProgramCache]: Analyzing trace with hash -373324567, now seen corresponding path program 236 times [2021-02-19 17:48:42,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:48:42,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155552480] [2021-02-19 17:48:42,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:48:42,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:42,282 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:42,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155552480] [2021-02-19 17:48:42,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069553452] [2021-02-19 17:48:42,282 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 [2021-02-19 17:48:42,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:48:42,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:48:42,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:48:42,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:48:42,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:42,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:42,513 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 27 treesize of output 21 [2021-02-19 17:48:42,515 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:42,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:42,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:48:42,520 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:42,558 INFO L628 ElimStorePlain]: treesize reduction 42, result has 44.0 percent of original size [2021-02-19 17:48:42,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:42,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:48:42,563 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:42,574 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:42,575 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:48:42,576 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-02-19 17:48:42,638 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:42,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:42,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-02-19 17:48:42,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504850291] [2021-02-19 17:48:42,639 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 17:48:42,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:42,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 17:48:42,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:48:42,639 INFO L87 Difference]: Start difference. First operand 117 states and 251 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) [2021-02-19 17:48:42,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:42,971 INFO L93 Difference]: Finished difference Result 136 states and 281 transitions. [2021-02-19 17:48:42,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:48:42,971 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 [2021-02-19 17:48:42,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:42,972 INFO L225 Difference]: With dead ends: 136 [2021-02-19 17:48:42,972 INFO L226 Difference]: Without dead ends: 120 [2021-02-19 17:48:42,972 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:48:42,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-02-19 17:48:42,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2021-02-19 17:48:42,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.1596638655462184) internal successors, (257), 119 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:48:42,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 257 transitions. [2021-02-19 17:48:42,973 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 257 transitions. Word has length 18 [2021-02-19 17:48:42,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:42,974 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 257 transitions. [2021-02-19 17:48:42,974 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) [2021-02-19 17:48:42,974 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 257 transitions. [2021-02-19 17:48:42,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:48:42,974 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:42,974 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:48:43,174 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1269 [2021-02-19 17:48:43,174 INFO L428 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:48:43,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:48:43,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1122260461, now seen corresponding path program 237 times [2021-02-19 17:48:43,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:48:43,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596742681] [2021-02-19 17:48:43,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:48:43,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:43,428 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:43,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596742681] [2021-02-19 17:48:43,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081099679] [2021-02-19 17:48:43,429 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 [2021-02-19 17:48:43,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:48:43,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:48:43,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-02-19 17:48:43,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:48:43,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:43,686 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 27 treesize of output 21 [2021-02-19 17:48:43,687 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:43,698 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:43,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:43,701 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 10 treesize of output 6 [2021-02-19 17:48:43,703 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:48:43,712 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:43,713 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:48:43,713 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:13 [2021-02-19 17:48:43,739 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:43,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:43,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-02-19 17:48:43,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291103436] [2021-02-19 17:48:43,739 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:48:43,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:43,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:48:43,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:48:43,740 INFO L87 Difference]: Start difference. First operand 120 states and 257 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) [2021-02-19 17:48:44,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:44,127 INFO L93 Difference]: Finished difference Result 134 states and 281 transitions. [2021-02-19 17:48:44,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:48:44,128 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 [2021-02-19 17:48:44,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:44,128 INFO L225 Difference]: With dead ends: 134 [2021-02-19 17:48:44,128 INFO L226 Difference]: Without dead ends: 127 [2021-02-19 17:48:44,129 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:48:44,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-02-19 17:48:44,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 121. [2021-02-19 17:48:44,130 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) [2021-02-19 17:48:44,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 260 transitions. [2021-02-19 17:48:44,130 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 260 transitions. Word has length 18 [2021-02-19 17:48:44,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:44,130 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 260 transitions. [2021-02-19 17:48:44,130 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) [2021-02-19 17:48:44,130 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 260 transitions. [2021-02-19 17:48:44,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:48:44,130 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:44,130 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:48:44,331 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1270,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:48:44,331 INFO L428 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:48:44,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:48:44,331 INFO L82 PathProgramCache]: Analyzing trace with hash -730777687, now seen corresponding path program 238 times [2021-02-19 17:48:44,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:48:44,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817228696] [2021-02-19 17:48:44,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:48:44,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:44,652 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:44,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817228696] [2021-02-19 17:48:44,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063780675] [2021-02-19 17:48:44,653 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 [2021-02-19 17:48:44,670 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:48:44,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:48:44,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:48:44,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:48:44,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:44,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:44,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:48:44,863 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:44,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:44,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:44,868 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 19 treesize of output 15 [2021-02-19 17:48:44,870 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:44,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:44,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:44,875 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 19 treesize of output 15 [2021-02-19 17:48:44,875 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:44,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:44,880 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 [2021-02-19 17:48:44,881 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:44,973 INFO L628 ElimStorePlain]: treesize reduction 80, result has 45.6 percent of original size [2021-02-19 17:48:44,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:44,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:44,977 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 10 treesize of output 6 [2021-02-19 17:48:44,980 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:48:44,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:44,984 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 [2021-02-19 17:48:44,986 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:48:45,021 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:45,022 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:48:45,023 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-02-19 17:48:45,150 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:45,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:45,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-02-19 17:48:45,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256099528] [2021-02-19 17:48:45,151 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 17:48:45,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:45,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 17:48:45,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:48:45,151 INFO L87 Difference]: Start difference. First operand 121 states and 260 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) [2021-02-19 17:48:45,930 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 28 [2021-02-19 17:48:45,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:45,987 INFO L93 Difference]: Finished difference Result 164 states and 329 transitions. [2021-02-19 17:48:45,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:48:45,988 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 [2021-02-19 17:48:45,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:45,988 INFO L225 Difference]: With dead ends: 164 [2021-02-19 17:48:45,989 INFO L226 Difference]: Without dead ends: 145 [2021-02-19 17:48:45,989 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:48:45,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-02-19 17:48:45,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 119. [2021-02-19 17:48:45,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.1610169491525424) internal successors, (255), 118 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:48:45,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 255 transitions. [2021-02-19 17:48:45,990 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 255 transitions. Word has length 18 [2021-02-19 17:48:45,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:45,990 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 255 transitions. [2021-02-19 17:48:45,990 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) [2021-02-19 17:48:45,990 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 255 transitions. [2021-02-19 17:48:45,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:48:45,991 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:45,991 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:48:46,191 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1271,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:48:46,191 INFO L428 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:48:46,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:48:46,191 INFO L82 PathProgramCache]: Analyzing trace with hash -534515139, now seen corresponding path program 239 times [2021-02-19 17:48:46,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:48:46,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910354902] [2021-02-19 17:48:46,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:48:46,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:46,454 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:46,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910354902] [2021-02-19 17:48:46,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150801508] [2021-02-19 17:48:46,454 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 [2021-02-19 17:48:46,483 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:48:46,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:48:46,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:48:46,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:48:46,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:46,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:46,685 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 27 treesize of output 21 [2021-02-19 17:48:46,687 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:46,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:46,692 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 27 treesize of output 21 [2021-02-19 17:48:46,694 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:46,729 INFO L628 ElimStorePlain]: treesize reduction 36, result has 42.9 percent of original size [2021-02-19 17:48:46,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:46,733 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 10 treesize of output 6 [2021-02-19 17:48:46,735 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:48:46,746 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:46,747 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:48:46,747 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-02-19 17:48:46,803 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:46,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:46,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-02-19 17:48:46,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265834355] [2021-02-19 17:48:46,804 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 17:48:46,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:46,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 17:48:46,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:48:46,804 INFO L87 Difference]: Start difference. First operand 119 states and 255 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) [2021-02-19 17:48:47,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:47,249 INFO L93 Difference]: Finished difference Result 134 states and 278 transitions. [2021-02-19 17:48:47,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:48:47,250 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 [2021-02-19 17:48:47,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:47,251 INFO L225 Difference]: With dead ends: 134 [2021-02-19 17:48:47,251 INFO L226 Difference]: Without dead ends: 121 [2021-02-19 17:48:47,251 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:48:47,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-02-19 17:48:47,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2021-02-19 17:48:47,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.158333333333333) internal successors, (259), 120 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:48:47,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 259 transitions. [2021-02-19 17:48:47,252 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 259 transitions. Word has length 18 [2021-02-19 17:48:47,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:47,252 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 259 transitions. [2021-02-19 17:48:47,252 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) [2021-02-19 17:48:47,252 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 259 transitions. [2021-02-19 17:48:47,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:48:47,253 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:47,253 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:48:47,466 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1274,240 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:48:47,466 INFO L428 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:48:47,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:48:47,466 INFO L82 PathProgramCache]: Analyzing trace with hash -143032365, now seen corresponding path program 240 times [2021-02-19 17:48:47,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:48:47,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254167058] [2021-02-19 17:48:47,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:48:47,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:47,791 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:47,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254167058] [2021-02-19 17:48:47,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450701399] [2021-02-19 17:48:47,791 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 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 [2021-02-19 17:48:47,809 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:48:47,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:48:47,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:48:47,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:48:47,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:47,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:47,974 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 [2021-02-19 17:48:47,975 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:47,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:47,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:47,980 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 [2021-02-19 17:48:47,981 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:47,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:47,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:47,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:48:47,988 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:47,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:47,992 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 19 treesize of output 15 [2021-02-19 17:48:47,993 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:48,081 INFO L628 ElimStorePlain]: treesize reduction 80, result has 45.6 percent of original size [2021-02-19 17:48:48,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:48,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:48,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:48:48,089 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:48:48,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:48,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:48:48,094 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:48:48,126 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:48,128 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:48:48,128 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-02-19 17:48:48,248 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:48,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:48,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-02-19 17:48:48,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784658897] [2021-02-19 17:48:48,248 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 17:48:48,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:48,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 17:48:48,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:48:48,249 INFO L87 Difference]: Start difference. First operand 121 states and 259 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) [2021-02-19 17:48:49,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:49,012 INFO L93 Difference]: Finished difference Result 156 states and 314 transitions. [2021-02-19 17:48:49,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:48:49,013 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 [2021-02-19 17:48:49,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:49,014 INFO L225 Difference]: With dead ends: 156 [2021-02-19 17:48:49,014 INFO L226 Difference]: Without dead ends: 137 [2021-02-19 17:48:49,014 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:48:49,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-02-19 17:48:49,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 120. [2021-02-19 17:48:49,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.1596638655462184) internal successors, (257), 119 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:48:49,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 257 transitions. [2021-02-19 17:48:49,015 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 257 transitions. Word has length 18 [2021-02-19 17:48:49,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:49,015 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 257 transitions. [2021-02-19 17:48:49,015 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) [2021-02-19 17:48:49,015 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 257 transitions. [2021-02-19 17:48:49,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:48:49,016 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:49,016 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:48:49,230 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1275 [2021-02-19 17:48:49,230 INFO L428 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:48:49,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:48:49,230 INFO L82 PathProgramCache]: Analyzing trace with hash -678262167, now seen corresponding path program 241 times [2021-02-19 17:48:49,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:48:49,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010882294] [2021-02-19 17:48:49,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:48:49,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:49,437 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:49,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010882294] [2021-02-19 17:48:49,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158744024] [2021-02-19 17:48:49,438 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 [2021-02-19 17:48:49,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:49,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:48:49,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:48:49,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:49,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:49,597 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 19 treesize of output 15 [2021-02-19 17:48:49,599 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:49,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:49,604 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 19 treesize of output 15 [2021-02-19 17:48:49,606 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:49,713 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2021-02-19 17:48:49,713 INFO L628 ElimStorePlain]: treesize reduction 85, result has 46.9 percent of original size [2021-02-19 17:48:49,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:49,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:48:49,719 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:49,757 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:49,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:49,761 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 [2021-02-19 17:48:49,764 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:48:49,800 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:49,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:49,804 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 13 treesize of output 9 [2021-02-19 17:48:49,807 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:48:49,840 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:49,842 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:48:49,842 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-02-19 17:48:49,955 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:49,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:49,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-02-19 17:48:49,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323323706] [2021-02-19 17:48:49,955 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 17:48:49,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:49,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 17:48:49,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:48:49,956 INFO L87 Difference]: Start difference. First operand 120 states and 257 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) [2021-02-19 17:48:50,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:50,619 INFO L93 Difference]: Finished difference Result 188 states and 375 transitions. [2021-02-19 17:48:50,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:48:50,619 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 [2021-02-19 17:48:50,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:50,620 INFO L225 Difference]: With dead ends: 188 [2021-02-19 17:48:50,620 INFO L226 Difference]: Without dead ends: 162 [2021-02-19 17:48:50,620 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:48:50,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-02-19 17:48:50,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 119. [2021-02-19 17:48:50,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.1610169491525424) internal successors, (255), 118 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:48:50,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 255 transitions. [2021-02-19 17:48:50,622 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 255 transitions. Word has length 18 [2021-02-19 17:48:50,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:50,622 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 255 transitions. [2021-02-19 17:48:50,622 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) [2021-02-19 17:48:50,622 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 255 transitions. [2021-02-19 17:48:50,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:48:50,622 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:50,622 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:48:50,838 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1278 [2021-02-19 17:48:50,838 INFO L428 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:48:50,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:48:50,838 INFO L82 PathProgramCache]: Analyzing trace with hash 505720659, now seen corresponding path program 242 times [2021-02-19 17:48:50,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:48:50,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565915586] [2021-02-19 17:48:50,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:48:50,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:51,174 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:51,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565915586] [2021-02-19 17:48:51,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785213321] [2021-02-19 17:48:51,174 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 [2021-02-19 17:48:51,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:48:51,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:48:51,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:48:51,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:48:51,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:51,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:51,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:48:51,400 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:51,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:51,403 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 [2021-02-19 17:48:51,405 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:51,444 INFO L628 ElimStorePlain]: treesize reduction 42, result has 44.0 percent of original size [2021-02-19 17:48:51,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:51,448 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 21 treesize of output 13 [2021-02-19 17:48:51,449 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:51,460 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:51,461 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:48:51,461 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-02-19 17:48:51,522 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:51,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:51,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-02-19 17:48:51,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884568027] [2021-02-19 17:48:51,522 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 17:48:51,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:51,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 17:48:51,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:48:51,523 INFO L87 Difference]: Start difference. First operand 119 states and 255 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) [2021-02-19 17:48:51,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:51,865 INFO L93 Difference]: Finished difference Result 138 states and 286 transitions. [2021-02-19 17:48:51,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:48:51,866 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 [2021-02-19 17:48:51,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:51,866 INFO L225 Difference]: With dead ends: 138 [2021-02-19 17:48:51,866 INFO L226 Difference]: Without dead ends: 125 [2021-02-19 17:48:51,867 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:48:51,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-02-19 17:48:51,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 122. [2021-02-19 17:48:51,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.15702479338843) internal successors, (261), 121 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:48:51,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 261 transitions. [2021-02-19 17:48:51,868 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 261 transitions. Word has length 18 [2021-02-19 17:48:51,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:51,868 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 261 transitions. [2021-02-19 17:48:51,868 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) [2021-02-19 17:48:51,868 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 261 transitions. [2021-02-19 17:48:51,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:48:51,868 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:51,868 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:48:52,080 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1283,243 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:48:52,080 INFO L428 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:48:52,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:48:52,080 INFO L82 PathProgramCache]: Analyzing trace with hash 897203433, now seen corresponding path program 243 times [2021-02-19 17:48:52,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:48:52,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749586730] [2021-02-19 17:48:52,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:48:52,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:52,416 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:52,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749586730] [2021-02-19 17:48:52,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98097385] [2021-02-19 17:48:52,417 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 [2021-02-19 17:48:52,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:48:52,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:48:52,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-02-19 17:48:52,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:48:52,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:52,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:52,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:48:52,601 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:52,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:52,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:48:52,606 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:52,648 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:52,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:52,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:52,656 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 13 treesize of output 9 [2021-02-19 17:48:52,658 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:48:52,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:52,662 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 13 treesize of output 9 [2021-02-19 17:48:52,665 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:48:52,696 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:52,697 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:48:52,697 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-02-19 17:48:52,809 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:52,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:52,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-02-19 17:48:52,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451430131] [2021-02-19 17:48:52,809 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 17:48:52,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:52,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 17:48:52,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:48:52,810 INFO L87 Difference]: Start difference. First operand 122 states and 261 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) [2021-02-19 17:48:53,453 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 28 [2021-02-19 17:48:53,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:53,510 INFO L93 Difference]: Finished difference Result 162 states and 329 transitions. [2021-02-19 17:48:53,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:48:53,511 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 [2021-02-19 17:48:53,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:53,512 INFO L225 Difference]: With dead ends: 162 [2021-02-19 17:48:53,512 INFO L226 Difference]: Without dead ends: 146 [2021-02-19 17:48:53,512 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2021-02-19 17:48:53,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-02-19 17:48:53,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 123. [2021-02-19 17:48:53,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 2.1639344262295084) internal successors, (264), 122 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) [2021-02-19 17:48:53,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 264 transitions. [2021-02-19 17:48:53,513 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 264 transitions. Word has length 18 [2021-02-19 17:48:53,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:53,513 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 264 transitions. [2021-02-19 17:48:53,513 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) [2021-02-19 17:48:53,513 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 264 transitions. [2021-02-19 17:48:53,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:48:53,514 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:53,514 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:48:53,714 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1284,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:48:53,714 INFO L428 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:48:53,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:48:53,714 INFO L82 PathProgramCache]: Analyzing trace with hash 361973631, now seen corresponding path program 244 times [2021-02-19 17:48:53,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:48:53,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314509762] [2021-02-19 17:48:53,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:48:53,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:53,948 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:53,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314509762] [2021-02-19 17:48:53,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142761134] [2021-02-19 17:48:53,949 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 [2021-02-19 17:48:53,969 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:48:53,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:48:53,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:48:53,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:48:54,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:54,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:54,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:48:54,167 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:54,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:54,171 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 19 treesize of output 15 [2021-02-19 17:48:54,172 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:54,275 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2021-02-19 17:48:54,275 INFO L628 ElimStorePlain]: treesize reduction 88, result has 45.0 percent of original size [2021-02-19 17:48:54,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:54,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:48:54,282 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:48:54,325 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:54,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:54,329 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 19 treesize of output 15 [2021-02-19 17:48:54,331 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:54,367 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:54,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:54,371 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 10 treesize of output 6 [2021-02-19 17:48:54,373 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:48:54,406 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:54,408 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:48:54,408 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-02-19 17:48:54,531 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:54,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:54,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-02-19 17:48:54,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164714726] [2021-02-19 17:48:54,532 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 17:48:54,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:54,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 17:48:54,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:48:54,532 INFO L87 Difference]: Start difference. First operand 123 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) [2021-02-19 17:48:55,390 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-02-19 17:48:55,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:55,507 INFO L93 Difference]: Finished difference Result 191 states and 382 transitions. [2021-02-19 17:48:55,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:48:55,508 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 [2021-02-19 17:48:55,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:55,508 INFO L225 Difference]: With dead ends: 191 [2021-02-19 17:48:55,508 INFO L226 Difference]: Without dead ends: 165 [2021-02-19 17:48:55,509 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=109, Invalid=703, Unknown=0, NotChecked=0, Total=812 [2021-02-19 17:48:55,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-02-19 17:48:55,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 123. [2021-02-19 17:48:55,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 2.1639344262295084) internal successors, (264), 122 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) [2021-02-19 17:48:55,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 264 transitions. [2021-02-19 17:48:55,510 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 264 transitions. Word has length 18 [2021-02-19 17:48:55,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:55,510 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 264 transitions. [2021-02-19 17:48:55,510 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) [2021-02-19 17:48:55,510 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 264 transitions. [2021-02-19 17:48:55,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:48:55,510 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:55,510 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:48:55,713 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1287 [2021-02-19 17:48:55,714 INFO L428 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:48:55,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:48:55,714 INFO L82 PathProgramCache]: Analyzing trace with hash 949718953, now seen corresponding path program 245 times [2021-02-19 17:48:55,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:48:55,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455950903] [2021-02-19 17:48:55,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:48:55,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:55,944 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:55,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455950903] [2021-02-19 17:48:55,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256654929] [2021-02-19 17:48:55,945 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 [2021-02-19 17:48:55,964 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:48:55,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:48:55,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:48:55,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:48:56,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:56,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:56,256 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 [2021-02-19 17:48:56,257 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:56,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:56,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:48:56,264 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:56,368 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2021-02-19 17:48:56,368 INFO L628 ElimStorePlain]: treesize reduction 85, result has 45.9 percent of original size [2021-02-19 17:48:56,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:56,373 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 10 treesize of output 6 [2021-02-19 17:48:56,375 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:48:56,415 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:56,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:56,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:48:56,421 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:56,458 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:56,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:56,476 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 13 treesize of output 9 [2021-02-19 17:48:56,478 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:48:56,513 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:56,515 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:48:56,515 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-02-19 17:48:56,642 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:56,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:56,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-02-19 17:48:56,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424953668] [2021-02-19 17:48:56,642 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 17:48:56,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:56,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 17:48:56,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:48:56,643 INFO L87 Difference]: Start difference. First operand 123 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) [2021-02-19 17:48:57,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:57,279 INFO L93 Difference]: Finished difference Result 154 states and 325 transitions. [2021-02-19 17:48:57,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:48:57,280 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 [2021-02-19 17:48:57,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:57,280 INFO L225 Difference]: With dead ends: 154 [2021-02-19 17:48:57,280 INFO L226 Difference]: Without dead ends: 142 [2021-02-19 17:48:57,281 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:48:57,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-02-19 17:48:57,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 124. [2021-02-19 17:48:57,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.1707317073170733) internal successors, (267), 123 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:48:57,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 267 transitions. [2021-02-19 17:48:57,282 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 267 transitions. Word has length 18 [2021-02-19 17:48:57,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:57,282 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 267 transitions. [2021-02-19 17:48:57,282 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) [2021-02-19 17:48:57,282 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 267 transitions. [2021-02-19 17:48:57,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:48:57,282 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:57,282 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:48:57,483 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1292,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:48:57,483 INFO L428 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:48:57,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:48:57,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1434102657, now seen corresponding path program 246 times [2021-02-19 17:48:57,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:48:57,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417314603] [2021-02-19 17:48:57,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:48:57,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:57,702 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:57,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417314603] [2021-02-19 17:48:57,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156233362] [2021-02-19 17:48:57,702 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 [2021-02-19 17:48:57,721 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:48:57,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:48:57,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:48:57,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:48:57,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:57,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:57,892 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 27 treesize of output 21 [2021-02-19 17:48:57,894 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:57,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:57,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:48:57,899 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:57,937 INFO L628 ElimStorePlain]: treesize reduction 42, result has 39.1 percent of original size [2021-02-19 17:48:57,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:57,940 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 10 treesize of output 6 [2021-02-19 17:48:57,942 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:48:57,953 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:57,955 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:48:57,955 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-02-19 17:48:58,016 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:58,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:58,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-02-19 17:48:58,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471263729] [2021-02-19 17:48:58,017 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 17:48:58,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:58,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 17:48:58,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:48:58,017 INFO L87 Difference]: Start difference. First operand 124 states and 267 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) [2021-02-19 17:48:58,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:58,484 INFO L93 Difference]: Finished difference Result 145 states and 301 transitions. [2021-02-19 17:48:58,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:48:58,485 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 [2021-02-19 17:48:58,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:58,485 INFO L225 Difference]: With dead ends: 145 [2021-02-19 17:48:58,485 INFO L226 Difference]: Without dead ends: 129 [2021-02-19 17:48:58,485 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:48:58,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-02-19 17:48:58,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2021-02-19 17:48:58,487 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) [2021-02-19 17:48:58,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 275 transitions. [2021-02-19 17:48:58,487 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 275 transitions. Word has length 18 [2021-02-19 17:48:58,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:58,487 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 275 transitions. [2021-02-19 17:48:58,487 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) [2021-02-19 17:48:58,487 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 275 transitions. [2021-02-19 17:48:58,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:48:58,487 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:58,487 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:48:58,688 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1297 [2021-02-19 17:48:58,688 INFO L428 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:48:58,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:48:58,688 INFO L82 PathProgramCache]: Analyzing trace with hash 2111928745, now seen corresponding path program 247 times [2021-02-19 17:48:58,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:48:58,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927751373] [2021-02-19 17:48:58,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:48:58,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:58,925 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:58,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927751373] [2021-02-19 17:48:58,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878359479] [2021-02-19 17:48:58,925 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 [2021-02-19 17:48:58,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:58,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:48:58,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:48:59,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:59,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:59,183 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 27 treesize of output 21 [2021-02-19 17:48:59,184 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:59,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:59,188 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 [2021-02-19 17:48:59,190 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:59,229 INFO L628 ElimStorePlain]: treesize reduction 48, result has 36.0 percent of original size [2021-02-19 17:48:59,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:59,233 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 10 treesize of output 6 [2021-02-19 17:48:59,236 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:48:59,247 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:59,248 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:48:59,249 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-02-19 17:48:59,316 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:59,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:59,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-02-19 17:48:59,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915426138] [2021-02-19 17:48:59,317 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 17:48:59,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:59,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 17:48:59,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:48:59,317 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) [2021-02-19 17:48:59,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:59,925 INFO L93 Difference]: Finished difference Result 150 states and 308 transitions. [2021-02-19 17:48:59,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:48:59,926 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 [2021-02-19 17:48:59,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:59,927 INFO L225 Difference]: With dead ends: 150 [2021-02-19 17:48:59,927 INFO L226 Difference]: Without dead ends: 131 [2021-02-19 17:48:59,927 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:48:59,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-02-19 17:48:59,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 129. [2021-02-19 17:48:59,928 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) [2021-02-19 17:48:59,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 277 transitions. [2021-02-19 17:48:59,928 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 277 transitions. Word has length 18 [2021-02-19 17:48:59,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:59,928 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 277 transitions. [2021-02-19 17:48:59,928 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) [2021-02-19 17:48:59,928 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 277 transitions. [2021-02-19 17:48:59,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:48:59,929 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:59,929 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:49:00,129 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 248 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1298 [2021-02-19 17:49:00,129 INFO L428 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:49:00,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:49:00,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1791555777, now seen corresponding path program 248 times [2021-02-19 17:49:00,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:49:00,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766693051] [2021-02-19 17:49:00,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:49:00,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:49:00,372 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:00,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766693051] [2021-02-19 17:49:00,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943361065] [2021-02-19 17:49:00,372 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 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 [2021-02-19 17:49:00,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:49:00,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:49:00,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-02-19 17:49:00,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:49:00,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:00,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:00,609 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 19 treesize of output 15 [2021-02-19 17:49:00,611 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:00,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:00,615 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 [2021-02-19 17:49:00,617 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:00,648 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:00,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:00,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:00,653 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 [2021-02-19 17:49:00,656 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:49:00,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:00,660 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 [2021-02-19 17:49:00,663 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:49:00,697 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:00,699 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:49:00,699 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-02-19 17:49:00,834 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:00,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:49:00,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-02-19 17:49:00,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170444383] [2021-02-19 17:49:00,835 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 17:49:00,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:49:00,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 17:49:00,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:49:00,835 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) [2021-02-19 17:49:01,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:49:01,824 INFO L93 Difference]: Finished difference Result 174 states and 356 transitions. [2021-02-19 17:49:01,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:49:01,825 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 [2021-02-19 17:49:01,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:49:01,826 INFO L225 Difference]: With dead ends: 174 [2021-02-19 17:49:01,826 INFO L226 Difference]: Without dead ends: 158 [2021-02-19 17:49:01,826 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2021-02-19 17:49:01,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-02-19 17:49:01,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 128. [2021-02-19 17:49:01,827 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) [2021-02-19 17:49:01,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 275 transitions. [2021-02-19 17:49:01,828 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 275 transitions. Word has length 18 [2021-02-19 17:49:01,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:49:01,828 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 275 transitions. [2021-02-19 17:49:01,828 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) [2021-02-19 17:49:01,828 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 275 transitions. [2021-02-19 17:49:01,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:49:01,828 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:49:01,828 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:49:02,028 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1299 [2021-02-19 17:49:02,029 INFO L428 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:49:02,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:49:02,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1595293229, now seen corresponding path program 249 times [2021-02-19 17:49:02,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:49:02,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81845206] [2021-02-19 17:49:02,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:49:02,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:49:02,322 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:02,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81845206] [2021-02-19 17:49:02,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846410632] [2021-02-19 17:49:02,323 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 [2021-02-19 17:49:02,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:49:02,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:49:02,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:49:02,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:49:02,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:02,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:02,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:49:02,578 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:02,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:02,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:49:02,584 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:02,615 INFO L628 ElimStorePlain]: treesize reduction 36, result has 47.8 percent of original size [2021-02-19 17:49:02,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:02,618 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 21 treesize of output 13 [2021-02-19 17:49:02,619 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:02,627 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:02,628 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:49:02,628 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-02-19 17:49:02,667 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:02,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:49:02,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-02-19 17:49:02,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413472199] [2021-02-19 17:49:02,667 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 17:49:02,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:49:02,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 17:49:02,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:49:02,668 INFO L87 Difference]: Start difference. First operand 128 states and 275 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) [2021-02-19 17:49:03,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:49:03,117 INFO L93 Difference]: Finished difference Result 149 states and 313 transitions. [2021-02-19 17:49:03,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:49:03,118 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 [2021-02-19 17:49:03,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:49:03,119 INFO L225 Difference]: With dead ends: 149 [2021-02-19 17:49:03,119 INFO L226 Difference]: Without dead ends: 136 [2021-02-19 17:49:03,119 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:49:03,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-02-19 17:49:03,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 130. [2021-02-19 17:49:03,120 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) [2021-02-19 17:49:03,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 279 transitions. [2021-02-19 17:49:03,120 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 279 transitions. Word has length 18 [2021-02-19 17:49:03,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:49:03,120 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 279 transitions. [2021-02-19 17:49:03,120 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) [2021-02-19 17:49:03,120 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 279 transitions. [2021-02-19 17:49:03,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:49:03,121 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:49:03,121 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:49:03,324 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1302 [2021-02-19 17:49:03,324 INFO L428 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:49:03,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:49:03,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1203810455, now seen corresponding path program 250 times [2021-02-19 17:49:03,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:49:03,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057339612] [2021-02-19 17:49:03,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:49:03,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:49:03,639 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:03,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057339612] [2021-02-19 17:49:03,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529989200] [2021-02-19 17:49:03,639 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 [2021-02-19 17:49:03,658 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:49:03,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:49:03,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:49:03,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:49:03,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:03,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:03,842 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 19 treesize of output 15 [2021-02-19 17:49:03,843 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:03,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:03,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:03,849 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 19 treesize of output 15 [2021-02-19 17:49:03,851 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:03,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:03,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:03,856 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 19 treesize of output 15 [2021-02-19 17:49:03,858 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:03,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:03,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:49:03,864 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:03,966 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-02-19 17:49:03,966 INFO L628 ElimStorePlain]: treesize reduction 77, result has 46.5 percent of original size [2021-02-19 17:49:03,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:03,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:03,972 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 10 treesize of output 6 [2021-02-19 17:49:03,974 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:49:03,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:03,979 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 13 treesize of output 9 [2021-02-19 17:49:03,981 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:49:04,019 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:04,020 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:49:04,020 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-02-19 17:49:04,150 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:04,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:49:04,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-02-19 17:49:04,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882418696] [2021-02-19 17:49:04,151 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 17:49:04,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:49:04,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 17:49:04,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:49:04,151 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) [2021-02-19 17:49:04,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:49:04,789 INFO L93 Difference]: Finished difference Result 146 states and 305 transitions. [2021-02-19 17:49:04,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:49:04,791 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 [2021-02-19 17:49:04,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:49:04,792 INFO L225 Difference]: With dead ends: 146 [2021-02-19 17:49:04,792 INFO L226 Difference]: Without dead ends: 134 [2021-02-19 17:49:04,792 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:49:04,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-02-19 17:49:04,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 130. [2021-02-19 17:49:04,793 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) [2021-02-19 17:49:04,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 279 transitions. [2021-02-19 17:49:04,793 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 279 transitions. Word has length 18 [2021-02-19 17:49:04,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:49:04,793 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 279 transitions. [2021-02-19 17:49:04,793 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) [2021-02-19 17:49:04,794 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 279 transitions. [2021-02-19 17:49:04,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:49:04,794 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:49:04,794 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:49:04,999 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1303 [2021-02-19 17:49:04,999 INFO L428 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:49:04,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:49:04,999 INFO L82 PathProgramCache]: Analyzing trace with hash -1739040257, now seen corresponding path program 251 times [2021-02-19 17:49:04,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:49:04,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488418815] [2021-02-19 17:49:04,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:49:05,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:49:05,203 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:05,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488418815] [2021-02-19 17:49:05,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345652580] [2021-02-19 17:49:05,203 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 [2021-02-19 17:49:05,222 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 17:49:05,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:49:05,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:49:05,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:49:05,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:05,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:05,428 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 19 treesize of output 15 [2021-02-19 17:49:05,429 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:05,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:05,434 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 19 treesize of output 15 [2021-02-19 17:49:05,436 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:05,552 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2021-02-19 17:49:05,553 INFO L628 ElimStorePlain]: treesize reduction 85, result has 45.9 percent of original size [2021-02-19 17:49:05,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:05,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:49:05,558 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:05,598 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:05,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:05,602 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 10 treesize of output 6 [2021-02-19 17:49:05,605 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:49:05,650 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:05,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:05,654 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 [2021-02-19 17:49:05,657 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:49:05,692 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:05,694 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:49:05,694 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-02-19 17:49:05,817 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:05,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:49:05,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-02-19 17:49:05,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248759007] [2021-02-19 17:49:05,818 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 17:49:05,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:49:05,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 17:49:05,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:49:05,818 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) [2021-02-19 17:49:06,700 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-02-19 17:49:06,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:49:06,875 INFO L93 Difference]: Finished difference Result 211 states and 424 transitions. [2021-02-19 17:49:06,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:49:06,876 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 [2021-02-19 17:49:06,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:49:06,877 INFO L225 Difference]: With dead ends: 211 [2021-02-19 17:49:06,877 INFO L226 Difference]: Without dead ends: 185 [2021-02-19 17:49:06,877 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:49:06,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-02-19 17:49:06,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 130. [2021-02-19 17:49:06,878 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) [2021-02-19 17:49:06,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 279 transitions. [2021-02-19 17:49:06,879 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 279 transitions. Word has length 18 [2021-02-19 17:49:06,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:49:06,879 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 279 transitions. [2021-02-19 17:49:06,879 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) [2021-02-19 17:49:06,879 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 279 transitions. [2021-02-19 17:49:06,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:49:06,879 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:49:06,879 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:49:07,079 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1306 [2021-02-19 17:49:07,080 INFO L428 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:49:07,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:49:07,080 INFO L82 PathProgramCache]: Analyzing trace with hash -555057431, now seen corresponding path program 252 times [2021-02-19 17:49:07,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:49:07,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880646746] [2021-02-19 17:49:07,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:49:07,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:49:07,280 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:07,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880646746] [2021-02-19 17:49:07,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821442554] [2021-02-19 17:49:07,280 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 [2021-02-19 17:49:07,301 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:49:07,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:49:07,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:49:07,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:49:07,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:07,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:07,516 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 27 treesize of output 21 [2021-02-19 17:49:07,517 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:07,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:07,521 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 [2021-02-19 17:49:07,523 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:07,565 INFO L628 ElimStorePlain]: treesize reduction 48, result has 36.0 percent of original size [2021-02-19 17:49:07,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:07,569 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 [2021-02-19 17:49:07,572 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:49:07,583 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:07,585 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:49:07,585 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-02-19 17:49:07,644 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:07,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:49:07,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-02-19 17:49:07,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565514129] [2021-02-19 17:49:07,644 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 17:49:07,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:49:07,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 17:49:07,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:49:07,645 INFO L87 Difference]: Start difference. First operand 130 states and 279 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) [2021-02-19 17:49:08,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:49:08,115 INFO L93 Difference]: Finished difference Result 149 states and 313 transitions. [2021-02-19 17:49:08,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:49:08,116 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 [2021-02-19 17:49:08,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:49:08,116 INFO L225 Difference]: With dead ends: 149 [2021-02-19 17:49:08,117 INFO L226 Difference]: Without dead ends: 136 [2021-02-19 17:49:08,117 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:49:08,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-02-19 17:49:08,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 133. [2021-02-19 17:49:08,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.159090909090909) internal successors, (285), 132 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) [2021-02-19 17:49:08,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 285 transitions. [2021-02-19 17:49:08,118 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 285 transitions. Word has length 18 [2021-02-19 17:49:08,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:49:08,118 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 285 transitions. [2021-02-19 17:49:08,118 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) [2021-02-19 17:49:08,118 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 285 transitions. [2021-02-19 17:49:08,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:49:08,119 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:49:08,119 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:49:08,319 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1311 [2021-02-19 17:49:08,319 INFO L428 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:49:08,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:49:08,319 INFO L82 PathProgramCache]: Analyzing trace with hash -163574657, now seen corresponding path program 253 times [2021-02-19 17:49:08,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:49:08,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718812365] [2021-02-19 17:49:08,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:49:08,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:49:08,671 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:08,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718812365] [2021-02-19 17:49:08,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061145561] [2021-02-19 17:49:08,672 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 [2021-02-19 17:49:08,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:49:08,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:49:08,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:49:08,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:08,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:08,872 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 19 treesize of output 15 [2021-02-19 17:49:08,873 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:08,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:08,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:08,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:49:08,881 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:08,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:08,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:08,886 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 [2021-02-19 17:49:08,888 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:08,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:08,892 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 [2021-02-19 17:49:08,894 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:08,995 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 29 [2021-02-19 17:49:08,996 INFO L628 ElimStorePlain]: treesize reduction 80, result has 44.4 percent of original size [2021-02-19 17:49:08,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:09,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:09,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:49:09,003 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:49:09,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:09,007 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 10 treesize of output 6 [2021-02-19 17:49:09,010 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:49:09,050 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:09,052 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:49:09,053 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-02-19 17:49:09,151 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:09,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:49:09,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-02-19 17:49:09,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337183419] [2021-02-19 17:49:09,151 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 17:49:09,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:49:09,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 17:49:09,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:49:09,152 INFO L87 Difference]: Start difference. First operand 133 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) [2021-02-19 17:49:09,811 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 28 [2021-02-19 17:49:09,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:49:09,882 INFO L93 Difference]: Finished difference Result 168 states and 340 transitions. [2021-02-19 17:49:09,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:49:09,883 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 [2021-02-19 17:49:09,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:49:09,883 INFO L225 Difference]: With dead ends: 168 [2021-02-19 17:49:09,883 INFO L226 Difference]: Without dead ends: 149 [2021-02-19 17:49:09,883 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:49:09,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-02-19 17:49:09,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 132. [2021-02-19 17:49:09,885 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) [2021-02-19 17:49:09,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 283 transitions. [2021-02-19 17:49:09,885 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 283 transitions. Word has length 18 [2021-02-19 17:49:09,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:49:09,885 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 283 transitions. [2021-02-19 17:49:09,885 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) [2021-02-19 17:49:09,885 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 283 transitions. [2021-02-19 17:49:09,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:49:09,885 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:49:09,885 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:49:10,101 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1312,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:49:10,102 INFO L428 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:49:10,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:49:10,102 INFO L82 PathProgramCache]: Analyzing trace with hash -698804459, now seen corresponding path program 254 times [2021-02-19 17:49:10,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:49:10,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508026637] [2021-02-19 17:49:10,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:49:10,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:49:10,519 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2021-02-19 17:49:10,571 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:10,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508026637] [2021-02-19 17:49:10,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998114050] [2021-02-19 17:49:10,571 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 [2021-02-19 17:49:10,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:49:10,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:49:10,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-02-19 17:49:10,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:49:10,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:10,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:10,772 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 19 treesize of output 15 [2021-02-19 17:49:10,774 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:10,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:10,778 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 [2021-02-19 17:49:10,780 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:10,819 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:10,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:10,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:10,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:49:10,828 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:49:10,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:10,832 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 10 treesize of output 6 [2021-02-19 17:49:10,835 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:49:10,869 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:10,871 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:49:10,871 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-02-19 17:49:11,011 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:11,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:49:11,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-02-19 17:49:11,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542403997] [2021-02-19 17:49:11,011 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 17:49:11,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:49:11,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 17:49:11,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:49:11,012 INFO L87 Difference]: Start difference. First operand 132 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) [2021-02-19 17:49:11,819 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-02-19 17:49:12,203 WARN L202 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 45 [2021-02-19 17:49:12,398 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2021-02-19 17:49:12,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:49:12,461 INFO L93 Difference]: Finished difference Result 196 states and 396 transitions. [2021-02-19 17:49:12,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:49:12,462 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 [2021-02-19 17:49:12,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:49:12,463 INFO L225 Difference]: With dead ends: 196 [2021-02-19 17:49:12,463 INFO L226 Difference]: Without dead ends: 173 [2021-02-19 17:49:12,463 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=130, Invalid=862, Unknown=0, NotChecked=0, Total=992 [2021-02-19 17:49:12,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-02-19 17:49:12,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 134. [2021-02-19 17:49:12,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.172932330827068) internal successors, (289), 133 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:49:12,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 289 transitions. [2021-02-19 17:49:12,465 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 289 transitions. Word has length 18 [2021-02-19 17:49:12,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:49:12,465 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 289 transitions. [2021-02-19 17:49:12,465 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) [2021-02-19 17:49:12,465 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 289 transitions. [2021-02-19 17:49:12,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:49:12,465 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:49:12,465 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:49:12,665 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1315 [2021-02-19 17:49:12,666 INFO L428 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:49:12,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:49:12,666 INFO L82 PathProgramCache]: Analyzing trace with hash -111059137, now seen corresponding path program 255 times [2021-02-19 17:49:12,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:49:12,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274356803] [2021-02-19 17:49:12,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:49:12,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:49:12,924 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:12,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274356803] [2021-02-19 17:49:12,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844553096] [2021-02-19 17:49:12,925 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 [2021-02-19 17:49:12,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:49:12,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:49:12,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-02-19 17:49:12,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:49:13,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:13,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:49:13,267 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:13,306 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:13,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:13,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:49:13,313 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:13,349 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:13,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:13,353 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 13 treesize of output 9 [2021-02-19 17:49:13,356 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:49:13,391 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:13,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:13,396 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 13 treesize of output 9 [2021-02-19 17:49:13,399 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:49:13,433 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:13,435 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:49:13,435 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:35 [2021-02-19 17:49:13,597 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:13,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:49:13,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-02-19 17:49:13,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280894767] [2021-02-19 17:49:13,598 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 17:49:13,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:49:13,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 17:49:13,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:49:13,598 INFO L87 Difference]: Start difference. First operand 134 states and 289 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) [2021-02-19 17:49:14,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:49:14,319 INFO L93 Difference]: Finished difference Result 165 states and 345 transitions. [2021-02-19 17:49:14,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:49:14,320 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 [2021-02-19 17:49:14,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:49:14,321 INFO L225 Difference]: With dead ends: 165 [2021-02-19 17:49:14,321 INFO L226 Difference]: Without dead ends: 151 [2021-02-19 17:49:14,321 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:49:14,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-02-19 17:49:14,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 134. [2021-02-19 17:49:14,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.172932330827068) internal successors, (289), 133 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:49:14,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 289 transitions. [2021-02-19 17:49:14,323 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 289 transitions. Word has length 18 [2021-02-19 17:49:14,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:49:14,323 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 289 transitions. [2021-02-19 17:49:14,323 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) [2021-02-19 17:49:14,323 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 289 transitions. [2021-02-19 17:49:14,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:49:14,323 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:49:14,323 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:49:14,538 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1318,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:49:14,538 INFO L428 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:49:14,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:49:14,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1627481235, now seen corresponding path program 256 times [2021-02-19 17:49:14,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:49:14,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235206198] [2021-02-19 17:49:14,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:49:14,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:49:14,724 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:14,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235206198] [2021-02-19 17:49:14,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373019001] [2021-02-19 17:49:14,725 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 [2021-02-19 17:49:14,744 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:49:14,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:49:14,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:49:14,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:49:14,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:14,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:14,981 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 27 treesize of output 21 [2021-02-19 17:49:14,983 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:14,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:14,986 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 27 treesize of output 21 [2021-02-19 17:49:14,987 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:15,025 INFO L628 ElimStorePlain]: treesize reduction 48, result has 36.0 percent of original size [2021-02-19 17:49:15,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:15,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:49:15,031 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:49:15,044 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:15,045 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:49:15,045 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-02-19 17:49:15,116 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:15,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:49:15,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-02-19 17:49:15,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216956085] [2021-02-19 17:49:15,117 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 17:49:15,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:49:15,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 17:49:15,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:49:15,118 INFO L87 Difference]: Start difference. First operand 134 states and 289 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) [2021-02-19 17:49:15,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:49:15,616 INFO L93 Difference]: Finished difference Result 154 states and 325 transitions. [2021-02-19 17:49:15,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:49:15,616 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 [2021-02-19 17:49:15,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:49:15,617 INFO L225 Difference]: With dead ends: 154 [2021-02-19 17:49:15,617 INFO L226 Difference]: Without dead ends: 141 [2021-02-19 17:49:15,617 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:49:15,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-02-19 17:49:15,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 138. [2021-02-19 17:49:15,618 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) [2021-02-19 17:49:15,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 297 transitions. [2021-02-19 17:49:15,619 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 297 transitions. Word has length 18 [2021-02-19 17:49:15,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:49:15,619 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 297 transitions. [2021-02-19 17:49:15,619 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) [2021-02-19 17:49:15,619 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 297 transitions. [2021-02-19 17:49:15,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:49:15,619 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:49:15,619 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:49:15,826 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1325 [2021-02-19 17:49:15,826 INFO L428 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:49:15,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:49:15,826 INFO L82 PathProgramCache]: Analyzing trace with hash 2018964009, now seen corresponding path program 257 times [2021-02-19 17:49:15,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:49:15,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117761253] [2021-02-19 17:49:15,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:49:15,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:49:16,174 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:16,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117761253] [2021-02-19 17:49:16,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135872679] [2021-02-19 17:49:16,174 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 [2021-02-19 17:49:16,193 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 17:49:16,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:49:16,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:49:16,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:49:16,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:16,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:16,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:49:16,378 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:16,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:16,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:16,383 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 19 treesize of output 15 [2021-02-19 17:49:16,385 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:16,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:16,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:16,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:49:16,393 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:16,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:16,402 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 19 treesize of output 15 [2021-02-19 17:49:16,404 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:16,500 INFO L628 ElimStorePlain]: treesize reduction 80, result has 46.7 percent of original size [2021-02-19 17:49:16,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:16,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:16,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:49:16,508 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:49:16,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:16,512 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 13 treesize of output 9 [2021-02-19 17:49:16,515 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:49:16,552 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:16,554 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:49:16,554 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-02-19 17:49:16,699 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:16,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:49:16,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-02-19 17:49:16,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007472570] [2021-02-19 17:49:16,700 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 17:49:16,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:49:16,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 17:49:16,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:49:16,700 INFO L87 Difference]: Start difference. First operand 138 states and 297 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) [2021-02-19 17:49:17,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:49:17,261 INFO L93 Difference]: Finished difference Result 173 states and 352 transitions. [2021-02-19 17:49:17,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:49:17,262 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 [2021-02-19 17:49:17,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:49:17,262 INFO L225 Difference]: With dead ends: 173 [2021-02-19 17:49:17,262 INFO L226 Difference]: Without dead ends: 154 [2021-02-19 17:49:17,263 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:49:17,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-02-19 17:49:17,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 137. [2021-02-19 17:49:17,264 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) [2021-02-19 17:49:17,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 295 transitions. [2021-02-19 17:49:17,264 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 295 transitions. Word has length 18 [2021-02-19 17:49:17,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:49:17,264 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 295 transitions. [2021-02-19 17:49:17,264 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) [2021-02-19 17:49:17,264 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 295 transitions. [2021-02-19 17:49:17,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:49:17,264 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:49:17,264 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:49:17,470 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1326,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:49:17,470 INFO L428 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:49:17,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:49:17,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1483734207, now seen corresponding path program 258 times [2021-02-19 17:49:17,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:49:17,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820764041] [2021-02-19 17:49:17,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:49:17,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:49:17,753 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:17,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820764041] [2021-02-19 17:49:17,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703501795] [2021-02-19 17:49:17,754 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 [2021-02-19 17:49:17,773 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:49:17,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:49:17,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-02-19 17:49:17,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:49:18,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:18,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:49:18,016 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:18,061 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:18,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:18,066 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 10 treesize of output 6 [2021-02-19 17:49:18,069 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:49:18,115 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:18,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:18,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:49:18,121 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:18,163 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:18,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:18,168 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 10 treesize of output 6 [2021-02-19 17:49:18,171 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:49:18,210 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:18,212 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:49:18,212 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:35 [2021-02-19 17:49:18,386 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:18,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:49:18,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-02-19 17:49:18,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423562733] [2021-02-19 17:49:18,387 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 17:49:18,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:49:18,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 17:49:18,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:49:18,388 INFO L87 Difference]: Start difference. First operand 137 states and 295 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) [2021-02-19 17:49:18,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:49:18,979 INFO L93 Difference]: Finished difference Result 162 states and 339 transitions. [2021-02-19 17:49:18,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:49:18,980 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 [2021-02-19 17:49:18,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:49:18,980 INFO L225 Difference]: With dead ends: 162 [2021-02-19 17:49:18,980 INFO L226 Difference]: Without dead ends: 148 [2021-02-19 17:49:18,980 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:49:18,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-02-19 17:49:18,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 137. [2021-02-19 17:49:18,981 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) [2021-02-19 17:49:18,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 295 transitions. [2021-02-19 17:49:18,982 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 295 transitions. Word has length 18 [2021-02-19 17:49:18,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:49:18,982 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 295 transitions. [2021-02-19 17:49:18,982 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) [2021-02-19 17:49:18,982 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 295 transitions. [2021-02-19 17:49:18,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:49:18,982 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:49:18,982 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:49:19,197 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1329 [2021-02-19 17:49:19,197 INFO L428 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:49:19,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:49:19,198 INFO L82 PathProgramCache]: Analyzing trace with hash 2071479529, now seen corresponding path program 259 times [2021-02-19 17:49:19,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:49:19,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250217408] [2021-02-19 17:49:19,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:49:19,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:49:19,556 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:19,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250217408] [2021-02-19 17:49:19,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496548303] [2021-02-19 17:49:19,557 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 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 [2021-02-19 17:49:19,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:49:19,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:49:19,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:49:19,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:19,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:19,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:49:19,905 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:19,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:19,910 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 19 treesize of output 15 [2021-02-19 17:49:19,911 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:20,040 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2021-02-19 17:49:20,041 INFO L628 ElimStorePlain]: treesize reduction 85, result has 45.9 percent of original size [2021-02-19 17:49:20,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:20,046 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 10 treesize of output 6 [2021-02-19 17:49:20,049 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:49:20,101 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:20,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:20,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:49:20,107 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:20,149 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:20,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:20,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:49:20,157 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:49:20,198 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:20,200 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:49:20,201 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-02-19 17:49:20,363 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:20,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:49:20,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-02-19 17:49:20,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098227851] [2021-02-19 17:49:20,364 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 17:49:20,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:49:20,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 17:49:20,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:49:20,364 INFO L87 Difference]: Start difference. First operand 137 states and 295 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) [2021-02-19 17:49:20,676 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2021-02-19 17:49:21,232 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2021-02-19 17:49:21,486 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2021-02-19 17:49:21,667 WARN L202 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 46 [2021-02-19 17:49:21,861 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-02-19 17:49:22,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:49:22,049 INFO L93 Difference]: Finished difference Result 226 states and 450 transitions. [2021-02-19 17:49:22,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:49:22,050 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 [2021-02-19 17:49:22,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:49:22,051 INFO L225 Difference]: With dead ends: 226 [2021-02-19 17:49:22,051 INFO L226 Difference]: Without dead ends: 193 [2021-02-19 17:49:22,051 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2021-02-19 17:49:22,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-02-19 17:49:22,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 140. [2021-02-19 17:49:22,053 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) [2021-02-19 17:49:22,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 303 transitions. [2021-02-19 17:49:22,053 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 303 transitions. Word has length 18 [2021-02-19 17:49:22,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:49:22,053 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 303 transitions. [2021-02-19 17:49:22,053 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) [2021-02-19 17:49:22,053 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 303 transitions. [2021-02-19 17:49:22,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:49:22,054 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:49:22,054 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:49:22,254 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1336,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:49:22,254 INFO L428 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:49:22,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:49:22,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1183251969, now seen corresponding path program 260 times [2021-02-19 17:49:22,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:49:22,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434465767] [2021-02-19 17:49:22,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:49:22,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:49:22,570 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:22,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434465767] [2021-02-19 17:49:22,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821395671] [2021-02-19 17:49:22,570 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 [2021-02-19 17:49:22,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:49:22,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:49:22,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-02-19 17:49:22,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:49:22,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:22,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:22,866 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 [2021-02-19 17:49:22,868 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:22,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:22,873 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 19 treesize of output 15 [2021-02-19 17:49:22,875 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:22,926 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:22,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:22,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:22,932 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 13 treesize of output 9 [2021-02-19 17:49:22,935 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:49:22,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:22,940 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 [2021-02-19 17:49:22,943 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:49:22,982 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:22,984 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:49:22,984 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-02-19 17:49:23,144 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:23,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:49:23,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-02-19 17:49:23,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038907504] [2021-02-19 17:49:23,144 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 17:49:23,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:49:23,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 17:49:23,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:49:23,145 INFO L87 Difference]: Start difference. First operand 140 states and 303 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) [2021-02-19 17:49:24,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:49:24,221 INFO L93 Difference]: Finished difference Result 169 states and 363 transitions. [2021-02-19 17:49:24,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:49:24,223 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 [2021-02-19 17:49:24,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:49:24,223 INFO L225 Difference]: With dead ends: 169 [2021-02-19 17:49:24,223 INFO L226 Difference]: Without dead ends: 160 [2021-02-19 17:49:24,223 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:49:24,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-02-19 17:49:24,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 141. [2021-02-19 17:49:24,225 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) [2021-02-19 17:49:24,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 306 transitions. [2021-02-19 17:49:24,225 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 306 transitions. Word has length 18 [2021-02-19 17:49:24,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:49:24,225 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 306 transitions. [2021-02-19 17:49:24,225 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) [2021-02-19 17:49:24,225 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 306 transitions. [2021-02-19 17:49:24,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:49:24,225 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:49:24,225 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:49:24,426 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1341 [2021-02-19 17:49:24,426 INFO L428 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:49:24,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:49:24,426 INFO L82 PathProgramCache]: Analyzing trace with hash 2054625355, now seen corresponding path program 261 times [2021-02-19 17:49:24,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:49:24,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098918196] [2021-02-19 17:49:24,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:49:24,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:49:24,738 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:24,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098918196] [2021-02-19 17:49:24,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656777870] [2021-02-19 17:49:24,738 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 [2021-02-19 17:49:24,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:49:24,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:49:24,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-02-19 17:49:24,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:49:24,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:24,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:24,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:49:24,888 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:24,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:24,893 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 [2021-02-19 17:49:24,894 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:24,939 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:24,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:24,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:24,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:49:24,947 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:49:24,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:24,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:49:24,955 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:49:24,988 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:24,990 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:49:24,991 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:71, output treesize:29 [2021-02-19 17:49:25,106 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:25,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:49:25,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-02-19 17:49:25,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758908483] [2021-02-19 17:49:25,106 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 17:49:25,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:49:25,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 17:49:25,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:49:25,107 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) [2021-02-19 17:49:26,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:49:26,063 INFO L93 Difference]: Finished difference Result 170 states and 360 transitions. [2021-02-19 17:49:26,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:49:26,064 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 [2021-02-19 17:49:26,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:49:26,064 INFO L225 Difference]: With dead ends: 170 [2021-02-19 17:49:26,064 INFO L226 Difference]: Without dead ends: 154 [2021-02-19 17:49:26,064 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2021-02-19 17:49:26,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-02-19 17:49:26,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 142. [2021-02-19 17:49:26,066 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) [2021-02-19 17:49:26,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 308 transitions. [2021-02-19 17:49:26,066 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 308 transitions. Word has length 18 [2021-02-19 17:49:26,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:49:26,066 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 308 transitions. [2021-02-19 17:49:26,066 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) [2021-02-19 17:49:26,066 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 308 transitions. [2021-02-19 17:49:26,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:49:26,066 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:49:26,066 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:49:26,267 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1344,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:49:26,267 INFO L428 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:49:26,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:49:26,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1305689461, now seen corresponding path program 262 times [2021-02-19 17:49:26,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:49:26,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616317922] [2021-02-19 17:49:26,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:49:26,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:49:26,682 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:26,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616317922] [2021-02-19 17:49:26,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384605724] [2021-02-19 17:49:26,682 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 [2021-02-19 17:49:26,700 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:49:26,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:49:26,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:49:26,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:49:26,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:26,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:26,852 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 27 treesize of output 21 [2021-02-19 17:49:26,853 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:26,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:26,856 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 27 treesize of output 21 [2021-02-19 17:49:26,857 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:26,883 INFO L628 ElimStorePlain]: treesize reduction 36, result has 47.8 percent of original size [2021-02-19 17:49:26,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:26,886 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 21 treesize of output 13 [2021-02-19 17:49:26,886 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:26,894 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:26,895 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:49:26,895 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-02-19 17:49:26,967 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:26,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:49:26,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-02-19 17:49:26,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864614192] [2021-02-19 17:49:26,967 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 17:49:26,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:49:26,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 17:49:26,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:49:26,968 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) [2021-02-19 17:49:27,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:49:27,831 INFO L93 Difference]: Finished difference Result 162 states and 340 transitions. [2021-02-19 17:49:27,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:49:27,833 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 [2021-02-19 17:49:27,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:49:27,833 INFO L225 Difference]: With dead ends: 162 [2021-02-19 17:49:27,833 INFO L226 Difference]: Without dead ends: 149 [2021-02-19 17:49:27,833 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:49:27,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-02-19 17:49:27,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 143. [2021-02-19 17:49:27,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.183098591549296) internal successors, (310), 142 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) [2021-02-19 17:49:27,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 310 transitions. [2021-02-19 17:49:27,835 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 310 transitions. Word has length 18 [2021-02-19 17:49:27,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:49:27,835 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 310 transitions. [2021-02-19 17:49:27,835 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) [2021-02-19 17:49:27,835 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 310 transitions. [2021-02-19 17:49:27,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:49:27,835 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:49:27,835 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:49:28,036 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1347 [2021-02-19 17:49:28,036 INFO L428 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:49:28,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:49:28,036 INFO L82 PathProgramCache]: Analyzing trace with hash 1697172235, now seen corresponding path program 263 times [2021-02-19 17:49:28,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:49:28,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496061929] [2021-02-19 17:49:28,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:49:28,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:49:28,319 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:28,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496061929] [2021-02-19 17:49:28,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981085083] [2021-02-19 17:49:28,320 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 [2021-02-19 17:49:28,338 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 17:49:28,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:49:28,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:49:28,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:49:28,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:28,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:28,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:49:28,558 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:28,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:28,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:28,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:49:28,566 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:28,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:28,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:28,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:49:28,573 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:28,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:28,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:49:28,580 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:28,696 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-02-19 17:49:28,696 INFO L628 ElimStorePlain]: treesize reduction 80, result has 45.6 percent of original size [2021-02-19 17:49:28,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:28,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:28,702 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 10 treesize of output 6 [2021-02-19 17:49:28,705 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:49:28,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:28,710 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 13 treesize of output 9 [2021-02-19 17:49:28,713 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:49:28,761 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:28,763 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:49:28,763 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-02-19 17:49:28,939 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:28,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:49:28,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-02-19 17:49:28,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766350548] [2021-02-19 17:49:28,940 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 17:49:28,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:49:28,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 17:49:28,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:49:28,940 INFO L87 Difference]: Start difference. First operand 143 states and 310 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) [2021-02-19 17:49:29,934 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 28 [2021-02-19 17:49:30,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:49:30,001 INFO L93 Difference]: Finished difference Result 196 states and 398 transitions. [2021-02-19 17:49:30,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:49:30,002 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 [2021-02-19 17:49:30,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:49:30,003 INFO L225 Difference]: With dead ends: 196 [2021-02-19 17:49:30,003 INFO L226 Difference]: Without dead ends: 174 [2021-02-19 17:49:30,003 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2021-02-19 17:49:30,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-02-19 17:49:30,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 140. [2021-02-19 17:49:30,004 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) [2021-02-19 17:49:30,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 304 transitions. [2021-02-19 17:49:30,004 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 304 transitions. Word has length 18 [2021-02-19 17:49:30,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:49:30,005 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 304 transitions. [2021-02-19 17:49:30,005 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) [2021-02-19 17:49:30,005 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 304 transitions. [2021-02-19 17:49:30,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:49:30,005 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:49:30,005 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:49:30,205 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1348 [2021-02-19 17:49:30,205 INFO L428 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:49:30,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:49:30,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1893434783, now seen corresponding path program 264 times [2021-02-19 17:49:30,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:49:30,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84116806] [2021-02-19 17:49:30,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:49:30,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:49:30,460 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:30,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84116806] [2021-02-19 17:49:30,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972979441] [2021-02-19 17:49:30,460 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 [2021-02-19 17:49:30,479 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:49:30,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:49:30,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:49:30,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:49:30,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:30,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:30,738 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 27 treesize of output 21 [2021-02-19 17:49:30,740 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:30,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:30,745 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 27 treesize of output 21 [2021-02-19 17:49:30,747 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:30,797 INFO L628 ElimStorePlain]: treesize reduction 48, result has 36.0 percent of original size [2021-02-19 17:49:30,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:30,801 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 [2021-02-19 17:49:30,803 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:49:30,817 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:30,818 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:49:30,819 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-02-19 17:49:30,903 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:30,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:49:30,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-02-19 17:49:30,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054608973] [2021-02-19 17:49:30,903 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 17:49:30,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:49:30,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 17:49:30,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:49:30,904 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) [2021-02-19 17:49:31,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:49:31,463 INFO L93 Difference]: Finished difference Result 160 states and 336 transitions. [2021-02-19 17:49:31,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:49:31,465 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 [2021-02-19 17:49:31,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:49:31,465 INFO L225 Difference]: With dead ends: 160 [2021-02-19 17:49:31,465 INFO L226 Difference]: Without dead ends: 147 [2021-02-19 17:49:31,465 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:49:31,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-02-19 17:49:31,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 142. [2021-02-19 17:49:31,467 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) [2021-02-19 17:49:31,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 308 transitions. [2021-02-19 17:49:31,467 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 308 transitions. Word has length 18 [2021-02-19 17:49:31,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:49:31,467 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 308 transitions. [2021-02-19 17:49:31,467 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) [2021-02-19 17:49:31,467 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 308 transitions. [2021-02-19 17:49:31,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:49:31,467 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:49:31,467 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:49:31,668 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1351,265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:49:31,668 INFO L428 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:49:31,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:49:31,668 INFO L82 PathProgramCache]: Analyzing trace with hash -2010049739, now seen corresponding path program 265 times [2021-02-19 17:49:31,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:49:31,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391121230] [2021-02-19 17:49:31,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:49:31,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:49:32,105 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:32,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391121230] [2021-02-19 17:49:32,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882361989] [2021-02-19 17:49:32,106 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 [2021-02-19 17:49:32,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:49:32,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:49:32,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:49:32,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:32,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:32,333 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 [2021-02-19 17:49:32,335 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:32,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:32,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:32,341 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 [2021-02-19 17:49:32,343 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:32,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:32,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:32,349 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 [2021-02-19 17:49:32,351 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:32,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:32,356 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 [2021-02-19 17:49:32,358 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:32,474 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-02-19 17:49:32,475 INFO L628 ElimStorePlain]: treesize reduction 77, result has 46.5 percent of original size [2021-02-19 17:49:32,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:32,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:32,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:49:32,484 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:49:32,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:32,489 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 13 treesize of output 9 [2021-02-19 17:49:32,492 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:49:32,539 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:32,541 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:49:32,541 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-02-19 17:49:32,650 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:32,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:49:32,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-02-19 17:49:32,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098558487] [2021-02-19 17:49:32,650 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 17:49:32,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:49:32,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 17:49:32,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:49:32,651 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) [2021-02-19 17:49:33,511 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 28 [2021-02-19 17:49:33,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:49:33,579 INFO L93 Difference]: Finished difference Result 188 states and 385 transitions. [2021-02-19 17:49:33,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:49:33,580 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 [2021-02-19 17:49:33,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:49:33,580 INFO L225 Difference]: With dead ends: 188 [2021-02-19 17:49:33,580 INFO L226 Difference]: Without dead ends: 169 [2021-02-19 17:49:33,581 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:49:33,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-02-19 17:49:33,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 138. [2021-02-19 17:49:33,582 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) [2021-02-19 17:49:33,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 300 transitions. [2021-02-19 17:49:33,582 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 300 transitions. Word has length 18 [2021-02-19 17:49:33,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:49:33,582 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 300 transitions. [2021-02-19 17:49:33,582 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) [2021-02-19 17:49:33,582 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 300 transitions. [2021-02-19 17:49:33,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:49:33,582 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:49:33,583 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:49:33,783 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1352 [2021-02-19 17:49:33,783 INFO L428 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:49:33,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:49:33,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1749687755, now seen corresponding path program 266 times [2021-02-19 17:49:33,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:49:33,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939275030] [2021-02-19 17:49:33,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:49:33,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:49:34,162 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:34,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939275030] [2021-02-19 17:49:34,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653614656] [2021-02-19 17:49:34,163 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 [2021-02-19 17:49:34,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:49:34,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:49:34,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-02-19 17:49:34,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:49:34,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:34,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:34,383 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 19 treesize of output 15 [2021-02-19 17:49:34,385 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:34,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:34,389 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 19 treesize of output 15 [2021-02-19 17:49:34,391 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:34,436 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:34,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:34,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:34,441 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 13 treesize of output 9 [2021-02-19 17:49:34,444 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:49:34,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:34,449 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 10 treesize of output 6 [2021-02-19 17:49:34,452 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:49:34,497 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:34,500 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:49:34,500 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-02-19 17:49:34,656 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:34,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:49:34,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-02-19 17:49:34,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884132657] [2021-02-19 17:49:34,656 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:49:34,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:49:34,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:49:34,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:49:34,657 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) [2021-02-19 17:49:35,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:49:35,656 INFO L93 Difference]: Finished difference Result 174 states and 374 transitions. [2021-02-19 17:49:35,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:49:35,657 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 [2021-02-19 17:49:35,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:49:35,657 INFO L225 Difference]: With dead ends: 174 [2021-02-19 17:49:35,657 INFO L226 Difference]: Without dead ends: 165 [2021-02-19 17:49:35,657 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:49:35,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-02-19 17:49:35,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 138. [2021-02-19 17:49:35,659 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) [2021-02-19 17:49:35,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 300 transitions. [2021-02-19 17:49:35,659 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 300 transitions. Word has length 18 [2021-02-19 17:49:35,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:49:35,659 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 300 transitions. [2021-02-19 17:49:35,659 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) [2021-02-19 17:49:35,659 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 300 transitions. [2021-02-19 17:49:35,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:49:35,659 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:49:35,659 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:49:35,859 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 267 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1355 [2021-02-19 17:49:35,860 INFO L428 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:49:35,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:49:35,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1361296715, now seen corresponding path program 267 times [2021-02-19 17:49:35,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:49:35,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536796124] [2021-02-19 17:49:35,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:49:35,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:49:36,150 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:36,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536796124] [2021-02-19 17:49:36,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652496480] [2021-02-19 17:49:36,150 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 [2021-02-19 17:49:36,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:49:36,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:49:36,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:49:36,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:49:36,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:36,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:36,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:49:36,403 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:36,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:36,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:49:36,410 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:36,460 INFO L628 ElimStorePlain]: treesize reduction 42, result has 39.1 percent of original size [2021-02-19 17:49:36,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:36,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:49:36,469 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:49:36,483 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:36,485 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:49:36,485 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-02-19 17:49:36,555 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:36,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:49:36,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-02-19 17:49:36,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609222009] [2021-02-19 17:49:36,555 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:49:36,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:49:36,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:49:36,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:49:36,556 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) [2021-02-19 17:49:37,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:49:37,198 INFO L93 Difference]: Finished difference Result 159 states and 334 transitions. [2021-02-19 17:49:37,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:49:37,199 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 [2021-02-19 17:49:37,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:49:37,199 INFO L225 Difference]: With dead ends: 159 [2021-02-19 17:49:37,199 INFO L226 Difference]: Without dead ends: 146 [2021-02-19 17:49:37,200 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:49:37,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-02-19 17:49:37,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 141. [2021-02-19 17:49:37,201 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) [2021-02-19 17:49:37,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 306 transitions. [2021-02-19 17:49:37,201 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 306 transitions. Word has length 18 [2021-02-19 17:49:37,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:49:37,201 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 306 transitions. [2021-02-19 17:49:37,201 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) [2021-02-19 17:49:37,201 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 306 transitions. [2021-02-19 17:49:37,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:49:37,202 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:49:37,202 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:49:37,402 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1358 [2021-02-19 17:49:37,402 INFO L428 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:49:37,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:49:37,402 INFO L82 PathProgramCache]: Analyzing trace with hash -969813941, now seen corresponding path program 268 times [2021-02-19 17:49:37,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:49:37,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475609442] [2021-02-19 17:49:37,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:49:37,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:49:37,854 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:37,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475609442] [2021-02-19 17:49:37,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500533011] [2021-02-19 17:49:37,855 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 [2021-02-19 17:49:37,873 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:49:37,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:49:37,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:49:37,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:49:38,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:38,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:38,079 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 [2021-02-19 17:49:38,081 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:38,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:38,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:38,089 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 [2021-02-19 17:49:38,091 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:38,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:38,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:38,098 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 19 treesize of output 15 [2021-02-19 17:49:38,100 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:38,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:38,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:49:38,108 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:38,232 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-02-19 17:49:38,233 INFO L628 ElimStorePlain]: treesize reduction 80, result has 45.6 percent of original size [2021-02-19 17:49:38,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:38,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:38,239 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 13 treesize of output 9 [2021-02-19 17:49:38,242 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:49:38,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:38,247 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 10 treesize of output 6 [2021-02-19 17:49:38,250 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:49:38,299 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:38,301 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:49:38,301 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-02-19 17:49:38,436 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:38,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:49:38,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-02-19 17:49:38,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139033402] [2021-02-19 17:49:38,437 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 17:49:38,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:49:38,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 17:49:38,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:49:38,437 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) [2021-02-19 17:49:39,364 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 28 [2021-02-19 17:49:39,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:49:39,427 INFO L93 Difference]: Finished difference Result 187 states and 383 transitions. [2021-02-19 17:49:39,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:49:39,428 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 [2021-02-19 17:49:39,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:49:39,429 INFO L225 Difference]: With dead ends: 187 [2021-02-19 17:49:39,429 INFO L226 Difference]: Without dead ends: 168 [2021-02-19 17:49:39,429 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2021-02-19 17:49:39,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-02-19 17:49:39,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 140. [2021-02-19 17:49:39,431 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) [2021-02-19 17:49:39,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 304 transitions. [2021-02-19 17:49:39,431 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 304 transitions. Word has length 18 [2021-02-19 17:49:39,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:49:39,431 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 304 transitions. [2021-02-19 17:49:39,431 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) [2021-02-19 17:49:39,431 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 304 transitions. [2021-02-19 17:49:39,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:49:39,431 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:49:39,431 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:49:39,632 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1359 [2021-02-19 17:49:39,632 INFO L428 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:49:39,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:49:39,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1505043743, now seen corresponding path program 269 times [2021-02-19 17:49:39,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:49:39,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296577669] [2021-02-19 17:49:39,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:49:39,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:49:39,944 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:39,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296577669] [2021-02-19 17:49:39,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311478573] [2021-02-19 17:49:39,944 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 [2021-02-19 17:49:39,963 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 17:49:39,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:49:39,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:49:39,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:49:40,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:40,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:40,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:49:40,210 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:40,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:40,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:49:40,218 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:40,367 WARN L202 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2021-02-19 17:49:40,368 INFO L628 ElimStorePlain]: treesize reduction 85, result has 46.9 percent of original size [2021-02-19 17:49:40,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:40,373 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 13 treesize of output 9 [2021-02-19 17:49:40,376 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:49:40,431 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:40,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:40,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:49:40,439 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:40,491 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:40,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:40,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:49:40,500 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:49:40,544 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:40,549 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:49:40,549 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-02-19 17:49:40,714 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:40,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:49:40,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-02-19 17:49:40,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924838788] [2021-02-19 17:49:40,714 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:49:40,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:49:40,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:49:40,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:49:40,715 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) [2021-02-19 17:49:41,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:49:41,570 INFO L93 Difference]: Finished difference Result 174 states and 366 transitions. [2021-02-19 17:49:41,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:49:41,571 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 [2021-02-19 17:49:41,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:49:41,571 INFO L225 Difference]: With dead ends: 174 [2021-02-19 17:49:41,571 INFO L226 Difference]: Without dead ends: 159 [2021-02-19 17:49:41,572 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:49:41,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-02-19 17:49:41,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 137. [2021-02-19 17:49:41,573 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) [2021-02-19 17:49:41,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 296 transitions. [2021-02-19 17:49:41,574 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 296 transitions. Word has length 18 [2021-02-19 17:49:41,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:49:41,574 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 296 transitions. [2021-02-19 17:49:41,574 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) [2021-02-19 17:49:41,574 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 296 transitions. [2021-02-19 17:49:41,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:49:41,574 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:49:41,574 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:49:41,791 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1362,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:49:41,791 INFO L428 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:49:41,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:49:41,791 INFO L82 PathProgramCache]: Analyzing trace with hash -917298421, now seen corresponding path program 270 times [2021-02-19 17:49:41,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:49:41,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90355260] [2021-02-19 17:49:41,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:49:41,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:49:42,101 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:42,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90355260] [2021-02-19 17:49:42,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839760763] [2021-02-19 17:49:42,101 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 [2021-02-19 17:49:42,120 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:49:42,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:49:42,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-02-19 17:49:42,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:49:42,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:42,440 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 19 treesize of output 15 [2021-02-19 17:49:42,442 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:42,492 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:42,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:42,497 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 19 treesize of output 15 [2021-02-19 17:49:42,500 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:42,546 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:42,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:42,551 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 13 treesize of output 9 [2021-02-19 17:49:42,554 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:49:42,597 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:42,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:42,603 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 10 treesize of output 6 [2021-02-19 17:49:42,605 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:49:42,647 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:42,649 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:49:42,649 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:35 [2021-02-19 17:49:42,831 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:42,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:49:42,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-02-19 17:49:42,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509231699] [2021-02-19 17:49:42,832 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 17:49:42,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:49:42,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 17:49:42,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:49:42,833 INFO L87 Difference]: Start difference. First operand 137 states and 296 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) [2021-02-19 17:49:43,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:49:43,688 INFO L93 Difference]: Finished difference Result 186 states and 386 transitions. [2021-02-19 17:49:43,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:49:43,689 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 [2021-02-19 17:49:43,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:49:43,689 INFO L225 Difference]: With dead ends: 186 [2021-02-19 17:49:43,690 INFO L226 Difference]: Without dead ends: 172 [2021-02-19 17:49:43,690 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:49:43,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-02-19 17:49:43,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 137. [2021-02-19 17:49:43,691 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) [2021-02-19 17:49:43,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 296 transitions. [2021-02-19 17:49:43,691 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 296 transitions. Word has length 18 [2021-02-19 17:49:43,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:49:43,692 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 296 transitions. [2021-02-19 17:49:43,692 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) [2021-02-19 17:49:43,692 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 296 transitions. [2021-02-19 17:49:43,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:49:43,692 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:49:43,692 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:49:43,892 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1367 [2021-02-19 17:49:43,892 INFO L428 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:49:43,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:49:43,893 INFO L82 PathProgramCache]: Analyzing trace with hash 821241951, now seen corresponding path program 271 times [2021-02-19 17:49:43,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:49:43,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72876127] [2021-02-19 17:49:43,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:49:43,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:49:44,244 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:44,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72876127] [2021-02-19 17:49:44,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485486554] [2021-02-19 17:49:44,245 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 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 [2021-02-19 17:49:44,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:49:44,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:49:44,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:49:44,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:44,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:44,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:49:44,521 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:44,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:44,526 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 27 treesize of output 21 [2021-02-19 17:49:44,528 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:44,570 INFO L628 ElimStorePlain]: treesize reduction 36, result has 42.9 percent of original size [2021-02-19 17:49:44,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:44,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:49:44,577 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:49:44,590 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:44,592 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:49:44,592 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-02-19 17:49:44,677 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:44,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:49:44,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-02-19 17:49:44,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858293535] [2021-02-19 17:49:44,678 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 17:49:44,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:49:44,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 17:49:44,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:49:44,679 INFO L87 Difference]: Start difference. First operand 137 states and 296 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) [2021-02-19 17:49:45,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:49:45,425 INFO L93 Difference]: Finished difference Result 164 states and 345 transitions. [2021-02-19 17:49:45,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:49:45,427 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 [2021-02-19 17:49:45,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:49:45,427 INFO L225 Difference]: With dead ends: 164 [2021-02-19 17:49:45,427 INFO L226 Difference]: Without dead ends: 151 [2021-02-19 17:49:45,427 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:49:45,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-02-19 17:49:45,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 141. [2021-02-19 17:49:45,429 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) [2021-02-19 17:49:45,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 304 transitions. [2021-02-19 17:49:45,429 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 304 transitions. Word has length 18 [2021-02-19 17:49:45,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:49:45,429 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 304 transitions. [2021-02-19 17:49:45,429 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) [2021-02-19 17:49:45,429 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 304 transitions. [2021-02-19 17:49:45,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:49:45,429 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:49:45,429 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:49:45,630 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 272 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1374 [2021-02-19 17:49:45,630 INFO L428 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:49:45,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:49:45,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1212724725, now seen corresponding path program 272 times [2021-02-19 17:49:45,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:49:45,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825037598] [2021-02-19 17:49:45,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:49:45,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:49:46,042 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:46,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825037598] [2021-02-19 17:49:46,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915353734] [2021-02-19 17:49:46,043 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 [2021-02-19 17:49:46,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:49:46,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:49:46,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-02-19 17:49:46,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:49:46,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:46,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:46,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:49:46,281 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:46,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:46,287 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 19 treesize of output 15 [2021-02-19 17:49:46,288 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:46,344 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:46,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:46,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:46,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:49:46,354 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:49:46,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:46,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:49:46,363 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:49:46,407 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:46,409 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:49:46,409 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-02-19 17:49:46,583 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:46,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:49:46,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-02-19 17:49:46,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054521001] [2021-02-19 17:49:46,584 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 17:49:46,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:49:46,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 17:49:46,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:49:46,584 INFO L87 Difference]: Start difference. First operand 141 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) [2021-02-19 17:49:47,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:49:47,729 INFO L93 Difference]: Finished difference Result 166 states and 355 transitions. [2021-02-19 17:49:47,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:49:47,730 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 [2021-02-19 17:49:47,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:49:47,730 INFO L225 Difference]: With dead ends: 166 [2021-02-19 17:49:47,730 INFO L226 Difference]: Without dead ends: 157 [2021-02-19 17:49:47,731 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:49:47,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-02-19 17:49:47,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 140. [2021-02-19 17:49:47,732 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) [2021-02-19 17:49:47,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 302 transitions. [2021-02-19 17:49:47,732 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 302 transitions. Word has length 18 [2021-02-19 17:49:47,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:49:47,732 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 302 transitions. [2021-02-19 17:49:47,732 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) [2021-02-19 17:49:47,732 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 302 transitions. [2021-02-19 17:49:47,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:49:47,733 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:49:47,733 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:49:47,949 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1375 [2021-02-19 17:49:47,949 INFO L428 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:49:47,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:49:47,949 INFO L82 PathProgramCache]: Analyzing trace with hash 677494923, now seen corresponding path program 273 times [2021-02-19 17:49:47,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:49:47,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703907697] [2021-02-19 17:49:47,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:49:47,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:49:48,146 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:48,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703907697] [2021-02-19 17:49:48,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605697044] [2021-02-19 17:49:48,146 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 [2021-02-19 17:49:48,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:49:48,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:49:48,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-02-19 17:49:48,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:49:48,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:48,369 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 [2021-02-19 17:49:48,371 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:48,417 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:48,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:48,422 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 [2021-02-19 17:49:48,424 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:48,457 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:48,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:48,460 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 13 treesize of output 9 [2021-02-19 17:49:48,462 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:49:48,510 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:48,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:48,516 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 13 treesize of output 9 [2021-02-19 17:49:48,519 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:49:48,559 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:48,561 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:49:48,561 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:35 [2021-02-19 17:49:48,753 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:48,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:49:48,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-02-19 17:49:48,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354190362] [2021-02-19 17:49:48,753 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:49:48,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:49:48,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:49:48,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:49:48,754 INFO L87 Difference]: Start difference. First operand 140 states and 302 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) [2021-02-19 17:49:49,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:49:49,672 INFO L93 Difference]: Finished difference Result 184 states and 384 transitions. [2021-02-19 17:49:49,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:49:49,674 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 [2021-02-19 17:49:49,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:49:49,674 INFO L225 Difference]: With dead ends: 184 [2021-02-19 17:49:49,674 INFO L226 Difference]: Without dead ends: 170 [2021-02-19 17:49:49,674 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:49:49,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-02-19 17:49:49,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 140. [2021-02-19 17:49:49,676 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) [2021-02-19 17:49:49,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 302 transitions. [2021-02-19 17:49:49,676 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 302 transitions. Word has length 18 [2021-02-19 17:49:49,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:49:49,676 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 302 transitions. [2021-02-19 17:49:49,676 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) [2021-02-19 17:49:49,676 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 302 transitions. [2021-02-19 17:49:49,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:49:49,676 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:49:49,677 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:49:49,877 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1378,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:49:49,877 INFO L428 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:49:49,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:49:49,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1265240245, now seen corresponding path program 274 times [2021-02-19 17:49:49,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:49:49,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094035779] [2021-02-19 17:49:49,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:49:49,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:49:50,273 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:50,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094035779] [2021-02-19 17:49:50,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732068047] [2021-02-19 17:49:50,273 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 [2021-02-19 17:49:50,291 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:49:50,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:49:50,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:49:50,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:49:50,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:50,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:50,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:49:50,559 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:50,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:50,566 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 19 treesize of output 15 [2021-02-19 17:49:50,569 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:50,747 WARN L202 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-02-19 17:49:50,748 INFO L628 ElimStorePlain]: treesize reduction 88, result has 46.0 percent of original size [2021-02-19 17:49:50,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:50,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:49:50,757 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:49:50,805 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:50,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:50,808 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 19 treesize of output 15 [2021-02-19 17:49:50,809 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:50,861 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:50,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:50,866 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 10 treesize of output 6 [2021-02-19 17:49:50,869 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:49:50,913 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:50,915 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:49:50,915 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-02-19 17:49:51,099 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:51,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:49:51,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-02-19 17:49:51,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637520983] [2021-02-19 17:49:51,100 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 17:49:51,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:49:51,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 17:49:51,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:49:51,100 INFO L87 Difference]: Start difference. First operand 140 states and 302 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) [2021-02-19 17:49:51,633 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2021-02-19 17:49:52,040 WARN L202 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2021-02-19 17:49:52,331 WARN L202 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2021-02-19 17:49:52,559 WARN L202 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 46 [2021-02-19 17:49:52,779 WARN L202 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-02-19 17:49:52,962 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-02-19 17:49:53,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:49:53,009 INFO L93 Difference]: Finished difference Result 232 states and 462 transitions. [2021-02-19 17:49:53,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:49:53,011 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 [2021-02-19 17:49:53,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:49:53,011 INFO L225 Difference]: With dead ends: 232 [2021-02-19 17:49:53,011 INFO L226 Difference]: Without dead ends: 199 [2021-02-19 17:49:53,011 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2021-02-19 17:49:53,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-02-19 17:49:53,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 140. [2021-02-19 17:49:53,013 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) [2021-02-19 17:49:53,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 302 transitions. [2021-02-19 17:49:53,013 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 302 transitions. Word has length 18 [2021-02-19 17:49:53,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:49:53,013 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 302 transitions. [2021-02-19 17:49:53,013 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) [2021-02-19 17:49:53,013 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 302 transitions. [2021-02-19 17:49:53,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:49:53,014 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:49:53,014 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:49:53,214 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 275 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1385 [2021-02-19 17:49:53,214 INFO L428 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:49:53,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:49:53,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1989491253, now seen corresponding path program 275 times [2021-02-19 17:49:53,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:49:53,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264144073] [2021-02-19 17:49:53,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:49:53,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:49:53,665 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:53,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264144073] [2021-02-19 17:49:53,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881904972] [2021-02-19 17:49:53,665 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 [2021-02-19 17:49:53,683 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 17:49:53,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:49:53,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:49:53,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:49:53,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:53,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:53,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:49:53,905 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:53,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:53,911 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 19 treesize of output 15 [2021-02-19 17:49:53,913 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:54,068 WARN L202 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2021-02-19 17:49:54,068 INFO L628 ElimStorePlain]: treesize reduction 85, result has 45.9 percent of original size [2021-02-19 17:49:54,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:54,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:49:54,077 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:49:54,135 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:54,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:54,140 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 19 treesize of output 15 [2021-02-19 17:49:54,142 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:54,192 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:54,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:54,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:49:54,200 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:49:54,237 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:54,238 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:49:54,238 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-02-19 17:49:54,427 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:54,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:49:54,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-02-19 17:49:54,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300007349] [2021-02-19 17:49:54,427 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 17:49:54,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:49:54,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 17:49:54,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:49:54,428 INFO L87 Difference]: Start difference. First operand 140 states and 302 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) [2021-02-19 17:49:55,368 WARN L202 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-02-19 17:49:55,681 WARN L202 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 45 [2021-02-19 17:49:55,921 WARN L202 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2021-02-19 17:49:56,122 WARN L202 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2021-02-19 17:49:56,287 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2021-02-19 17:49:56,473 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2021-02-19 17:49:56,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:49:56,653 INFO L93 Difference]: Finished difference Result 257 states and 507 transitions. [2021-02-19 17:49:56,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 17:49:56,654 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 [2021-02-19 17:49:56,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:49:56,654 INFO L225 Difference]: With dead ends: 257 [2021-02-19 17:49:56,654 INFO L226 Difference]: Without dead ends: 217 [2021-02-19 17:49:56,654 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=135, Invalid=735, Unknown=0, NotChecked=0, Total=870 [2021-02-19 17:49:56,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-02-19 17:49:56,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 145. [2021-02-19 17:49:56,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.201388888888889) internal successors, (317), 144 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:49:56,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 317 transitions. [2021-02-19 17:49:56,656 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 317 transitions. Word has length 18 [2021-02-19 17:49:56,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:49:56,656 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 317 transitions. [2021-02-19 17:49:56,656 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) [2021-02-19 17:49:56,656 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 317 transitions. [2021-02-19 17:49:56,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:49:56,656 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:49:56,656 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:49:56,857 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1390 [2021-02-19 17:49:56,857 INFO L428 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:49:56,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:49:56,857 INFO L82 PathProgramCache]: Analyzing trace with hash -451691757, now seen corresponding path program 276 times [2021-02-19 17:49:56,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:49:56,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179532629] [2021-02-19 17:49:56,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:49:56,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:49:57,050 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:57,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179532629] [2021-02-19 17:49:57,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020656599] [2021-02-19 17:49:57,051 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 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 [2021-02-19 17:49:57,070 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 17:49:57,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:49:57,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-02-19 17:49:57,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:49:57,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:57,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:57,300 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 [2021-02-19 17:49:57,302 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:57,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:57,308 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 19 treesize of output 15 [2021-02-19 17:49:57,310 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:57,336 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:57,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:57,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:57,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:49:57,346 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:49:57,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:57,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:49:57,355 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:49:57,395 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:57,397 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:49:57,397 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:71, output treesize:29 [2021-02-19 17:49:57,511 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:57,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:49:57,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-02-19 17:49:57,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557133671] [2021-02-19 17:49:57,511 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:49:57,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:49:57,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:49:57,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:49:57,512 INFO L87 Difference]: Start difference. First operand 145 states and 317 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) [2021-02-19 17:49:58,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:49:58,634 INFO L93 Difference]: Finished difference Result 174 states and 370 transitions. [2021-02-19 17:49:58,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:49:58,636 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 [2021-02-19 17:49:58,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:49:58,637 INFO L225 Difference]: With dead ends: 174 [2021-02-19 17:49:58,637 INFO L226 Difference]: Without dead ends: 161 [2021-02-19 17:49:58,637 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2021-02-19 17:49:58,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-02-19 17:49:58,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 146. [2021-02-19 17:49:58,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.2) internal successors, (319), 145 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:49:58,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 319 transitions. [2021-02-19 17:49:58,639 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 319 transitions. Word has length 18 [2021-02-19 17:49:58,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:49:58,639 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 319 transitions. [2021-02-19 17:49:58,639 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) [2021-02-19 17:49:58,639 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 319 transitions. [2021-02-19 17:49:58,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:49:58,639 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:49:58,639 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:49:58,840 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1395,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:49:58,840 INFO L428 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:49:58,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:49:58,840 INFO L82 PathProgramCache]: Analyzing trace with hash -60208983, now seen corresponding path program 277 times [2021-02-19 17:49:58,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:49:58,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084165379] [2021-02-19 17:49:58,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:49:58,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:49:59,231 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:59,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084165379] [2021-02-19 17:49:59,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291832355] [2021-02-19 17:49:59,232 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 [2021-02-19 17:49:59,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:49:59,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:49:59,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:49:59,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:59,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:59,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:49:59,446 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:59,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:59,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:59,452 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 19 treesize of output 15 [2021-02-19 17:49:59,454 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:59,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:59,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:59,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:49:59,463 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:59,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:59,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:49:59,469 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:59,587 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2021-02-19 17:49:59,587 INFO L628 ElimStorePlain]: treesize reduction 80, result has 45.6 percent of original size [2021-02-19 17:49:59,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:59,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:59,591 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 10 treesize of output 6 [2021-02-19 17:49:59,593 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:49:59,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:59,596 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 13 treesize of output 9 [2021-02-19 17:49:59,597 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:49:59,623 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:59,624 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:49:59,625 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-02-19 17:49:59,719 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:59,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:49:59,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-02-19 17:49:59,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876622734] [2021-02-19 17:49:59,719 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:49:59,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:49:59,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:49:59,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:49:59,720 INFO L87 Difference]: Start difference. First operand 146 states and 319 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) [2021-02-19 17:50:01,110 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-02-19 17:50:01,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:50:01,194 INFO L93 Difference]: Finished difference Result 201 states and 410 transitions. [2021-02-19 17:50:01,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 17:50:01,196 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 [2021-02-19 17:50:01,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:50:01,196 INFO L225 Difference]: With dead ends: 201 [2021-02-19 17:50:01,197 INFO L226 Difference]: Without dead ends: 179 [2021-02-19 17:50:01,197 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2021-02-19 17:50:01,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-02-19 17:50:01,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 143. [2021-02-19 17:50:01,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.204225352112676) internal successors, (313), 142 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) [2021-02-19 17:50:01,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 313 transitions. [2021-02-19 17:50:01,199 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 313 transitions. Word has length 18 [2021-02-19 17:50:01,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:50:01,199 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 313 transitions. [2021-02-19 17:50:01,199 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) [2021-02-19 17:50:01,199 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 313 transitions. [2021-02-19 17:50:01,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:50:01,199 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:50:01,199 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:50:01,400 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1398 [2021-02-19 17:50:01,400 INFO L428 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:50:01,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:50:01,400 INFO L82 PathProgramCache]: Analyzing trace with hash -595438785, now seen corresponding path program 278 times [2021-02-19 17:50:01,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:50:01,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104964712] [2021-02-19 17:50:01,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:50:01,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:50:01,898 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:01,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104964712] [2021-02-19 17:50:01,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493123883] [2021-02-19 17:50:01,899 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 [2021-02-19 17:50:01,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:50:01,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:50:01,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-02-19 17:50:01,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:50:02,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:02,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:02,124 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 [2021-02-19 17:50:02,127 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:02,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:02,133 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 19 treesize of output 15 [2021-02-19 17:50:02,136 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:02,196 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:02,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:02,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:02,203 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 13 treesize of output 9 [2021-02-19 17:50:02,207 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:50:02,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:02,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:50:02,218 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:50:02,271 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:02,273 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:50:02,274 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-02-19 17:50:02,386 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:02,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:50:02,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-02-19 17:50:02,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575289834] [2021-02-19 17:50:02,386 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:50:02,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:50:02,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:50:02,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:50:02,387 INFO L87 Difference]: Start difference. First operand 143 states and 313 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) [2021-02-19 17:50:02,738 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2021-02-19 17:50:03,164 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 31 [2021-02-19 17:50:03,487 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 26 [2021-02-19 17:50:03,707 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2021-02-19 17:50:04,005 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2021-02-19 17:50:04,208 WARN L202 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-02-19 17:50:04,435 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-02-19 17:50:04,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:50:04,510 INFO L93 Difference]: Finished difference Result 237 states and 485 transitions. [2021-02-19 17:50:04,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 17:50:04,511 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 [2021-02-19 17:50:04,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:50:04,512 INFO L225 Difference]: With dead ends: 237 [2021-02-19 17:50:04,512 INFO L226 Difference]: Without dead ends: 212 [2021-02-19 17:50:04,512 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=131, Invalid=925, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 17:50:04,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-02-19 17:50:04,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 142. [2021-02-19 17:50:04,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.219858156028369) internal successors, (313), 141 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) [2021-02-19 17:50:04,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 313 transitions. [2021-02-19 17:50:04,514 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 313 transitions. Word has length 18 [2021-02-19 17:50:04,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:50:04,514 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 313 transitions. [2021-02-19 17:50:04,514 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) [2021-02-19 17:50:04,514 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 313 transitions. [2021-02-19 17:50:04,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:50:04,514 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:50:04,514 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:50:04,715 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1401,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:50:04,715 INFO L428 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:50:04,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:50:04,715 INFO L82 PathProgramCache]: Analyzing trace with hash -7693463, now seen corresponding path program 279 times [2021-02-19 17:50:04,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:50:04,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368559081] [2021-02-19 17:50:04,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:50:04,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:50:05,100 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:05,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368559081] [2021-02-19 17:50:05,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199982281] [2021-02-19 17:50:05,101 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 [2021-02-19 17:50:05,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:50:05,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:50:05,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-02-19 17:50:05,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:50:05,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:05,286 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 19 treesize of output 15 [2021-02-19 17:50:05,287 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:05,314 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:05,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:05,317 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 19 treesize of output 15 [2021-02-19 17:50:05,318 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:05,355 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:05,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:05,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:50:05,365 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:50:05,419 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:05,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:05,425 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 13 treesize of output 9 [2021-02-19 17:50:05,429 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:50:05,481 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:05,483 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:50:05,484 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:35 [2021-02-19 17:50:05,699 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:05,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:50:05,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-02-19 17:50:05,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028003624] [2021-02-19 17:50:05,699 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:50:05,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:50:05,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:50:05,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:50:05,700 INFO L87 Difference]: Start difference. First operand 142 states and 313 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) [2021-02-19 17:50:06,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:50:06,503 INFO L93 Difference]: Finished difference Result 187 states and 394 transitions. [2021-02-19 17:50:06,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:50:06,505 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 [2021-02-19 17:50:06,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:50:06,505 INFO L225 Difference]: With dead ends: 187 [2021-02-19 17:50:06,505 INFO L226 Difference]: Without dead ends: 173 [2021-02-19 17:50:06,505 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:50:06,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-02-19 17:50:06,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 142. [2021-02-19 17:50:06,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.219858156028369) internal successors, (313), 141 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) [2021-02-19 17:50:06,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 313 transitions. [2021-02-19 17:50:06,507 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 313 transitions. Word has length 18 [2021-02-19 17:50:06,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:50:06,507 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 313 transitions. [2021-02-19 17:50:06,507 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) [2021-02-19 17:50:06,507 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 313 transitions. [2021-02-19 17:50:06,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:50:06,507 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:50:06,507 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:50:06,708 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1404,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:50:06,708 INFO L428 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:50:06,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:50:06,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1032542335, now seen corresponding path program 280 times [2021-02-19 17:50:06,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:50:06,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226205836] [2021-02-19 17:50:06,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:50:06,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:50:07,100 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:07,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226205836] [2021-02-19 17:50:07,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021710955] [2021-02-19 17:50:07,100 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 [2021-02-19 17:50:07,118 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:50:07,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:50:07,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:50:07,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:50:07,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:07,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:07,439 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 [2021-02-19 17:50:07,440 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:07,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:07,443 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 [2021-02-19 17:50:07,444 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:07,521 INFO L628 ElimStorePlain]: treesize reduction 85, result has 46.9 percent of original size [2021-02-19 17:50:07,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:07,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:50:07,526 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:50:07,556 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:07,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:07,559 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 19 treesize of output 15 [2021-02-19 17:50:07,560 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:07,597 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:07,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:07,603 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 10 treesize of output 6 [2021-02-19 17:50:07,606 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:50:07,662 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:07,664 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:50:07,665 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-02-19 17:50:07,860 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:07,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:50:07,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-02-19 17:50:07,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422176345] [2021-02-19 17:50:07,861 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:50:07,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:50:07,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:50:07,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:50:07,861 INFO L87 Difference]: Start difference. First operand 142 states and 313 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) [2021-02-19 17:50:08,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:50:08,573 INFO L93 Difference]: Finished difference Result 177 states and 380 transitions. [2021-02-19 17:50:08,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:50:08,575 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 [2021-02-19 17:50:08,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:50:08,575 INFO L225 Difference]: With dead ends: 177 [2021-02-19 17:50:08,575 INFO L226 Difference]: Without dead ends: 165 [2021-02-19 17:50:08,575 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:50:08,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-02-19 17:50:08,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 143. [2021-02-19 17:50:08,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.2253521126760565) internal successors, (316), 142 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) [2021-02-19 17:50:08,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 316 transitions. [2021-02-19 17:50:08,577 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 316 transitions. Word has length 18 [2021-02-19 17:50:08,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:50:08,577 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 316 transitions. [2021-02-19 17:50:08,577 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) [2021-02-19 17:50:08,577 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 316 transitions. [2021-02-19 17:50:08,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:50:08,577 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:50:08,578 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:50:08,778 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 281 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1411 [2021-02-19 17:50:08,778 INFO L428 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:50:08,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:50:08,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1502372021, now seen corresponding path program 281 times [2021-02-19 17:50:08,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:50:08,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888835450] [2021-02-19 17:50:08,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:50:08,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:50:09,243 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:09,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888835450] [2021-02-19 17:50:09,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080841955] [2021-02-19 17:50:09,244 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 [2021-02-19 17:50:09,263 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 17:50:09,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:50:09,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:50:09,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:50:09,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:09,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:09,717 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 [2021-02-19 17:50:09,718 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:09,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:09,722 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 [2021-02-19 17:50:09,723 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:09,803 INFO L628 ElimStorePlain]: treesize reduction 85, result has 45.9 percent of original size [2021-02-19 17:50:09,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:09,806 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 [2021-02-19 17:50:09,808 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:50:09,837 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:09,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:09,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:50:09,841 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:09,868 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:09,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:09,871 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 13 treesize of output 9 [2021-02-19 17:50:09,872 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:50:09,901 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:09,903 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:50:09,903 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-02-19 17:50:10,124 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:10,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:50:10,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-02-19 17:50:10,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514306869] [2021-02-19 17:50:10,124 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:50:10,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:50:10,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:50:10,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:50:10,125 INFO L87 Difference]: Start difference. First operand 143 states and 316 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) [2021-02-19 17:50:10,597 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2021-02-19 17:50:10,813 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2021-02-19 17:50:11,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:50:11,184 INFO L93 Difference]: Finished difference Result 206 states and 434 transitions. [2021-02-19 17:50:11,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:50:11,186 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 [2021-02-19 17:50:11,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:50:11,187 INFO L225 Difference]: With dead ends: 206 [2021-02-19 17:50:11,187 INFO L226 Difference]: Without dead ends: 194 [2021-02-19 17:50:11,187 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:50:11,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-02-19 17:50:11,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 146. [2021-02-19 17:50:11,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.220689655172414) internal successors, (322), 145 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) [2021-02-19 17:50:11,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 322 transitions. [2021-02-19 17:50:11,189 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 322 transitions. Word has length 18 [2021-02-19 17:50:11,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:50:11,189 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 322 transitions. [2021-02-19 17:50:11,189 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) [2021-02-19 17:50:11,189 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 322 transitions. [2021-02-19 17:50:11,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:50:11,190 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:50:11,190 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:50:11,390 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1416,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:50:11,390 INFO L428 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:50:11,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:50:11,390 INFO L82 PathProgramCache]: Analyzing trace with hash 375695816, now seen corresponding path program 282 times [2021-02-19 17:50:11,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:50:11,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120590324] [2021-02-19 17:50:11,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:50:11,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:50:11,593 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:11,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120590324] [2021-02-19 17:50:11,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193820105] [2021-02-19 17:50:11,593 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 [2021-02-19 17:50:11,613 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:50:11,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:50:11,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:50:11,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:50:11,862 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 [2021-02-19 17:50:11,865 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:11,869 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 [2021-02-19 17:50:11,872 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:11,904 INFO L628 ElimStorePlain]: treesize reduction 22, result has 29.0 percent of original size [2021-02-19 17:50:11,904 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:50:11,905 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:50:11,906 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:65, output treesize:9 [2021-02-19 17:50:12,003 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:12,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:50:12,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-02-19 17:50:12,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057142238] [2021-02-19 17:50:12,004 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:50:12,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:50:12,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:50:12,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:50:12,004 INFO L87 Difference]: Start difference. First operand 146 states and 322 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) [2021-02-19 17:50:12,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:50:12,326 INFO L93 Difference]: Finished difference Result 190 states and 404 transitions. [2021-02-19 17:50:12,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:50:12,328 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 [2021-02-19 17:50:12,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:50:12,329 INFO L225 Difference]: With dead ends: 190 [2021-02-19 17:50:12,329 INFO L226 Difference]: Without dead ends: 190 [2021-02-19 17:50:12,329 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:50:12,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-02-19 17:50:12,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 150. [2021-02-19 17:50:12,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.214765100671141) internal successors, (330), 149 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) [2021-02-19 17:50:12,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 330 transitions. [2021-02-19 17:50:12,331 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 330 transitions. Word has length 19 [2021-02-19 17:50:12,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:50:12,331 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 330 transitions. [2021-02-19 17:50:12,331 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) [2021-02-19 17:50:12,331 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 330 transitions. [2021-02-19 17:50:12,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:50:12,331 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:50:12,331 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:50:12,531 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1421 [2021-02-19 17:50:12,532 INFO L428 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:50:12,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:50:12,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1357243164, now seen corresponding path program 283 times [2021-02-19 17:50:12,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:50:12,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643353875] [2021-02-19 17:50:12,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:50:12,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:50:12,746 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:12,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643353875] [2021-02-19 17:50:12,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501512770] [2021-02-19 17:50:12,746 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 [2021-02-19 17:50:12,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:50:12,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:50:12,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:50:13,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:13,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:13,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:50:13,128 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:13,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:13,133 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 [2021-02-19 17:50:13,136 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:13,179 INFO L628 ElimStorePlain]: treesize reduction 34, result has 30.6 percent of original size [2021-02-19 17:50:13,179 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:50:13,181 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:50:13,181 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-02-19 17:50:13,229 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:13,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:50:13,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:50:13,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788432286] [2021-02-19 17:50:13,230 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:50:13,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:50:13,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:50:13,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:50:13,230 INFO L87 Difference]: Start difference. First operand 150 states and 330 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) [2021-02-19 17:50:14,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:50:14,020 INFO L93 Difference]: Finished difference Result 210 states and 444 transitions. [2021-02-19 17:50:14,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:50:14,022 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 [2021-02-19 17:50:14,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:50:14,022 INFO L225 Difference]: With dead ends: 210 [2021-02-19 17:50:14,022 INFO L226 Difference]: Without dead ends: 210 [2021-02-19 17:50:14,023 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:50:14,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-02-19 17:50:14,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 150. [2021-02-19 17:50:14,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.214765100671141) internal successors, (330), 149 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) [2021-02-19 17:50:14,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 330 transitions. [2021-02-19 17:50:14,025 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 330 transitions. Word has length 19 [2021-02-19 17:50:14,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:50:14,025 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 330 transitions. [2021-02-19 17:50:14,025 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) [2021-02-19 17:50:14,025 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 330 transitions. [2021-02-19 17:50:14,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:50:14,025 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:50:14,025 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:50:14,226 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1423,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:50:14,227 INFO L428 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:50:14,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:50:14,227 INFO L82 PathProgramCache]: Analyzing trace with hash 655302728, now seen corresponding path program 284 times [2021-02-19 17:50:14,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:50:14,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789286479] [2021-02-19 17:50:14,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:50:14,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:50:14,452 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:14,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789286479] [2021-02-19 17:50:14,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123582653] [2021-02-19 17:50:14,453 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 [2021-02-19 17:50:14,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:50:14,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:50:14,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:50:14,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:50:14,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:14,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:14,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:50:14,889 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:14,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:14,894 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 17 treesize of output 13 [2021-02-19 17:50:14,897 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:14,939 INFO L628 ElimStorePlain]: treesize reduction 36, result has 29.4 percent of original size [2021-02-19 17:50:14,939 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:50:14,941 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:50:14,942 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-02-19 17:50:14,970 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:14,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:50:14,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:50:14,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111067294] [2021-02-19 17:50:14,970 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:50:14,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:50:14,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:50:14,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:50:14,971 INFO L87 Difference]: Start difference. First operand 150 states and 330 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) [2021-02-19 17:50:15,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:50:15,432 INFO L93 Difference]: Finished difference Result 206 states and 436 transitions. [2021-02-19 17:50:15,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:50:15,434 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 [2021-02-19 17:50:15,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:50:15,435 INFO L225 Difference]: With dead ends: 206 [2021-02-19 17:50:15,435 INFO L226 Difference]: Without dead ends: 206 [2021-02-19 17:50:15,435 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:50:15,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-02-19 17:50:15,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 150. [2021-02-19 17:50:15,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.214765100671141) internal successors, (330), 149 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) [2021-02-19 17:50:15,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 330 transitions. [2021-02-19 17:50:15,437 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 330 transitions. Word has length 19 [2021-02-19 17:50:15,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:50:15,437 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 330 transitions. [2021-02-19 17:50:15,437 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) [2021-02-19 17:50:15,437 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 330 transitions. [2021-02-19 17:50:15,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:50:15,438 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:50:15,438 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:50:15,638 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1425 [2021-02-19 17:50:15,638 INFO L428 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:50:15,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:50:15,638 INFO L82 PathProgramCache]: Analyzing trace with hash 494112156, now seen corresponding path program 285 times [2021-02-19 17:50:15,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:50:15,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489178461] [2021-02-19 17:50:15,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:50:15,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:50:15,858 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:15,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489178461] [2021-02-19 17:50:15,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970671425] [2021-02-19 17:50:15,859 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 [2021-02-19 17:50:15,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:50:15,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:50:15,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:50:15,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:50:16,368 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:16,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:50:16,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-02-19 17:50:16,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043845019] [2021-02-19 17:50:16,368 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:50:16,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:50:16,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:50:16,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:50:16,369 INFO L87 Difference]: Start difference. First operand 150 states and 330 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) [2021-02-19 17:50:17,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:50:17,033 INFO L93 Difference]: Finished difference Result 203 states and 430 transitions. [2021-02-19 17:50:17,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:50:17,035 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 [2021-02-19 17:50:17,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:50:17,035 INFO L225 Difference]: With dead ends: 203 [2021-02-19 17:50:17,035 INFO L226 Difference]: Without dead ends: 203 [2021-02-19 17:50:17,035 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:50:17,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-02-19 17:50:17,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 151. [2021-02-19 17:50:17,037 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) [2021-02-19 17:50:17,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 332 transitions. [2021-02-19 17:50:17,037 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 332 transitions. Word has length 19 [2021-02-19 17:50:17,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:50:17,037 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 332 transitions. [2021-02-19 17:50:17,037 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) [2021-02-19 17:50:17,038 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 332 transitions. [2021-02-19 17:50:17,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:50:17,038 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:50:17,038 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:50:17,238 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1427 [2021-02-19 17:50:17,238 INFO L428 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:50:17,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:50:17,239 INFO L82 PathProgramCache]: Analyzing trace with hash 350365128, now seen corresponding path program 286 times [2021-02-19 17:50:17,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:50:17,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966219611] [2021-02-19 17:50:17,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:50:17,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:50:17,354 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:17,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966219611] [2021-02-19 17:50:17,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006394617] [2021-02-19 17:50:17,354 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 [2021-02-19 17:50:17,373 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:50:17,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:50:17,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:50:17,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:50:17,893 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:17,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:50:17,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:50:17,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615866561] [2021-02-19 17:50:17,894 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:50:17,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:50:17,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:50:17,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:50:17,894 INFO L87 Difference]: Start difference. First operand 151 states and 332 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) [2021-02-19 17:50:18,561 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2021-02-19 17:50:18,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:50:18,832 INFO L93 Difference]: Finished difference Result 203 states and 430 transitions. [2021-02-19 17:50:18,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:50:18,834 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 [2021-02-19 17:50:18,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:50:18,834 INFO L225 Difference]: With dead ends: 203 [2021-02-19 17:50:18,834 INFO L226 Difference]: Without dead ends: 203 [2021-02-19 17:50:18,834 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:50:18,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-02-19 17:50:18,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 151. [2021-02-19 17:50:18,836 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) [2021-02-19 17:50:18,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 332 transitions. [2021-02-19 17:50:18,836 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 332 transitions. Word has length 19 [2021-02-19 17:50:18,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:50:18,836 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 332 transitions. [2021-02-19 17:50:18,836 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) [2021-02-19 17:50:18,836 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 332 transitions. [2021-02-19 17:50:18,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:50:18,837 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:50:18,837 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:50:19,037 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 287 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1431 [2021-02-19 17:50:19,037 INFO L428 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:50:19,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:50:19,037 INFO L82 PathProgramCache]: Analyzing trace with hash -488455369, now seen corresponding path program 287 times [2021-02-19 17:50:19,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:50:19,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885321487] [2021-02-19 17:50:19,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:50:19,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:50:19,270 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:19,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885321487] [2021-02-19 17:50:19,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512288578] [2021-02-19 17:50:19,271 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 [2021-02-19 17:50:19,290 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:50:19,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:50:19,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:50:19,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:50:19,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:19,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:19,631 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 15 treesize of output 11 [2021-02-19 17:50:19,633 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:19,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:19,640 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 16 treesize of output 12 [2021-02-19 17:50:19,642 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:19,756 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 26 [2021-02-19 17:50:19,757 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-02-19 17:50:19,757 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:50:19,761 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 [2021-02-19 17:50:19,764 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:19,792 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:19,792 INFO L518 ElimStorePlain]: Eliminatee v_prenex_231 vanished before elimination [2021-02-19 17:50:19,794 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:50:19,794 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-02-19 17:50:19,871 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:19,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:50:19,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-02-19 17:50:19,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747596878] [2021-02-19 17:50:19,872 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:50:19,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:50:19,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:50:19,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:50:19,873 INFO L87 Difference]: Start difference. First operand 151 states and 332 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) [2021-02-19 17:50:20,204 WARN L202 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-02-19 17:50:20,559 WARN L202 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2021-02-19 17:50:20,929 WARN L202 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2021-02-19 17:50:21,217 WARN L202 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2021-02-19 17:50:21,465 WARN L202 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2021-02-19 17:50:22,083 WARN L202 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2021-02-19 17:50:22,266 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 49 [2021-02-19 17:50:22,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:50:22,299 INFO L93 Difference]: Finished difference Result 198 states and 411 transitions. [2021-02-19 17:50:22,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:50:22,300 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 [2021-02-19 17:50:22,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:50:22,300 INFO L225 Difference]: With dead ends: 198 [2021-02-19 17:50:22,300 INFO L226 Difference]: Without dead ends: 195 [2021-02-19 17:50:22,300 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:50:22,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-02-19 17:50:22,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 156. [2021-02-19 17:50:22,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.2129032258064516) internal successors, (343), 155 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:50:22,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 343 transitions. [2021-02-19 17:50:22,302 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 343 transitions. Word has length 19 [2021-02-19 17:50:22,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:50:22,302 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 343 transitions. [2021-02-19 17:50:22,302 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) [2021-02-19 17:50:22,302 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 343 transitions. [2021-02-19 17:50:22,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:50:22,302 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:50:22,302 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:50:22,503 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1443 [2021-02-19 17:50:22,503 INFO L428 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:50:22,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:50:22,503 INFO L82 PathProgramCache]: Analyzing trace with hash -96972595, now seen corresponding path program 288 times [2021-02-19 17:50:22,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:50:22,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450399797] [2021-02-19 17:50:22,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:50:22,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:50:22,794 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:22,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450399797] [2021-02-19 17:50:22,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296057206] [2021-02-19 17:50:22,794 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 [2021-02-19 17:50:22,814 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:50:22,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:50:22,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:50:22,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:50:23,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:23,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:23,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:50:23,303 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:23,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:23,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:50:23,311 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:23,407 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-02-19 17:50:23,408 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:50:23,411 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 [2021-02-19 17:50:23,414 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:23,445 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:23,446 INFO L518 ElimStorePlain]: Eliminatee v_prenex_234 vanished before elimination [2021-02-19 17:50:23,447 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:50:23,448 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-02-19 17:50:23,520 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:23,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:50:23,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-02-19 17:50:23,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905989234] [2021-02-19 17:50:23,521 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:50:23,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:50:23,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:50:23,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:50:23,521 INFO L87 Difference]: Start difference. First operand 156 states and 343 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) [2021-02-19 17:50:23,779 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-02-19 17:50:23,972 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2021-02-19 17:50:24,198 WARN L202 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2021-02-19 17:50:24,402 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 42 [2021-02-19 17:50:24,617 WARN L202 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2021-02-19 17:50:24,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:50:24,830 INFO L93 Difference]: Finished difference Result 183 states and 390 transitions. [2021-02-19 17:50:24,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:50:24,832 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 [2021-02-19 17:50:24,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:50:24,832 INFO L225 Difference]: With dead ends: 183 [2021-02-19 17:50:24,832 INFO L226 Difference]: Without dead ends: 183 [2021-02-19 17:50:24,832 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:50:24,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-02-19 17:50:24,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 152. [2021-02-19 17:50:24,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.2119205298013247) internal successors, (334), 151 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:50:24,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 334 transitions. [2021-02-19 17:50:24,834 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 334 transitions. Word has length 19 [2021-02-19 17:50:24,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:50:24,834 INFO L480 AbstractCegarLoop]: Abstraction has 152 states and 334 transitions. [2021-02-19 17:50:24,834 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) [2021-02-19 17:50:24,834 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 334 transitions. [2021-02-19 17:50:24,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:50:24,834 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:50:24,834 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:50:25,035 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 289 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1451 [2021-02-19 17:50:25,035 INFO L428 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:50:25,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:50:25,035 INFO L82 PathProgramCache]: Analyzing trace with hash 720776310, now seen corresponding path program 289 times [2021-02-19 17:50:25,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:50:25,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55626370] [2021-02-19 17:50:25,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:50:25,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:50:25,139 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:25,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55626370] [2021-02-19 17:50:25,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714081669] [2021-02-19 17:50:25,139 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 [2021-02-19 17:50:25,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:50:25,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:50:25,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:50:25,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:25,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:25,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:50:25,508 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:25,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:25,516 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 [2021-02-19 17:50:25,519 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:25,544 INFO L628 ElimStorePlain]: treesize reduction 36, result has 29.4 percent of original size [2021-02-19 17:50:25,544 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:50:25,545 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:50:25,545 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-02-19 17:50:25,597 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:25,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:50:25,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:50:25,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002898801] [2021-02-19 17:50:25,598 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:50:25,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:50:25,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:50:25,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:50:25,598 INFO L87 Difference]: Start difference. First operand 152 states and 334 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) [2021-02-19 17:50:26,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:50:26,153 INFO L93 Difference]: Finished difference Result 177 states and 382 transitions. [2021-02-19 17:50:26,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:50:26,155 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 [2021-02-19 17:50:26,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:50:26,156 INFO L225 Difference]: With dead ends: 177 [2021-02-19 17:50:26,156 INFO L226 Difference]: Without dead ends: 177 [2021-02-19 17:50:26,156 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:50:26,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-02-19 17:50:26,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 154. [2021-02-19 17:50:26,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.2091503267973858) internal successors, (338), 153 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) [2021-02-19 17:50:26,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 338 transitions. [2021-02-19 17:50:26,158 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 338 transitions. Word has length 19 [2021-02-19 17:50:26,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:50:26,158 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 338 transitions. [2021-02-19 17:50:26,158 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) [2021-02-19 17:50:26,158 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 338 transitions. [2021-02-19 17:50:26,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:50:26,159 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:50:26,159 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:50:26,359 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1458 [2021-02-19 17:50:26,359 INFO L428 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:50:26,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:50:26,359 INFO L82 PathProgramCache]: Analyzing trace with hash 18835874, now seen corresponding path program 290 times [2021-02-19 17:50:26,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:50:26,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282038343] [2021-02-19 17:50:26,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:50:26,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:50:26,560 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:26,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282038343] [2021-02-19 17:50:26,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062500304] [2021-02-19 17:50:26,560 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 [2021-02-19 17:50:26,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:50:26,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:50:26,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:50:26,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:50:26,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:26,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:26,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:50:26,967 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:26,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:26,973 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 [2021-02-19 17:50:26,975 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:27,023 INFO L628 ElimStorePlain]: treesize reduction 34, result has 30.6 percent of original size [2021-02-19 17:50:27,024 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:50:27,026 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:50:27,026 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-02-19 17:50:27,072 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:27,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:50:27,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:50:27,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127097462] [2021-02-19 17:50:27,072 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:50:27,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:50:27,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:50:27,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:50:27,073 INFO L87 Difference]: Start difference. First operand 154 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) [2021-02-19 17:50:27,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:50:27,619 INFO L93 Difference]: Finished difference Result 194 states and 416 transitions. [2021-02-19 17:50:27,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:50:27,621 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 [2021-02-19 17:50:27,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:50:27,621 INFO L225 Difference]: With dead ends: 194 [2021-02-19 17:50:27,621 INFO L226 Difference]: Without dead ends: 194 [2021-02-19 17:50:27,622 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:50:27,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-02-19 17:50:27,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 155. [2021-02-19 17:50:27,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.207792207792208) internal successors, (340), 154 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) [2021-02-19 17:50:27,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 340 transitions. [2021-02-19 17:50:27,624 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 340 transitions. Word has length 19 [2021-02-19 17:50:27,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:50:27,624 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 340 transitions. [2021-02-19 17:50:27,624 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) [2021-02-19 17:50:27,624 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 340 transitions. [2021-02-19 17:50:27,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:50:27,624 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:50:27,624 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:50:27,826 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1460,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:50:27,826 INFO L428 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:50:27,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:50:27,827 INFO L82 PathProgramCache]: Analyzing trace with hash -142354698, now seen corresponding path program 291 times [2021-02-19 17:50:27,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:50:27,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686928082] [2021-02-19 17:50:27,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:50:27,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:50:28,016 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:28,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686928082] [2021-02-19 17:50:28,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086691790] [2021-02-19 17:50:28,016 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 [2021-02-19 17:50:28,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:50:28,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:50:28,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:50:28,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:50:28,277 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:28,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:50:28,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-02-19 17:50:28,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935177306] [2021-02-19 17:50:28,278 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:50:28,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:50:28,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:50:28,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:50:28,278 INFO L87 Difference]: Start difference. First operand 155 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) [2021-02-19 17:50:28,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:50:28,826 INFO L93 Difference]: Finished difference Result 191 states and 410 transitions. [2021-02-19 17:50:28,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:50:28,828 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 [2021-02-19 17:50:28,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:50:28,829 INFO L225 Difference]: With dead ends: 191 [2021-02-19 17:50:28,829 INFO L226 Difference]: Without dead ends: 191 [2021-02-19 17:50:28,829 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:50:28,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-02-19 17:50:28,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 156. [2021-02-19 17:50:28,831 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) [2021-02-19 17:50:28,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 342 transitions. [2021-02-19 17:50:28,831 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 342 transitions. Word has length 19 [2021-02-19 17:50:28,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:50:28,831 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 342 transitions. [2021-02-19 17:50:28,831 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) [2021-02-19 17:50:28,831 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 342 transitions. [2021-02-19 17:50:28,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:50:28,831 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:50:28,831 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:50:29,032 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1462 [2021-02-19 17:50:29,032 INFO L428 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:50:29,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:50:29,032 INFO L82 PathProgramCache]: Analyzing trace with hash -491339410, now seen corresponding path program 292 times [2021-02-19 17:50:29,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:50:29,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632597939] [2021-02-19 17:50:29,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:50:29,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:50:29,274 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:29,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632597939] [2021-02-19 17:50:29,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55191197] [2021-02-19 17:50:29,275 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 [2021-02-19 17:50:29,294 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:50:29,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:50:29,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:50:29,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:50:29,787 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:29,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:50:29,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-02-19 17:50:29,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090621498] [2021-02-19 17:50:29,787 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:50:29,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:50:29,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:50:29,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:50:29,788 INFO L87 Difference]: Start difference. First operand 156 states and 342 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) [2021-02-19 17:50:30,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:50:30,406 INFO L93 Difference]: Finished difference Result 189 states and 407 transitions. [2021-02-19 17:50:30,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:50:30,408 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 [2021-02-19 17:50:30,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:50:30,409 INFO L225 Difference]: With dead ends: 189 [2021-02-19 17:50:30,409 INFO L226 Difference]: Without dead ends: 189 [2021-02-19 17:50:30,409 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:50:30,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-02-19 17:50:30,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 157. [2021-02-19 17:50:30,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.2051282051282053) internal successors, (344), 156 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) [2021-02-19 17:50:30,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 344 transitions. [2021-02-19 17:50:30,411 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 344 transitions. Word has length 19 [2021-02-19 17:50:30,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:50:30,411 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 344 transitions. [2021-02-19 17:50:30,411 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) [2021-02-19 17:50:30,411 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 344 transitions. [2021-02-19 17:50:30,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:50:30,411 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:50:30,412 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:50:30,626 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1466,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:50:30,626 INFO L428 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:50:30,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:50:30,626 INFO L82 PathProgramCache]: Analyzing trace with hash -733439449, now seen corresponding path program 293 times [2021-02-19 17:50:30,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:50:30,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852148676] [2021-02-19 17:50:30,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:50:30,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:50:30,781 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:30,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852148676] [2021-02-19 17:50:30,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718411055] [2021-02-19 17:50:30,781 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 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 [2021-02-19 17:50:30,800 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 17:50:30,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:50:30,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:50:30,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:50:31,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:31,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:31,172 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 17 treesize of output 13 [2021-02-19 17:50:31,179 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:31,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:31,187 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 16 treesize of output 12 [2021-02-19 17:50:31,190 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:31,303 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 25 [2021-02-19 17:50:31,304 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-02-19 17:50:31,309 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 [2021-02-19 17:50:31,312 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:31,350 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:31,351 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:50:31,351 INFO L518 ElimStorePlain]: Eliminatee v_prenex_240 vanished before elimination [2021-02-19 17:50:31,353 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:50:31,354 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-02-19 17:50:31,436 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:31,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:50:31,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-02-19 17:50:31,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715624956] [2021-02-19 17:50:31,437 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:50:31,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:50:31,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:50:31,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:50:31,438 INFO L87 Difference]: Start difference. First operand 157 states and 344 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) [2021-02-19 17:50:31,856 WARN L202 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-02-19 17:50:32,183 WARN L202 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2021-02-19 17:50:32,453 WARN L202 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2021-02-19 17:50:32,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:50:32,635 INFO L93 Difference]: Finished difference Result 167 states and 362 transitions. [2021-02-19 17:50:32,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:50:32,637 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 [2021-02-19 17:50:32,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:50:32,637 INFO L225 Difference]: With dead ends: 167 [2021-02-19 17:50:32,638 INFO L226 Difference]: Without dead ends: 167 [2021-02-19 17:50:32,638 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:50:32,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-02-19 17:50:32,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 153. [2021-02-19 17:50:32,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.210526315789474) internal successors, (336), 152 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) [2021-02-19 17:50:32,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 336 transitions. [2021-02-19 17:50:32,640 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 336 transitions. Word has length 19 [2021-02-19 17:50:32,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:50:32,640 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 336 transitions. [2021-02-19 17:50:32,640 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) [2021-02-19 17:50:32,640 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 336 transitions. [2021-02-19 17:50:32,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:50:32,640 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:50:32,640 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:50:32,841 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 294 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1476 [2021-02-19 17:50:32,841 INFO L428 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:50:32,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:50:32,841 INFO L82 PathProgramCache]: Analyzing trace with hash -2093592756, now seen corresponding path program 294 times [2021-02-19 17:50:32,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:50:32,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411568545] [2021-02-19 17:50:32,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:50:32,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:50:33,079 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:33,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411568545] [2021-02-19 17:50:33,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917906055] [2021-02-19 17:50:33,080 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 [2021-02-19 17:50:33,099 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:50:33,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:50:33,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:50:33,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:50:33,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:33,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:33,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:50:33,329 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:33,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:33,331 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 [2021-02-19 17:50:33,332 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:33,354 INFO L628 ElimStorePlain]: treesize reduction 34, result has 30.6 percent of original size [2021-02-19 17:50:33,354 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:50:33,355 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:50:33,355 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-02-19 17:50:33,377 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:33,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:50:33,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:50:33,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277600452] [2021-02-19 17:50:33,377 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:50:33,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:50:33,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:50:33,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:50:33,378 INFO L87 Difference]: Start difference. First operand 153 states and 336 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) [2021-02-19 17:50:34,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:50:34,077 INFO L93 Difference]: Finished difference Result 191 states and 410 transitions. [2021-02-19 17:50:34,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:50:34,079 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 [2021-02-19 17:50:34,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:50:34,080 INFO L225 Difference]: With dead ends: 191 [2021-02-19 17:50:34,080 INFO L226 Difference]: Without dead ends: 191 [2021-02-19 17:50:34,080 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:50:34,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-02-19 17:50:34,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 157. [2021-02-19 17:50:34,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.2051282051282053) internal successors, (344), 156 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) [2021-02-19 17:50:34,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 344 transitions. [2021-02-19 17:50:34,082 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 344 transitions. Word has length 19 [2021-02-19 17:50:34,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:50:34,082 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 344 transitions. [2021-02-19 17:50:34,082 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) [2021-02-19 17:50:34,082 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 344 transitions. [2021-02-19 17:50:34,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:50:34,083 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:50:34,083 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:50:34,296 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1483,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:50:34,297 INFO L428 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:50:34,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:50:34,297 INFO L82 PathProgramCache]: Analyzing trace with hash 2040183968, now seen corresponding path program 295 times [2021-02-19 17:50:34,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:50:34,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791715367] [2021-02-19 17:50:34,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:50:34,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:50:34,534 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:34,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791715367] [2021-02-19 17:50:34,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604348627] [2021-02-19 17:50:34,534 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 [2021-02-19 17:50:34,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:50:34,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:50:34,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:50:34,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:34,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:34,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:50:34,962 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:34,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:34,968 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 17 treesize of output 13 [2021-02-19 17:50:34,971 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:35,018 INFO L628 ElimStorePlain]: treesize reduction 34, result has 30.6 percent of original size [2021-02-19 17:50:35,018 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:50:35,020 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:50:35,021 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-02-19 17:50:35,074 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:35,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:50:35,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:50:35,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145495471] [2021-02-19 17:50:35,074 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:50:35,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:50:35,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:50:35,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:50:35,075 INFO L87 Difference]: Start difference. First operand 157 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) [2021-02-19 17:50:36,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:50:36,208 INFO L93 Difference]: Finished difference Result 210 states and 448 transitions. [2021-02-19 17:50:36,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 17:50:36,209 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 [2021-02-19 17:50:36,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:50:36,210 INFO L225 Difference]: With dead ends: 210 [2021-02-19 17:50:36,210 INFO L226 Difference]: Without dead ends: 210 [2021-02-19 17:50:36,210 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:50:36,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-02-19 17:50:36,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 158. [2021-02-19 17:50:36,212 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) [2021-02-19 17:50:36,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 346 transitions. [2021-02-19 17:50:36,212 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 346 transitions. Word has length 19 [2021-02-19 17:50:36,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:50:36,212 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 346 transitions. [2021-02-19 17:50:36,212 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) [2021-02-19 17:50:36,212 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 346 transitions. [2021-02-19 17:50:36,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:50:36,212 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:50:36,212 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:50:36,413 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1485 [2021-02-19 17:50:36,413 INFO L428 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:50:36,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:50:36,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1691199256, now seen corresponding path program 296 times [2021-02-19 17:50:36,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:50:36,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902543563] [2021-02-19 17:50:36,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:50:36,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:50:36,684 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:36,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902543563] [2021-02-19 17:50:36,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988252888] [2021-02-19 17:50:36,685 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 [2021-02-19 17:50:36,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:50:36,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:50:36,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:50:36,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:50:37,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:37,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:37,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:50:37,074 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:37,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:37,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:50:37,083 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:37,221 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2021-02-19 17:50:37,222 INFO L628 ElimStorePlain]: treesize reduction 74, result has 38.8 percent of original size [2021-02-19 17:50:37,222 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:50:37,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:37,228 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 18 treesize of output 14 [2021-02-19 17:50:37,231 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:37,282 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:37,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:37,288 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 12 treesize of output 8 [2021-02-19 17:50:37,293 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:50:37,337 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:37,340 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:50:37,340 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-02-19 17:50:37,459 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:37,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:50:37,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:50:37,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625596258] [2021-02-19 17:50:37,459 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:50:37,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:50:37,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:50:37,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:50:37,460 INFO L87 Difference]: Start difference. First operand 158 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) [2021-02-19 17:50:38,094 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2021-02-19 17:50:38,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:50:38,611 INFO L93 Difference]: Finished difference Result 210 states and 448 transitions. [2021-02-19 17:50:38,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 17:50:38,613 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 [2021-02-19 17:50:38,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:50:38,614 INFO L225 Difference]: With dead ends: 210 [2021-02-19 17:50:38,614 INFO L226 Difference]: Without dead ends: 210 [2021-02-19 17:50:38,614 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:50:38,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-02-19 17:50:38,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 159. [2021-02-19 17:50:38,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.2025316455696204) internal successors, (348), 158 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) [2021-02-19 17:50:38,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 348 transitions. [2021-02-19 17:50:38,616 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 348 transitions. Word has length 19 [2021-02-19 17:50:38,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:50:38,616 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 348 transitions. [2021-02-19 17:50:38,616 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) [2021-02-19 17:50:38,616 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 348 transitions. [2021-02-19 17:50:38,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:50:38,616 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:50:38,616 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:50:38,817 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1487 [2021-02-19 17:50:38,817 INFO L428 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:50:38,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:50:38,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1449099217, now seen corresponding path program 297 times [2021-02-19 17:50:38,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:50:38,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492133949] [2021-02-19 17:50:38,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:50:38,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:50:39,054 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:39,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492133949] [2021-02-19 17:50:39,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397590097] [2021-02-19 17:50:39,054 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 [2021-02-19 17:50:39,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:50:39,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:50:39,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:50:39,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:50:39,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:39,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:39,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:50:39,459 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:39,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:39,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:50:39,468 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:39,577 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 26 [2021-02-19 17:50:39,578 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-02-19 17:50:39,578 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:50:39,582 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 [2021-02-19 17:50:39,586 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:39,625 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:39,625 INFO L518 ElimStorePlain]: Eliminatee v_prenex_247 vanished before elimination [2021-02-19 17:50:39,627 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:50:39,627 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-02-19 17:50:39,702 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:39,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:50:39,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-02-19 17:50:39,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084966908] [2021-02-19 17:50:39,703 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:50:39,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:50:39,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:50:39,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:50:39,703 INFO L87 Difference]: Start difference. First operand 159 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) [2021-02-19 17:50:40,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:50:40,734 INFO L93 Difference]: Finished difference Result 177 states and 382 transitions. [2021-02-19 17:50:40,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:50:40,736 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 [2021-02-19 17:50:40,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:50:40,736 INFO L225 Difference]: With dead ends: 177 [2021-02-19 17:50:40,737 INFO L226 Difference]: Without dead ends: 177 [2021-02-19 17:50:40,737 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:50:40,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-02-19 17:50:40,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 156. [2021-02-19 17:50:40,738 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) [2021-02-19 17:50:40,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 342 transitions. [2021-02-19 17:50:40,739 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 342 transitions. Word has length 19 [2021-02-19 17:50:40,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:50:40,739 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 342 transitions. [2021-02-19 17:50:40,739 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) [2021-02-19 17:50:40,739 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 342 transitions. [2021-02-19 17:50:40,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:50:40,739 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:50:40,739 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:50:40,939 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1491,298 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:50:40,939 INFO L428 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:50:40,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:50:40,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1214547530, now seen corresponding path program 298 times [2021-02-19 17:50:40,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:50:40,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014324217] [2021-02-19 17:50:40,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:50:40,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:50:41,175 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:41,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014324217] [2021-02-19 17:50:41,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507976179] [2021-02-19 17:50:41,175 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 [2021-02-19 17:50:41,195 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:50:41,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:50:41,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:50:41,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:50:41,563 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:41,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:50:41,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-02-19 17:50:41,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734086169] [2021-02-19 17:50:41,564 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:50:41,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:50:41,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:50:41,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:50:41,564 INFO L87 Difference]: Start difference. First operand 156 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) [2021-02-19 17:50:42,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:50:42,471 INFO L93 Difference]: Finished difference Result 194 states and 416 transitions. [2021-02-19 17:50:42,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:50:42,472 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 [2021-02-19 17:50:42,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:50:42,473 INFO L225 Difference]: With dead ends: 194 [2021-02-19 17:50:42,473 INFO L226 Difference]: Without dead ends: 194 [2021-02-19 17:50:42,473 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:50:42,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-02-19 17:50:42,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 158. [2021-02-19 17:50:42,474 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) [2021-02-19 17:50:42,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 346 transitions. [2021-02-19 17:50:42,475 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 346 transitions. Word has length 19 [2021-02-19 17:50:42,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:50:42,475 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 346 transitions. [2021-02-19 17:50:42,475 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) [2021-02-19 17:50:42,475 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 346 transitions. [2021-02-19 17:50:42,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:50:42,475 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:50:42,475 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:50:42,675 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1498,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:50:42,676 INFO L428 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:50:42,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:50:42,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1358294558, now seen corresponding path program 299 times [2021-02-19 17:50:42,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:50:42,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355504790] [2021-02-19 17:50:42,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:50:42,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:50:42,894 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:42,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355504790] [2021-02-19 17:50:42,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566540030] [2021-02-19 17:50:42,894 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 [2021-02-19 17:50:42,926 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 17:50:42,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:50:42,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:50:42,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:50:43,243 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:43,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:50:43,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-02-19 17:50:43,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980176230] [2021-02-19 17:50:43,244 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:50:43,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:50:43,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:50:43,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:50:43,244 INFO L87 Difference]: Start difference. First operand 158 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) [2021-02-19 17:50:44,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:50:44,408 INFO L93 Difference]: Finished difference Result 212 states and 452 transitions. [2021-02-19 17:50:44,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 17:50:44,410 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 [2021-02-19 17:50:44,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:50:44,411 INFO L225 Difference]: With dead ends: 212 [2021-02-19 17:50:44,411 INFO L226 Difference]: Without dead ends: 212 [2021-02-19 17:50:44,411 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:50:44,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-02-19 17:50:44,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 158. [2021-02-19 17:50:44,412 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) [2021-02-19 17:50:44,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 346 transitions. [2021-02-19 17:50:44,412 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 346 transitions. Word has length 19 [2021-02-19 17:50:44,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:50:44,413 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 346 transitions. [2021-02-19 17:50:44,413 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) [2021-02-19 17:50:44,413 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 346 transitions. [2021-02-19 17:50:44,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:50:44,413 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:50:44,413 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:50:44,613 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1502 [2021-02-19 17:50:44,613 INFO L428 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:50:44,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:50:44,614 INFO L82 PathProgramCache]: Analyzing trace with hash 2097852241, now seen corresponding path program 300 times [2021-02-19 17:50:44,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:50:44,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747871040] [2021-02-19 17:50:44,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:50:44,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:50:44,843 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:44,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747871040] [2021-02-19 17:50:44,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936915685] [2021-02-19 17:50:44,844 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) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:50:44,863 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:50:44,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:50:44,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:50:44,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:50:45,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:45,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:45,151 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 15 treesize of output 11 [2021-02-19 17:50:45,154 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:45,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:45,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:50:45,162 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:45,269 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 26 [2021-02-19 17:50:45,270 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-02-19 17:50:45,270 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:50:45,274 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 [2021-02-19 17:50:45,277 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:45,311 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:45,312 INFO L518 ElimStorePlain]: Eliminatee v_prenex_249 vanished before elimination [2021-02-19 17:50:45,314 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:50:45,314 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-02-19 17:50:45,378 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:45,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:50:45,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-02-19 17:50:45,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883942943] [2021-02-19 17:50:45,378 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:50:45,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:50:45,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:50:45,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:50:45,378 INFO L87 Difference]: Start difference. First operand 158 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) [2021-02-19 17:50:46,271 WARN L202 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-02-19 17:50:46,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:50:46,865 INFO L93 Difference]: Finished difference Result 200 states and 419 transitions. [2021-02-19 17:50:46,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 17:50:46,867 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 [2021-02-19 17:50:46,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:50:46,868 INFO L225 Difference]: With dead ends: 200 [2021-02-19 17:50:46,868 INFO L226 Difference]: Without dead ends: 197 [2021-02-19 17:50:46,868 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2021-02-19 17:50:46,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-02-19 17:50:46,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 163. [2021-02-19 17:50:46,869 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) [2021-02-19 17:50:46,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 357 transitions. [2021-02-19 17:50:46,870 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 357 transitions. Word has length 19 [2021-02-19 17:50:46,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:50:46,870 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 357 transitions. [2021-02-19 17:50:46,870 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) [2021-02-19 17:50:46,870 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 357 transitions. [2021-02-19 17:50:46,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:50:46,870 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:50:46,870 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:50:47,070 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1514,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:50:47,070 INFO L428 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:50:47,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:50:47,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1805632281, now seen corresponding path program 301 times [2021-02-19 17:50:47,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:50:47,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023215978] [2021-02-19 17:50:47,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:50:47,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:50:47,194 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:47,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023215978] [2021-02-19 17:50:47,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097484740] [2021-02-19 17:50:47,194 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 [2021-02-19 17:50:47,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:50:47,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:50:47,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:50:47,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:47,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:47,440 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 15 treesize of output 11 [2021-02-19 17:50:47,442 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:47,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:47,448 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 16 treesize of output 12 [2021-02-19 17:50:47,451 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:47,555 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 26 [2021-02-19 17:50:47,556 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-02-19 17:50:47,556 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:50:47,560 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 [2021-02-19 17:50:47,562 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:47,588 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:47,588 INFO L518 ElimStorePlain]: Eliminatee v_prenex_252 vanished before elimination [2021-02-19 17:50:47,589 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:50:47,589 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-02-19 17:50:47,649 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:47,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:50:47,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-02-19 17:50:47,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635117337] [2021-02-19 17:50:47,650 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:50:47,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:50:47,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:50:47,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:50:47,650 INFO L87 Difference]: Start difference. First operand 163 states and 357 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) [2021-02-19 17:50:48,692 WARN L202 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-02-19 17:50:48,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:50:48,929 INFO L93 Difference]: Finished difference Result 185 states and 398 transitions. [2021-02-19 17:50:48,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 17:50:48,931 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 [2021-02-19 17:50:48,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:50:48,931 INFO L225 Difference]: With dead ends: 185 [2021-02-19 17:50:48,931 INFO L226 Difference]: Without dead ends: 185 [2021-02-19 17:50:48,931 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:50:48,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-02-19 17:50:48,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 157. [2021-02-19 17:50:48,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.2051282051282053) internal successors, (344), 156 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) [2021-02-19 17:50:48,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 344 transitions. [2021-02-19 17:50:48,933 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 344 transitions. Word has length 19 [2021-02-19 17:50:48,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:50:48,933 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 344 transitions. [2021-02-19 17:50:48,933 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) [2021-02-19 17:50:48,933 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 344 transitions. [2021-02-19 17:50:48,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:50:48,933 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:50:48,933 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:50:49,133 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 302 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1522 [2021-02-19 17:50:49,134 INFO L428 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:50:49,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:50:49,134 INFO L82 PathProgramCache]: Analyzing trace with hash -770549236, now seen corresponding path program 302 times [2021-02-19 17:50:49,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:50:49,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197376143] [2021-02-19 17:50:49,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:50:49,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:50:49,383 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:49,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197376143] [2021-02-19 17:50:49,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605974985] [2021-02-19 17:50:49,384 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 [2021-02-19 17:50:49,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:50:49,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:50:49,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:50:49,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:50:49,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:49,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:49,577 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 [2021-02-19 17:50:49,578 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:49,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:49,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:49,581 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 18 treesize of output 14 [2021-02-19 17:50:49,582 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:49,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:49,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:49,585 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 18 treesize of output 14 [2021-02-19 17:50:49,586 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:49,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:49,589 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 17 treesize of output 13 [2021-02-19 17:50:49,590 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:49,641 INFO L628 ElimStorePlain]: treesize reduction 75, result has 31.2 percent of original size [2021-02-19 17:50:49,641 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:50:49,642 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:50:49,642 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:133, output treesize:22 [2021-02-19 17:50:49,697 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:49,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:50:49,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:50:49,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584191712] [2021-02-19 17:50:49,697 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:50:49,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:50:49,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:50:49,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:50:49,698 INFO L87 Difference]: Start difference. First operand 157 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) [2021-02-19 17:50:50,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:50:50,495 INFO L93 Difference]: Finished difference Result 197 states and 414 transitions. [2021-02-19 17:50:50,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 17:50:50,496 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 [2021-02-19 17:50:50,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:50:50,497 INFO L225 Difference]: With dead ends: 197 [2021-02-19 17:50:50,497 INFO L226 Difference]: Without dead ends: 197 [2021-02-19 17:50:50,497 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:50:50,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-02-19 17:50:50,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 159. [2021-02-19 17:50:50,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.2088607594936707) internal successors, (349), 158 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) [2021-02-19 17:50:50,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 349 transitions. [2021-02-19 17:50:50,499 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 349 transitions. Word has length 19 [2021-02-19 17:50:50,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:50:50,499 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 349 transitions. [2021-02-19 17:50:50,499 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) [2021-02-19 17:50:50,499 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 349 transitions. [2021-02-19 17:50:50,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:50:50,499 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:50:50,499 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:50:50,699 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1529,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:50:50,700 INFO L428 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:50:50,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:50:50,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1217886959, now seen corresponding path program 303 times [2021-02-19 17:50:50,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:50:50,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651119151] [2021-02-19 17:50:50,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:50:50,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:50:50,935 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:50,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651119151] [2021-02-19 17:50:50,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987760639] [2021-02-19 17:50:50,935 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 [2021-02-19 17:50:50,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:50:50,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:50:50,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:50:50,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:50:51,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:51,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:51,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:50:51,241 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:51,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:51,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:51,248 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 15 treesize of output 11 [2021-02-19 17:50:51,250 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:51,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:51,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:51,257 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 17 treesize of output 13 [2021-02-19 17:50:51,260 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:51,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:51,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:50:51,269 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:51,358 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-02-19 17:50:51,358 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:50:51,359 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:50:51,360 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-02-19 17:50:51,461 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:51,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:50:51,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:50:51,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626283587] [2021-02-19 17:50:51,462 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:50:51,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:50:51,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:50:51,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:50:51,462 INFO L87 Difference]: Start difference. First operand 159 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) [2021-02-19 17:50:52,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:50:52,897 INFO L93 Difference]: Finished difference Result 240 states and 497 transitions. [2021-02-19 17:50:52,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 17:50:52,899 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 [2021-02-19 17:50:52,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:50:52,900 INFO L225 Difference]: With dead ends: 240 [2021-02-19 17:50:52,900 INFO L226 Difference]: Without dead ends: 240 [2021-02-19 17:50:52,900 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2021-02-19 17:50:52,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-02-19 17:50:52,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 160. [2021-02-19 17:50:52,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.2264150943396226) internal successors, (354), 159 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) [2021-02-19 17:50:52,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 354 transitions. [2021-02-19 17:50:52,902 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 354 transitions. Word has length 19 [2021-02-19 17:50:52,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:50:52,902 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 354 transitions. [2021-02-19 17:50:52,902 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) [2021-02-19 17:50:52,902 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 354 transitions. [2021-02-19 17:50:52,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:50:52,902 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:50:52,902 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:50:53,102 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 304 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1533 [2021-02-19 17:50:53,103 INFO L428 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:50:53,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:50:53,103 INFO L82 PathProgramCache]: Analyzing trace with hash -143147688, now seen corresponding path program 304 times [2021-02-19 17:50:53,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:50:53,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344885963] [2021-02-19 17:50:53,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:50:53,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:50:53,328 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:53,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344885963] [2021-02-19 17:50:53,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933680232] [2021-02-19 17:50:53,329 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 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 [2021-02-19 17:50:53,347 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:50:53,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:50:53,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:50:53,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:50:53,612 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:53,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:50:53,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-02-19 17:50:53,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336852765] [2021-02-19 17:50:53,613 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:50:53,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:50:53,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:50:53,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:50:53,613 INFO L87 Difference]: Start difference. First operand 160 states and 354 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) [2021-02-19 17:50:54,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:50:54,205 INFO L93 Difference]: Finished difference Result 172 states and 372 transitions. [2021-02-19 17:50:54,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:50:54,207 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 [2021-02-19 17:50:54,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:50:54,208 INFO L225 Difference]: With dead ends: 172 [2021-02-19 17:50:54,208 INFO L226 Difference]: Without dead ends: 168 [2021-02-19 17:50:54,208 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:50:54,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-02-19 17:50:54,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 160. [2021-02-19 17:50:54,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.220125786163522) internal successors, (353), 159 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) [2021-02-19 17:50:54,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 353 transitions. [2021-02-19 17:50:54,209 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 353 transitions. Word has length 19 [2021-02-19 17:50:54,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:50:54,210 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 353 transitions. [2021-02-19 17:50:54,210 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) [2021-02-19 17:50:54,210 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 353 transitions. [2021-02-19 17:50:54,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:50:54,210 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:50:54,210 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:50:54,410 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1543 [2021-02-19 17:50:54,410 INFO L428 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:50:54,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:50:54,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1753116761, now seen corresponding path program 305 times [2021-02-19 17:50:54,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:50:54,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675000271] [2021-02-19 17:50:54,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:50:54,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:50:54,627 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:54,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675000271] [2021-02-19 17:50:54,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934850854] [2021-02-19 17:50:54,628 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 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 [2021-02-19 17:50:54,648 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 17:50:54,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:50:54,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:50:54,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:50:54,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:54,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:54,915 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 16 treesize of output 12 [2021-02-19 17:50:54,917 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:54,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:54,922 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 15 treesize of output 11 [2021-02-19 17:50:54,924 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:54,962 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-02-19 17:50:54,962 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:50:54,964 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:50:54,964 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-02-19 17:50:55,010 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:55,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:50:55,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:50:55,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149101604] [2021-02-19 17:50:55,011 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:50:55,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:50:55,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:50:55,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:50:55,011 INFO L87 Difference]: Start difference. First operand 160 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) [2021-02-19 17:50:55,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:50:55,914 INFO L93 Difference]: Finished difference Result 198 states and 423 transitions. [2021-02-19 17:50:55,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 17:50:55,915 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 [2021-02-19 17:50:55,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:50:55,915 INFO L225 Difference]: With dead ends: 198 [2021-02-19 17:50:55,915 INFO L226 Difference]: Without dead ends: 198 [2021-02-19 17:50:55,915 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:50:55,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-02-19 17:50:55,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 158. [2021-02-19 17:50:55,917 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) [2021-02-19 17:50:55,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 346 transitions. [2021-02-19 17:50:55,917 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 346 transitions. Word has length 19 [2021-02-19 17:50:55,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:50:55,917 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 346 transitions. [2021-02-19 17:50:55,917 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) [2021-02-19 17:50:55,917 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 346 transitions. [2021-02-19 17:50:55,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:50:55,917 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:50:55,917 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:50:56,118 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1547,306 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:50:56,118 INFO L428 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:50:56,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:50:56,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1829826980, now seen corresponding path program 306 times [2021-02-19 17:50:56,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:50:56,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618720092] [2021-02-19 17:50:56,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:50:56,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:50:56,334 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:56,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618720092] [2021-02-19 17:50:56,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287459056] [2021-02-19 17:50:56,334 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 [2021-02-19 17:50:56,352 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:50:56,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:50:56,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:50:56,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:50:56,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:56,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:56,702 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 [2021-02-19 17:50:56,705 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:56,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:56,711 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 [2021-02-19 17:50:56,713 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:56,758 INFO L628 ElimStorePlain]: treesize reduction 36, result has 29.4 percent of original size [2021-02-19 17:50:56,759 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:50:56,761 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:50:56,761 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-02-19 17:50:56,809 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:56,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:50:56,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:50:56,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949701209] [2021-02-19 17:50:56,809 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:50:56,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:50:56,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:50:56,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:50:56,810 INFO L87 Difference]: Start difference. First operand 158 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) [2021-02-19 17:50:57,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:50:57,301 INFO L93 Difference]: Finished difference Result 180 states and 389 transitions. [2021-02-19 17:50:57,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:50:57,303 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 [2021-02-19 17:50:57,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:50:57,303 INFO L225 Difference]: With dead ends: 180 [2021-02-19 17:50:57,303 INFO L226 Difference]: Without dead ends: 180 [2021-02-19 17:50:57,303 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:50:57,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-02-19 17:50:57,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 159. [2021-02-19 17:50:57,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.2025316455696204) internal successors, (348), 158 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) [2021-02-19 17:50:57,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 348 transitions. [2021-02-19 17:50:57,305 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 348 transitions. Word has length 19 [2021-02-19 17:50:57,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:50:57,305 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 348 transitions. [2021-02-19 17:50:57,305 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) [2021-02-19 17:50:57,305 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 348 transitions. [2021-02-19 17:50:57,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:50:57,305 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:50:57,305 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:50:57,506 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1551 [2021-02-19 17:50:57,506 INFO L428 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:50:57,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:50:57,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1763199880, now seen corresponding path program 307 times [2021-02-19 17:50:57,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:50:57,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238485645] [2021-02-19 17:50:57,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:50:57,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:50:57,728 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:57,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238485645] [2021-02-19 17:50:57,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942442497] [2021-02-19 17:50:57,728 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 [2021-02-19 17:50:57,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:50:57,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:50:57,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:50:58,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:58,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:58,178 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 17 treesize of output 13 [2021-02-19 17:50:58,181 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:58,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:58,186 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 [2021-02-19 17:50:58,189 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:58,228 INFO L628 ElimStorePlain]: treesize reduction 36, result has 29.4 percent of original size [2021-02-19 17:50:58,229 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:50:58,231 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:50:58,231 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-02-19 17:50:58,283 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:58,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:50:58,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:50:58,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120086700] [2021-02-19 17:50:58,284 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:50:58,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:50:58,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:50:58,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:50:58,284 INFO L87 Difference]: Start difference. First operand 159 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) [2021-02-19 17:50:59,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:50:59,161 INFO L93 Difference]: Finished difference Result 202 states and 433 transitions. [2021-02-19 17:50:59,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:50:59,162 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 [2021-02-19 17:50:59,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:50:59,162 INFO L225 Difference]: With dead ends: 202 [2021-02-19 17:50:59,162 INFO L226 Difference]: Without dead ends: 202 [2021-02-19 17:50:59,162 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2021-02-19 17:50:59,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-02-19 17:50:59,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 160. [2021-02-19 17:50:59,163 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) [2021-02-19 17:50:59,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 350 transitions. [2021-02-19 17:50:59,164 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 350 transitions. Word has length 19 [2021-02-19 17:50:59,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:50:59,164 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 350 transitions. [2021-02-19 17:50:59,164 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) [2021-02-19 17:50:59,164 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 350 transitions. [2021-02-19 17:50:59,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:50:59,164 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:50:59,164 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:50:59,364 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 308 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1553 [2021-02-19 17:50:59,365 INFO L428 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:50:59,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:50:59,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1602009308, now seen corresponding path program 308 times [2021-02-19 17:50:59,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:50:59,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361560007] [2021-02-19 17:50:59,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:50:59,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:50:59,581 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:59,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361560007] [2021-02-19 17:50:59,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411405088] [2021-02-19 17:50:59,582 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 [2021-02-19 17:50:59,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:50:59,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:50:59,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:50:59,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:51:00,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:00,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:00,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:51:00,043 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:00,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:00,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:51:00,051 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:00,099 INFO L628 ElimStorePlain]: treesize reduction 34, result has 30.6 percent of original size [2021-02-19 17:51:00,099 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:51:00,102 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:51:00,102 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-02-19 17:51:00,156 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:00,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:51:00,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:51:00,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636268085] [2021-02-19 17:51:00,157 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:51:00,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:51:00,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:51:00,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:51:00,157 INFO L87 Difference]: Start difference. First operand 160 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) [2021-02-19 17:51:00,515 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 31 [2021-02-19 17:51:00,813 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-02-19 17:51:01,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:51:01,543 INFO L93 Difference]: Finished difference Result 217 states and 463 transitions. [2021-02-19 17:51:01,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:51:01,546 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 [2021-02-19 17:51:01,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:51:01,546 INFO L225 Difference]: With dead ends: 217 [2021-02-19 17:51:01,546 INFO L226 Difference]: Without dead ends: 217 [2021-02-19 17:51:01,546 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:51:01,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-02-19 17:51:01,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 161. [2021-02-19 17:51:01,548 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) [2021-02-19 17:51:01,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 352 transitions. [2021-02-19 17:51:01,548 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 352 transitions. Word has length 19 [2021-02-19 17:51:01,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:51:01,548 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 352 transitions. [2021-02-19 17:51:01,548 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) [2021-02-19 17:51:01,548 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 352 transitions. [2021-02-19 17:51:01,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:51:01,548 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:51:01,548 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:51:01,749 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1555 [2021-02-19 17:51:01,749 INFO L428 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:51:01,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:51:01,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1253024596, now seen corresponding path program 309 times [2021-02-19 17:51:01,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:51:01,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311699214] [2021-02-19 17:51:01,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:51:01,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:51:01,992 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:01,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311699214] [2021-02-19 17:51:01,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327993586] [2021-02-19 17:51:01,993 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 [2021-02-19 17:51:02,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:51:02,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:51:02,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:51:02,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:51:02,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:02,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:02,407 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 18 treesize of output 14 [2021-02-19 17:51:02,410 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:02,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:02,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:51:02,419 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:02,559 WARN L202 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 27 [2021-02-19 17:51:02,560 INFO L628 ElimStorePlain]: treesize reduction 80, result has 35.0 percent of original size [2021-02-19 17:51:02,560 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:51:02,564 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 [2021-02-19 17:51:02,567 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:02,612 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:51:02,613 INFO L518 ElimStorePlain]: Eliminatee v_prenex_258 vanished before elimination [2021-02-19 17:51:02,616 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:51:02,617 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-02-19 17:51:02,746 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:02,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:51:02,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:51:02,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526861899] [2021-02-19 17:51:02,747 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:51:02,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:51:02,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:51:02,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:51:02,747 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) [2021-02-19 17:51:03,153 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 31 [2021-02-19 17:51:03,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:51:03,994 INFO L93 Difference]: Finished difference Result 216 states and 461 transitions. [2021-02-19 17:51:03,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:51:03,995 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 [2021-02-19 17:51:03,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:51:03,995 INFO L225 Difference]: With dead ends: 216 [2021-02-19 17:51:03,995 INFO L226 Difference]: Without dead ends: 216 [2021-02-19 17:51:03,995 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:51:03,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-02-19 17:51:03,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 162. [2021-02-19 17:51:03,997 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) [2021-02-19 17:51:03,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 354 transitions. [2021-02-19 17:51:03,997 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 354 transitions. Word has length 19 [2021-02-19 17:51:03,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:51:03,997 INFO L480 AbstractCegarLoop]: Abstraction has 162 states and 354 transitions. [2021-02-19 17:51:03,997 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) [2021-02-19 17:51:03,997 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 354 transitions. [2021-02-19 17:51:03,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:51:03,997 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:51:03,997 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:51:04,198 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1557 [2021-02-19 17:51:04,198 INFO L428 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:51:04,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:51:04,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1010924557, now seen corresponding path program 310 times [2021-02-19 17:51:04,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:51:04,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140814859] [2021-02-19 17:51:04,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:51:04,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:51:04,533 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:04,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140814859] [2021-02-19 17:51:04,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310560274] [2021-02-19 17:51:04,534 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 [2021-02-19 17:51:04,552 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:51:04,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:51:04,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:51:04,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:51:04,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:04,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:04,999 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 16 treesize of output 12 [2021-02-19 17:51:05,001 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:05,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:05,007 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 [2021-02-19 17:51:05,009 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:05,116 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 25 [2021-02-19 17:51:05,117 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-02-19 17:51:05,117 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:51:05,121 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 [2021-02-19 17:51:05,124 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:05,160 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:51:05,160 INFO L518 ElimStorePlain]: Eliminatee v_prenex_261 vanished before elimination [2021-02-19 17:51:05,162 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:51:05,162 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-02-19 17:51:05,251 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:05,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:51:05,251 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:51:05,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099866339] [2021-02-19 17:51:05,251 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:51:05,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:51:05,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:51:05,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:51:05,252 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) [2021-02-19 17:51:05,748 WARN L202 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-02-19 17:51:06,040 WARN L202 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2021-02-19 17:51:06,338 WARN L202 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2021-02-19 17:51:06,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:51:06,534 INFO L93 Difference]: Finished difference Result 176 states and 381 transitions. [2021-02-19 17:51:06,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:51:06,535 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 [2021-02-19 17:51:06,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:51:06,536 INFO L225 Difference]: With dead ends: 176 [2021-02-19 17:51:06,536 INFO L226 Difference]: Without dead ends: 176 [2021-02-19 17:51:06,536 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:51:06,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-02-19 17:51:06,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 157. [2021-02-19 17:51:06,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.2051282051282053) internal successors, (344), 156 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) [2021-02-19 17:51:06,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 344 transitions. [2021-02-19 17:51:06,538 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 344 transitions. Word has length 19 [2021-02-19 17:51:06,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:51:06,538 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 344 transitions. [2021-02-19 17:51:06,538 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) [2021-02-19 17:51:06,538 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 344 transitions. [2021-02-19 17:51:06,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:51:06,538 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:51:06,538 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:51:06,738 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 311 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1561 [2021-02-19 17:51:06,738 INFO L428 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:51:06,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:51:06,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1410006840, now seen corresponding path program 311 times [2021-02-19 17:51:06,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:51:06,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240758995] [2021-02-19 17:51:06,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:51:06,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:51:06,837 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:06,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240758995] [2021-02-19 17:51:06,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975025989] [2021-02-19 17:51:06,837 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 [2021-02-19 17:51:06,856 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:51:06,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:51:06,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:51:06,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:51:07,207 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:07,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:51:07,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:51:07,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929946951] [2021-02-19 17:51:07,208 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:51:07,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:51:07,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:51:07,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:51:07,208 INFO L87 Difference]: Start difference. First operand 157 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) [2021-02-19 17:51:07,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:51:07,788 INFO L93 Difference]: Finished difference Result 207 states and 443 transitions. [2021-02-19 17:51:07,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:51:07,790 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 [2021-02-19 17:51:07,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:51:07,790 INFO L225 Difference]: With dead ends: 207 [2021-02-19 17:51:07,790 INFO L226 Difference]: Without dead ends: 207 [2021-02-19 17:51:07,790 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:51:07,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-02-19 17:51:07,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 159. [2021-02-19 17:51:07,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.2025316455696204) internal successors, (348), 158 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) [2021-02-19 17:51:07,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 348 transitions. [2021-02-19 17:51:07,792 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 348 transitions. Word has length 19 [2021-02-19 17:51:07,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:51:07,792 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 348 transitions. [2021-02-19 17:51:07,792 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) [2021-02-19 17:51:07,792 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 348 transitions. [2021-02-19 17:51:07,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:51:07,793 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:51:07,793 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:51:07,993 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1568 [2021-02-19 17:51:07,993 INFO L428 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:51:07,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:51:07,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1571197412, now seen corresponding path program 312 times [2021-02-19 17:51:07,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:51:07,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585971468] [2021-02-19 17:51:07,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:51:07,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:51:08,090 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:08,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585971468] [2021-02-19 17:51:08,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338887332] [2021-02-19 17:51:08,091 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 [2021-02-19 17:51:08,109 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:51:08,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:51:08,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:51:08,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:51:08,483 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:08,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:51:08,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:51:08,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854743193] [2021-02-19 17:51:08,484 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:51:08,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:51:08,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:51:08,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:51:08,484 INFO L87 Difference]: Start difference. First operand 159 states and 348 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) [2021-02-19 17:51:09,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:51:09,405 INFO L93 Difference]: Finished difference Result 215 states and 459 transitions. [2021-02-19 17:51:09,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:51:09,406 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 [2021-02-19 17:51:09,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:51:09,406 INFO L225 Difference]: With dead ends: 215 [2021-02-19 17:51:09,406 INFO L226 Difference]: Without dead ends: 215 [2021-02-19 17:51:09,407 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:51:09,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-02-19 17:51:09,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 160. [2021-02-19 17:51:09,408 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) [2021-02-19 17:51:09,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 350 transitions. [2021-02-19 17:51:09,408 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 350 transitions. Word has length 19 [2021-02-19 17:51:09,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:51:09,408 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 350 transitions. [2021-02-19 17:51:09,408 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) [2021-02-19 17:51:09,408 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 350 transitions. [2021-02-19 17:51:09,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:51:09,409 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:51:09,409 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:51:09,609 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 313 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1572 [2021-02-19 17:51:09,609 INFO L428 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:51:09,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:51:09,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1920182124, now seen corresponding path program 313 times [2021-02-19 17:51:09,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:51:09,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945846862] [2021-02-19 17:51:09,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:51:09,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:51:09,837 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:09,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945846862] [2021-02-19 17:51:09,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398524516] [2021-02-19 17:51:09,838 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 [2021-02-19 17:51:09,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:51:09,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:51:09,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:51:10,421 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:10,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:51:10,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:51:10,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317637455] [2021-02-19 17:51:10,421 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:51:10,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:51:10,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:51:10,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:51:10,422 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) [2021-02-19 17:51:11,438 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-02-19 17:51:12,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:51:12,025 INFO L93 Difference]: Finished difference Result 225 states and 480 transitions. [2021-02-19 17:51:12,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 17:51:12,027 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 [2021-02-19 17:51:12,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:51:12,028 INFO L225 Difference]: With dead ends: 225 [2021-02-19 17:51:12,028 INFO L226 Difference]: Without dead ends: 225 [2021-02-19 17:51:12,028 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2021-02-19 17:51:12,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-02-19 17:51:12,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 161. [2021-02-19 17:51:12,030 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) [2021-02-19 17:51:12,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 352 transitions. [2021-02-19 17:51:12,030 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 352 transitions. Word has length 19 [2021-02-19 17:51:12,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:51:12,030 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 352 transitions. [2021-02-19 17:51:12,030 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) [2021-02-19 17:51:12,030 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 352 transitions. [2021-02-19 17:51:12,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:51:12,030 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:51:12,030 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:51:12,231 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1576 [2021-02-19 17:51:12,231 INFO L428 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:51:12,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:51:12,231 INFO L82 PathProgramCache]: Analyzing trace with hash 2132685133, now seen corresponding path program 314 times [2021-02-19 17:51:12,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:51:12,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089914724] [2021-02-19 17:51:12,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:51:12,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:51:12,351 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:12,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089914724] [2021-02-19 17:51:12,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897298374] [2021-02-19 17:51:12,351 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 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 [2021-02-19 17:51:12,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:51:12,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:51:12,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:51:12,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:51:12,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:12,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:12,661 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 17 treesize of output 13 [2021-02-19 17:51:12,663 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:12,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:12,670 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 18 treesize of output 14 [2021-02-19 17:51:12,672 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:12,792 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 33 [2021-02-19 17:51:12,793 INFO L628 ElimStorePlain]: treesize reduction 76, result has 40.2 percent of original size [2021-02-19 17:51:12,793 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:51:12,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:12,798 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 17 treesize of output 13 [2021-02-19 17:51:12,801 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:12,845 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:51:12,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:12,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:51:12,855 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:51:12,897 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:51:12,899 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:51:12,899 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:141, output treesize:22 [2021-02-19 17:51:13,017 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:13,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:51:13,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:51:13,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110403821] [2021-02-19 17:51:13,017 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:51:13,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:51:13,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:51:13,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:51:13,018 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) [2021-02-19 17:51:13,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:51:13,847 INFO L93 Difference]: Finished difference Result 184 states and 397 transitions. [2021-02-19 17:51:13,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:51:13,849 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 [2021-02-19 17:51:13,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:51:13,849 INFO L225 Difference]: With dead ends: 184 [2021-02-19 17:51:13,849 INFO L226 Difference]: Without dead ends: 184 [2021-02-19 17:51:13,849 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:51:13,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-02-19 17:51:13,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 157. [2021-02-19 17:51:13,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.2051282051282053) internal successors, (344), 156 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) [2021-02-19 17:51:13,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 344 transitions. [2021-02-19 17:51:13,851 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 344 transitions. Word has length 19 [2021-02-19 17:51:13,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:51:13,851 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 344 transitions. [2021-02-19 17:51:13,851 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) [2021-02-19 17:51:13,851 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 344 transitions. [2021-02-19 17:51:13,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:51:13,851 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:51:13,851 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:51:14,051 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 315 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1586 [2021-02-19 17:51:14,051 INFO L428 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:51:14,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:51:14,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1651577052, now seen corresponding path program 315 times [2021-02-19 17:51:14,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:51:14,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704554042] [2021-02-19 17:51:14,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:51:14,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:51:14,254 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:14,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704554042] [2021-02-19 17:51:14,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971527082] [2021-02-19 17:51:14,255 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 [2021-02-19 17:51:14,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:51:14,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:51:14,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:51:14,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:51:14,603 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:14,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:51:14,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:51:14,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681792096] [2021-02-19 17:51:14,604 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:51:14,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:51:14,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:51:14,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:51:14,604 INFO L87 Difference]: Start difference. First operand 157 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) [2021-02-19 17:51:15,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:51:15,300 INFO L93 Difference]: Finished difference Result 195 states and 419 transitions. [2021-02-19 17:51:15,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:51:15,301 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 [2021-02-19 17:51:15,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:51:15,301 INFO L225 Difference]: With dead ends: 195 [2021-02-19 17:51:15,301 INFO L226 Difference]: Without dead ends: 195 [2021-02-19 17:51:15,301 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:51:15,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-02-19 17:51:15,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 159. [2021-02-19 17:51:15,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.2025316455696204) internal successors, (348), 158 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) [2021-02-19 17:51:15,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 348 transitions. [2021-02-19 17:51:15,303 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 348 transitions. Word has length 19 [2021-02-19 17:51:15,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:51:15,303 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 348 transitions. [2021-02-19 17:51:15,303 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) [2021-02-19 17:51:15,303 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 348 transitions. [2021-02-19 17:51:15,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:51:15,303 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:51:15,303 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:51:15,504 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1592,316 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:51:15,504 INFO L428 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:51:15,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:51:15,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1302592340, now seen corresponding path program 316 times [2021-02-19 17:51:15,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:51:15,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989897115] [2021-02-19 17:51:15,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:51:15,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:51:15,721 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:15,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989897115] [2021-02-19 17:51:15,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100589347] [2021-02-19 17:51:15,721 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 [2021-02-19 17:51:15,739 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:51:15,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:51:15,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:51:15,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:51:16,174 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:16,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:51:16,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:51:16,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614847216] [2021-02-19 17:51:16,174 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:51:16,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:51:16,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:51:16,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:51:16,175 INFO L87 Difference]: Start difference. First operand 159 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) [2021-02-19 17:51:17,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:51:17,063 INFO L93 Difference]: Finished difference Result 211 states and 452 transitions. [2021-02-19 17:51:17,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:51:17,064 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 [2021-02-19 17:51:17,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:51:17,065 INFO L225 Difference]: With dead ends: 211 [2021-02-19 17:51:17,065 INFO L226 Difference]: Without dead ends: 211 [2021-02-19 17:51:17,065 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:51:17,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-02-19 17:51:17,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 160. [2021-02-19 17:51:17,066 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) [2021-02-19 17:51:17,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 350 transitions. [2021-02-19 17:51:17,067 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 350 transitions. Word has length 19 [2021-02-19 17:51:17,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:51:17,067 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 350 transitions. [2021-02-19 17:51:17,067 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) [2021-02-19 17:51:17,067 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 350 transitions. [2021-02-19 17:51:17,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:51:17,067 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:51:17,067 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:51:17,278 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 317 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1596 [2021-02-19 17:51:17,278 INFO L428 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:51:17,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:51:17,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1060492301, now seen corresponding path program 317 times [2021-02-19 17:51:17,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:51:17,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228394812] [2021-02-19 17:51:17,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:51:17,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:51:17,502 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:17,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228394812] [2021-02-19 17:51:17,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457942176] [2021-02-19 17:51:17,502 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 [2021-02-19 17:51:17,521 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 17:51:17,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:51:17,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:51:17,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:51:17,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:17,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:17,809 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 16 treesize of output 12 [2021-02-19 17:51:17,811 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:17,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:17,816 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 17 treesize of output 13 [2021-02-19 17:51:17,819 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:17,919 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-02-19 17:51:17,919 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:51:17,923 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 [2021-02-19 17:51:17,926 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:17,958 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:51:17,958 INFO L518 ElimStorePlain]: Eliminatee v_prenex_268 vanished before elimination [2021-02-19 17:51:17,960 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:51:17,960 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-02-19 17:51:18,056 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:18,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:51:18,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:51:18,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384133573] [2021-02-19 17:51:18,057 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:51:18,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:51:18,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:51:18,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:51:18,057 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) [2021-02-19 17:51:18,893 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-02-19 17:51:19,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:51:19,083 INFO L93 Difference]: Finished difference Result 185 states and 399 transitions. [2021-02-19 17:51:19,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:51:19,084 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 [2021-02-19 17:51:19,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:51:19,085 INFO L225 Difference]: With dead ends: 185 [2021-02-19 17:51:19,085 INFO L226 Difference]: Without dead ends: 185 [2021-02-19 17:51:19,085 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:51:19,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-02-19 17:51:19,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 158. [2021-02-19 17:51:19,086 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) [2021-02-19 17:51:19,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 346 transitions. [2021-02-19 17:51:19,087 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 346 transitions. Word has length 19 [2021-02-19 17:51:19,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:51:19,087 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 346 transitions. [2021-02-19 17:51:19,087 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) [2021-02-19 17:51:19,087 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 346 transitions. [2021-02-19 17:51:19,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:51:19,087 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:51:19,087 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:51:19,287 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1608,318 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:51:19,287 INFO L428 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:51:19,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:51:19,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1890337662, now seen corresponding path program 318 times [2021-02-19 17:51:19,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:51:19,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118745911] [2021-02-19 17:51:19,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:51:19,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:51:19,509 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:19,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118745911] [2021-02-19 17:51:19,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414854918] [2021-02-19 17:51:19,509 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 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 [2021-02-19 17:51:19,528 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:51:19,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:51:19,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:51:19,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:51:19,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:19,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:19,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:51:19,761 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:19,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:19,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:19,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:51:19,770 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:19,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:19,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:19,776 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 [2021-02-19 17:51:19,778 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:19,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:19,783 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 17 treesize of output 13 [2021-02-19 17:51:19,786 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:19,880 INFO L628 ElimStorePlain]: treesize reduction 79, result has 30.1 percent of original size [2021-02-19 17:51:19,880 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:51:19,883 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:51:19,883 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:133, output treesize:22 [2021-02-19 17:51:19,988 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:19,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:51:19,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:51:19,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055678380] [2021-02-19 17:51:19,988 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:51:19,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:51:19,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:51:19,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:51:19,989 INFO L87 Difference]: Start difference. First operand 158 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) [2021-02-19 17:51:20,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:51:20,894 INFO L93 Difference]: Finished difference Result 195 states and 412 transitions. [2021-02-19 17:51:20,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:51:20,895 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 [2021-02-19 17:51:20,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:51:20,896 INFO L225 Difference]: With dead ends: 195 [2021-02-19 17:51:20,896 INFO L226 Difference]: Without dead ends: 195 [2021-02-19 17:51:20,896 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:51:20,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-02-19 17:51:20,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 160. [2021-02-19 17:51:20,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.207547169811321) internal successors, (351), 159 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:51:20,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 351 transitions. [2021-02-19 17:51:20,898 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 351 transitions. Word has length 19 [2021-02-19 17:51:20,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:51:20,898 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 351 transitions. [2021-02-19 17:51:20,898 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) [2021-02-19 17:51:20,898 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 351 transitions. [2021-02-19 17:51:20,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:51:20,898 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:51:20,898 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:51:21,098 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1615 [2021-02-19 17:51:21,098 INFO L428 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:51:21,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:51:21,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1648237623, now seen corresponding path program 319 times [2021-02-19 17:51:21,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:51:21,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867384360] [2021-02-19 17:51:21,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:51:21,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:51:21,303 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:21,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867384360] [2021-02-19 17:51:21,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212747373] [2021-02-19 17:51:21,303 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 [2021-02-19 17:51:21,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:51:21,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:51:21,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:51:21,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:21,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:21,558 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 15 treesize of output 11 [2021-02-19 17:51:21,559 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:21,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:21,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:21,563 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 16 treesize of output 12 [2021-02-19 17:51:21,564 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:21,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:21,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:21,568 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 17 treesize of output 13 [2021-02-19 17:51:21,569 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:21,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:21,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:51:21,574 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:21,617 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-02-19 17:51:21,617 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:51:21,618 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:51:21,618 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-02-19 17:51:21,668 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:21,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:51:21,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:51:21,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650861881] [2021-02-19 17:51:21,668 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:51:21,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:51:21,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:51:21,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:51:21,669 INFO L87 Difference]: Start difference. First operand 160 states and 351 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) [2021-02-19 17:51:23,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:51:23,070 INFO L93 Difference]: Finished difference Result 240 states and 497 transitions. [2021-02-19 17:51:23,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 17:51:23,071 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 [2021-02-19 17:51:23,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:51:23,072 INFO L225 Difference]: With dead ends: 240 [2021-02-19 17:51:23,072 INFO L226 Difference]: Without dead ends: 240 [2021-02-19 17:51:23,072 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=147, Invalid=909, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 17:51:23,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-02-19 17:51:23,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 161. [2021-02-19 17:51:23,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.225) internal successors, (356), 160 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) [2021-02-19 17:51:23,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 356 transitions. [2021-02-19 17:51:23,074 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 356 transitions. Word has length 19 [2021-02-19 17:51:23,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:51:23,074 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 356 transitions. [2021-02-19 17:51:23,074 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) [2021-02-19 17:51:23,074 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 356 transitions. [2021-02-19 17:51:23,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:51:23,074 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:51:23,074 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:51:23,274 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1619,320 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:51:23,275 INFO L428 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:51:23,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:51:23,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1571990402, now seen corresponding path program 320 times [2021-02-19 17:51:23,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:51:23,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210065624] [2021-02-19 17:51:23,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:51:23,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:51:23,490 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:23,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210065624] [2021-02-19 17:51:23,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933072691] [2021-02-19 17:51:23,490 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 [2021-02-19 17:51:23,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:51:23,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:51:23,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:51:23,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:51:23,813 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:23,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:51:23,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:51:23,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623672289] [2021-02-19 17:51:23,814 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:51:23,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:51:23,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:51:23,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:51:23,814 INFO L87 Difference]: Start difference. First operand 161 states and 356 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) [2021-02-19 17:51:24,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:51:24,480 INFO L93 Difference]: Finished difference Result 170 states and 369 transitions. [2021-02-19 17:51:24,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:51:24,482 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 [2021-02-19 17:51:24,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:51:24,483 INFO L225 Difference]: With dead ends: 170 [2021-02-19 17:51:24,483 INFO L226 Difference]: Without dead ends: 166 [2021-02-19 17:51:24,483 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:51:24,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-02-19 17:51:24,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 161. [2021-02-19 17:51:24,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.21875) internal successors, (355), 160 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:51:24,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 355 transitions. [2021-02-19 17:51:24,484 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 355 transitions. Word has length 19 [2021-02-19 17:51:24,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:51:24,485 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 355 transitions. [2021-02-19 17:51:24,485 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) [2021-02-19 17:51:24,485 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 355 transitions. [2021-02-19 17:51:24,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:51:24,485 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:51:24,485 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:51:24,685 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1631,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:51:24,685 INFO L428 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:51:24,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:51:24,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1113007821, now seen corresponding path program 321 times [2021-02-19 17:51:24,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:51:24,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026857628] [2021-02-19 17:51:24,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:51:24,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:51:24,906 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:24,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026857628] [2021-02-19 17:51:24,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313290516] [2021-02-19 17:51:24,906 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 [2021-02-19 17:51:24,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:51:24,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:51:24,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:51:24,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:51:25,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:25,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:25,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:51:25,213 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:25,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:25,218 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 16 treesize of output 12 [2021-02-19 17:51:25,221 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:25,257 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-02-19 17:51:25,257 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:51:25,259 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:51:25,259 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-02-19 17:51:25,305 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:25,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:51:25,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:51:25,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370113563] [2021-02-19 17:51:25,306 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:51:25,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:51:25,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:51:25,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:51:25,306 INFO L87 Difference]: Start difference. First operand 161 states and 355 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) [2021-02-19 17:51:26,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:51:26,007 INFO L93 Difference]: Finished difference Result 193 states and 414 transitions. [2021-02-19 17:51:26,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:51:26,009 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 [2021-02-19 17:51:26,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:51:26,009 INFO L225 Difference]: With dead ends: 193 [2021-02-19 17:51:26,009 INFO L226 Difference]: Without dead ends: 193 [2021-02-19 17:51:26,009 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:51:26,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-02-19 17:51:26,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 157. [2021-02-19 17:51:26,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.2051282051282053) internal successors, (344), 156 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) [2021-02-19 17:51:26,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 344 transitions. [2021-02-19 17:51:26,011 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 344 transitions. Word has length 19 [2021-02-19 17:51:26,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:51:26,011 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 344 transitions. [2021-02-19 17:51:26,011 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) [2021-02-19 17:51:26,011 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 344 transitions. [2021-02-19 17:51:26,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:51:26,011 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:51:26,011 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:51:26,211 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1635 [2021-02-19 17:51:26,212 INFO L428 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:51:26,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:51:26,212 INFO L82 PathProgramCache]: Analyzing trace with hash -1159156152, now seen corresponding path program 322 times [2021-02-19 17:51:26,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:51:26,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344148929] [2021-02-19 17:51:26,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:51:26,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:51:26,464 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:26,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344148929] [2021-02-19 17:51:26,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508956904] [2021-02-19 17:51:26,464 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 [2021-02-19 17:51:26,482 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:51:26,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:51:26,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:51:26,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:51:26,830 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:26,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:51:26,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:51:26,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471563797] [2021-02-19 17:51:26,830 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:51:26,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:51:26,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:51:26,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:51:26,831 INFO L87 Difference]: Start difference. First operand 157 states and 344 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) [2021-02-19 17:51:27,712 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-02-19 17:51:27,912 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-02-19 17:51:28,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:51:28,070 INFO L93 Difference]: Finished difference Result 200 states and 421 transitions. [2021-02-19 17:51:28,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:51:28,072 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 [2021-02-19 17:51:28,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:51:28,072 INFO L225 Difference]: With dead ends: 200 [2021-02-19 17:51:28,072 INFO L226 Difference]: Without dead ends: 200 [2021-02-19 17:51:28,073 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:51:28,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-02-19 17:51:28,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 159. [2021-02-19 17:51:28,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.2151898734177213) internal successors, (350), 158 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) [2021-02-19 17:51:28,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 350 transitions. [2021-02-19 17:51:28,074 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 350 transitions. Word has length 19 [2021-02-19 17:51:28,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:51:28,074 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 350 transitions. [2021-02-19 17:51:28,075 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) [2021-02-19 17:51:28,075 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 350 transitions. [2021-02-19 17:51:28,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:51:28,075 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:51:28,075 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:51:28,275 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1639,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:51:28,275 INFO L428 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:51:28,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:51:28,276 INFO L82 PathProgramCache]: Analyzing trace with hash -1997976649, now seen corresponding path program 323 times [2021-02-19 17:51:28,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:51:28,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623743531] [2021-02-19 17:51:28,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:51:28,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:51:28,478 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:28,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623743531] [2021-02-19 17:51:28,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817237494] [2021-02-19 17:51:28,479 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 [2021-02-19 17:51:28,498 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:51:28,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:51:28,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:51:28,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:51:28,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:28,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:28,822 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 16 treesize of output 12 [2021-02-19 17:51:28,825 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:28,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:28,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:28,831 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 [2021-02-19 17:51:28,837 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:28,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:28,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:28,843 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 16 treesize of output 12 [2021-02-19 17:51:28,845 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:28,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:28,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:51:28,854 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:28,942 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-02-19 17:51:28,942 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:51:28,944 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:51:28,944 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-02-19 17:51:29,022 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:29,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:51:29,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:51:29,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636003529] [2021-02-19 17:51:29,023 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:51:29,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:51:29,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:51:29,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:51:29,023 INFO L87 Difference]: Start difference. First operand 159 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) [2021-02-19 17:51:30,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:51:30,501 INFO L93 Difference]: Finished difference Result 223 states and 466 transitions. [2021-02-19 17:51:30,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 17:51:30,503 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 [2021-02-19 17:51:30,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:51:30,504 INFO L225 Difference]: With dead ends: 223 [2021-02-19 17:51:30,504 INFO L226 Difference]: Without dead ends: 220 [2021-02-19 17:51:30,504 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=132, Invalid=798, Unknown=0, NotChecked=0, Total=930 [2021-02-19 17:51:30,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-02-19 17:51:30,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 166. [2021-02-19 17:51:30,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 2.224242424242424) internal successors, (367), 165 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:51:30,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 367 transitions. [2021-02-19 17:51:30,506 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 367 transitions. Word has length 19 [2021-02-19 17:51:30,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:51:30,506 INFO L480 AbstractCegarLoop]: Abstraction has 166 states and 367 transitions. [2021-02-19 17:51:30,506 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) [2021-02-19 17:51:30,506 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 367 transitions. [2021-02-19 17:51:30,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:51:30,506 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:51:30,506 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:51:30,707 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1649 [2021-02-19 17:51:30,707 INFO L428 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:51:30,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:51:30,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1606493875, now seen corresponding path program 324 times [2021-02-19 17:51:30,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:51:30,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661814948] [2021-02-19 17:51:30,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:51:30,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:51:30,947 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:30,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661814948] [2021-02-19 17:51:30,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807386489] [2021-02-19 17:51:30,947 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 [2021-02-19 17:51:30,966 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:51:30,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:51:30,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:51:30,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:51:31,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:31,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:31,249 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 18 treesize of output 14 [2021-02-19 17:51:31,252 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:31,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:31,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:31,259 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 17 treesize of output 13 [2021-02-19 17:51:31,261 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:31,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:31,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:31,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:51:31,271 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:31,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:31,276 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 17 treesize of output 13 [2021-02-19 17:51:31,279 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:31,402 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2021-02-19 17:51:31,403 INFO L628 ElimStorePlain]: treesize reduction 69, result has 38.9 percent of original size [2021-02-19 17:51:31,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:31,409 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 9 treesize of output 5 [2021-02-19 17:51:31,414 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:51:31,455 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:51:31,457 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:51:31,458 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:141, output treesize:22 [2021-02-19 17:51:31,584 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:31,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:51:31,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:51:31,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863272463] [2021-02-19 17:51:31,584 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:51:31,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:51:31,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:51:31,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:51:31,585 INFO L87 Difference]: Start difference. First operand 166 states and 367 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) [2021-02-19 17:51:33,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:51:33,420 INFO L93 Difference]: Finished difference Result 239 states and 499 transitions. [2021-02-19 17:51:33,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 17:51:33,421 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 [2021-02-19 17:51:33,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:51:33,422 INFO L225 Difference]: With dead ends: 239 [2021-02-19 17:51:33,422 INFO L226 Difference]: Without dead ends: 239 [2021-02-19 17:51:33,422 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=163, Invalid=959, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 17:51:33,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-02-19 17:51:33,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 165. [2021-02-19 17:51:33,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 2.225609756097561) internal successors, (365), 164 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:51:33,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 365 transitions. [2021-02-19 17:51:33,424 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 365 transitions. Word has length 19 [2021-02-19 17:51:33,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:51:33,424 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 365 transitions. [2021-02-19 17:51:33,424 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) [2021-02-19 17:51:33,424 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 365 transitions. [2021-02-19 17:51:33,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:51:33,424 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:51:33,424 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:51:33,624 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 325 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1660 [2021-02-19 17:51:33,625 INFO L428 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:51:33,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:51:33,625 INFO L82 PathProgramCache]: Analyzing trace with hash -531754604, now seen corresponding path program 325 times [2021-02-19 17:51:33,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:51:33,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530912562] [2021-02-19 17:51:33,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:51:33,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:51:33,867 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:33,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530912562] [2021-02-19 17:51:33,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783201287] [2021-02-19 17:51:33,868 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 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 [2021-02-19 17:51:33,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:51:33,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:51:33,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:51:34,061 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:34,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:51:34,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:51:34,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037610813] [2021-02-19 17:51:34,061 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:51:34,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:51:34,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:51:34,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:51:34,062 INFO L87 Difference]: Start difference. First operand 165 states and 365 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) [2021-02-19 17:51:34,811 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-02-19 17:51:34,973 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-02-19 17:51:35,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:51:35,211 INFO L93 Difference]: Finished difference Result 178 states and 384 transitions. [2021-02-19 17:51:35,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:51:35,212 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 [2021-02-19 17:51:35,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:51:35,212 INFO L225 Difference]: With dead ends: 178 [2021-02-19 17:51:35,213 INFO L226 Difference]: Without dead ends: 174 [2021-02-19 17:51:35,213 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:51:35,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-02-19 17:51:35,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 165. [2021-02-19 17:51:35,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 2.2195121951219514) internal successors, (364), 164 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:51:35,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 364 transitions. [2021-02-19 17:51:35,214 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 364 transitions. Word has length 19 [2021-02-19 17:51:35,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:51:35,214 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 364 transitions. [2021-02-19 17:51:35,214 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) [2021-02-19 17:51:35,214 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 364 transitions. [2021-02-19 17:51:35,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:51:35,215 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:51:35,215 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:51:35,415 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1663 [2021-02-19 17:51:35,415 INFO L428 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:51:35,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:51:35,415 INFO L82 PathProgramCache]: Analyzing trace with hash -2141723677, now seen corresponding path program 326 times [2021-02-19 17:51:35,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:51:35,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361116967] [2021-02-19 17:51:35,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:51:35,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:51:35,594 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:35,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361116967] [2021-02-19 17:51:35,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922681732] [2021-02-19 17:51:35,595 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 [2021-02-19 17:51:35,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:51:35,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:51:35,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:51:35,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:51:35,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:35,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:35,889 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 17 treesize of output 13 [2021-02-19 17:51:35,891 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:35,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:35,896 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 17 treesize of output 13 [2021-02-19 17:51:35,898 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:35,951 INFO L628 ElimStorePlain]: treesize reduction 30, result has 43.4 percent of original size [2021-02-19 17:51:35,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:35,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:51:35,959 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:51:35,972 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:51:35,974 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:51:35,974 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:67, output treesize:9 [2021-02-19 17:51:36,024 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:36,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:51:36,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:51:36,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203955382] [2021-02-19 17:51:36,024 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:51:36,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:51:36,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:51:36,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:51:36,025 INFO L87 Difference]: Start difference. First operand 165 states and 364 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) [2021-02-19 17:51:37,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:51:37,198 INFO L93 Difference]: Finished difference Result 208 states and 442 transitions. [2021-02-19 17:51:37,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:51:37,200 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 [2021-02-19 17:51:37,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:51:37,200 INFO L225 Difference]: With dead ends: 208 [2021-02-19 17:51:37,200 INFO L226 Difference]: Without dead ends: 208 [2021-02-19 17:51:37,200 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2021-02-19 17:51:37,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-02-19 17:51:37,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 164. [2021-02-19 17:51:37,202 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) [2021-02-19 17:51:37,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 362 transitions. [2021-02-19 17:51:37,202 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 362 transitions. Word has length 19 [2021-02-19 17:51:37,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:51:37,202 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 362 transitions. [2021-02-19 17:51:37,202 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) [2021-02-19 17:51:37,202 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 362 transitions. [2021-02-19 17:51:37,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:51:37,202 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:51:37,202 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:51:37,402 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 327 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1667 [2021-02-19 17:51:37,403 INFO L428 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:51:37,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:51:37,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1656428572, now seen corresponding path program 327 times [2021-02-19 17:51:37,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:51:37,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084051378] [2021-02-19 17:51:37,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:51:37,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:51:37,625 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:37,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084051378] [2021-02-19 17:51:37,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053369477] [2021-02-19 17:51:37,625 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 [2021-02-19 17:51:37,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:51:37,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:51:37,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:51:37,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:51:37,948 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:37,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:51:37,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:51:37,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477506813] [2021-02-19 17:51:37,948 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:51:37,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:51:37,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:51:37,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:51:37,949 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) [2021-02-19 17:51:38,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:51:38,602 INFO L93 Difference]: Finished difference Result 175 states and 378 transitions. [2021-02-19 17:51:38,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:51:38,604 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 [2021-02-19 17:51:38,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:51:38,604 INFO L225 Difference]: With dead ends: 175 [2021-02-19 17:51:38,604 INFO L226 Difference]: Without dead ends: 169 [2021-02-19 17:51:38,604 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:51:38,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-02-19 17:51:38,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 164. [2021-02-19 17:51:38,605 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) [2021-02-19 17:51:38,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 361 transitions. [2021-02-19 17:51:38,606 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 361 transitions. Word has length 19 [2021-02-19 17:51:38,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:51:38,606 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 361 transitions. [2021-02-19 17:51:38,606 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) [2021-02-19 17:51:38,606 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 361 transitions. [2021-02-19 17:51:38,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:51:38,606 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:51:38,606 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:51:38,806 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1668,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:51:38,807 INFO L428 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:51:38,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:51:38,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1553978355, now seen corresponding path program 328 times [2021-02-19 17:51:38,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:51:38,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815730186] [2021-02-19 17:51:38,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:51:38,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:51:38,984 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:38,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815730186] [2021-02-19 17:51:38,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019369560] [2021-02-19 17:51:38,985 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 [2021-02-19 17:51:39,002 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:51:39,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:51:39,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:51:39,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:51:39,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:39,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:39,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:51:39,253 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:39,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:39,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:51:39,261 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:39,308 INFO L628 ElimStorePlain]: treesize reduction 30, result has 43.4 percent of original size [2021-02-19 17:51:39,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:39,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:51:39,315 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:51:39,327 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:51:39,329 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:51:39,329 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:67, output treesize:9 [2021-02-19 17:51:39,377 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:39,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:51:39,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:51:39,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782626238] [2021-02-19 17:51:39,377 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:51:39,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:51:39,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:51:39,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:51:39,378 INFO L87 Difference]: Start difference. First operand 164 states and 361 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) [2021-02-19 17:51:39,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:51:39,847 INFO L93 Difference]: Finished difference Result 192 states and 412 transitions. [2021-02-19 17:51:39,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:51:39,848 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 [2021-02-19 17:51:39,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:51:39,848 INFO L225 Difference]: With dead ends: 192 [2021-02-19 17:51:39,848 INFO L226 Difference]: Without dead ends: 192 [2021-02-19 17:51:39,848 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:51:39,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-02-19 17:51:39,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 158. [2021-02-19 17:51:39,850 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) [2021-02-19 17:51:39,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 346 transitions. [2021-02-19 17:51:39,850 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 346 transitions. Word has length 19 [2021-02-19 17:51:39,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:51:39,850 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 346 transitions. [2021-02-19 17:51:39,850 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) [2021-02-19 17:51:39,850 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 346 transitions. [2021-02-19 17:51:39,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:51:39,850 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:51:39,850 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:51:40,050 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1672 [2021-02-19 17:51:40,051 INFO L428 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:51:40,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:51:40,051 INFO L82 PathProgramCache]: Analyzing trace with hash 705849654, now seen corresponding path program 329 times [2021-02-19 17:51:40,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:51:40,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218383886] [2021-02-19 17:51:40,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:51:40,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:51:40,252 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:40,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218383886] [2021-02-19 17:51:40,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271111976] [2021-02-19 17:51:40,253 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 [2021-02-19 17:51:40,272 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:51:40,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:51:40,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:51:40,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:51:40,690 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:40,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:51:40,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:51:40,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976431384] [2021-02-19 17:51:40,690 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:51:40,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:51:40,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:51:40,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:51:40,691 INFO L87 Difference]: Start difference. First operand 158 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) [2021-02-19 17:51:41,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:51:41,098 INFO L93 Difference]: Finished difference Result 178 states and 386 transitions. [2021-02-19 17:51:41,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:51:41,100 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 [2021-02-19 17:51:41,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:51:41,100 INFO L225 Difference]: With dead ends: 178 [2021-02-19 17:51:41,100 INFO L226 Difference]: Without dead ends: 178 [2021-02-19 17:51:41,100 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:51:41,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-02-19 17:51:41,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 159. [2021-02-19 17:51:41,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.2025316455696204) internal successors, (348), 158 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) [2021-02-19 17:51:41,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 348 transitions. [2021-02-19 17:51:41,102 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 348 transitions. Word has length 19 [2021-02-19 17:51:41,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:51:41,102 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 348 transitions. [2021-02-19 17:51:41,102 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) [2021-02-19 17:51:41,102 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 348 transitions. [2021-02-19 17:51:41,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:51:41,102 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:51:41,102 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:51:41,302 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 330 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1673 [2021-02-19 17:51:41,303 INFO L428 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:51:41,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:51:41,303 INFO L82 PathProgramCache]: Analyzing trace with hash 3909218, now seen corresponding path program 330 times [2021-02-19 17:51:41,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:51:41,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532595306] [2021-02-19 17:51:41,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:51:41,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:51:41,518 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:41,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532595306] [2021-02-19 17:51:41,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606659047] [2021-02-19 17:51:41,519 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 [2021-02-19 17:51:41,537 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:51:41,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:51:41,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:51:41,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:51:41,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:41,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:41,977 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 17 treesize of output 13 [2021-02-19 17:51:41,980 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:41,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:41,985 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 17 treesize of output 13 [2021-02-19 17:51:41,987 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:42,031 INFO L628 ElimStorePlain]: treesize reduction 36, result has 29.4 percent of original size [2021-02-19 17:51:42,032 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:51:42,034 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:51:42,034 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-02-19 17:51:42,085 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:42,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:51:42,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-02-19 17:51:42,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863159146] [2021-02-19 17:51:42,085 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:51:42,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:51:42,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:51:42,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:51:42,086 INFO L87 Difference]: Start difference. First operand 159 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) [2021-02-19 17:51:43,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:51:43,102 INFO L93 Difference]: Finished difference Result 200 states and 430 transitions. [2021-02-19 17:51:43,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:51:43,104 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 [2021-02-19 17:51:43,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:51:43,105 INFO L225 Difference]: With dead ends: 200 [2021-02-19 17:51:43,105 INFO L226 Difference]: Without dead ends: 200 [2021-02-19 17:51:43,105 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:51:43,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-02-19 17:51:43,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 160. [2021-02-19 17:51:43,106 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) [2021-02-19 17:51:43,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 350 transitions. [2021-02-19 17:51:43,107 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 350 transitions. Word has length 19 [2021-02-19 17:51:43,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:51:43,107 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 350 transitions. [2021-02-19 17:51:43,107 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) [2021-02-19 17:51:43,107 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 350 transitions. [2021-02-19 17:51:43,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:51:43,107 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:51:43,107 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:51:43,307 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1677 [2021-02-19 17:51:43,307 INFO L428 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:51:43,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:51:43,308 INFO L82 PathProgramCache]: Analyzing trace with hash -157281354, now seen corresponding path program 331 times [2021-02-19 17:51:43,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:51:43,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978606716] [2021-02-19 17:51:43,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:51:43,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:51:43,550 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:43,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978606716] [2021-02-19 17:51:43,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842387130] [2021-02-19 17:51:43,551 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 [2021-02-19 17:51:43,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:51:43,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:51:43,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:51:43,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:43,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:43,963 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 17 treesize of output 13 [2021-02-19 17:51:43,964 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:43,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:43,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:51:43,968 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:43,988 INFO L628 ElimStorePlain]: treesize reduction 36, result has 29.4 percent of original size [2021-02-19 17:51:43,988 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:51:43,989 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:51:43,989 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-02-19 17:51:44,014 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:44,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:51:44,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-02-19 17:51:44,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526312788] [2021-02-19 17:51:44,014 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:51:44,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:51:44,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:51:44,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:51:44,015 INFO L87 Difference]: Start difference. First operand 160 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) [2021-02-19 17:51:44,407 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2021-02-19 17:51:44,777 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-02-19 17:51:45,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:51:45,355 INFO L93 Difference]: Finished difference Result 206 states and 442 transitions. [2021-02-19 17:51:45,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:51:45,357 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 [2021-02-19 17:51:45,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:51:45,357 INFO L225 Difference]: With dead ends: 206 [2021-02-19 17:51:45,358 INFO L226 Difference]: Without dead ends: 206 [2021-02-19 17:51:45,358 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:51:45,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-02-19 17:51:45,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 161. [2021-02-19 17:51:45,359 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) [2021-02-19 17:51:45,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 352 transitions. [2021-02-19 17:51:45,359 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 352 transitions. Word has length 19 [2021-02-19 17:51:45,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:51:45,359 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 352 transitions. [2021-02-19 17:51:45,359 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) [2021-02-19 17:51:45,359 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 352 transitions. [2021-02-19 17:51:45,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:51:45,360 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:51:45,360 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:51:45,560 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1679,332 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:51:45,560 INFO L428 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:51:45,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:51:45,560 INFO L82 PathProgramCache]: Analyzing trace with hash -506266066, now seen corresponding path program 332 times [2021-02-19 17:51:45,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:51:45,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616002606] [2021-02-19 17:51:45,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:51:45,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:51:45,790 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:45,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616002606] [2021-02-19 17:51:45,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980757542] [2021-02-19 17:51:45,791 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 [2021-02-19 17:51:45,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:51:45,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:51:45,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:51:45,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:51:46,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:46,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:46,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:51:46,225 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:46,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:46,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:51:46,233 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:46,359 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 27 [2021-02-19 17:51:46,360 INFO L628 ElimStorePlain]: treesize reduction 78, result has 35.5 percent of original size [2021-02-19 17:51:46,360 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:51:46,364 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 [2021-02-19 17:51:46,366 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:46,409 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:51:46,409 INFO L518 ElimStorePlain]: Eliminatee v_prenex_274 vanished before elimination [2021-02-19 17:51:46,412 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:51:46,412 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-02-19 17:51:46,526 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:46,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:51:46,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-02-19 17:51:46,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659128094] [2021-02-19 17:51:46,527 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:51:46,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:51:46,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:51:46,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:51:46,527 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) [2021-02-19 17:51:46,955 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-02-19 17:51:47,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:51:47,827 INFO L93 Difference]: Finished difference Result 216 states and 462 transitions. [2021-02-19 17:51:47,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:51:47,828 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 [2021-02-19 17:51:47,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:51:47,828 INFO L225 Difference]: With dead ends: 216 [2021-02-19 17:51:47,828 INFO L226 Difference]: Without dead ends: 216 [2021-02-19 17:51:47,829 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2021-02-19 17:51:47,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-02-19 17:51:47,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 162. [2021-02-19 17:51:47,830 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) [2021-02-19 17:51:47,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 354 transitions. [2021-02-19 17:51:47,830 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 354 transitions. Word has length 19 [2021-02-19 17:51:47,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:51:47,830 INFO L480 AbstractCegarLoop]: Abstraction has 162 states and 354 transitions. [2021-02-19 17:51:47,830 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) [2021-02-19 17:51:47,831 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 354 transitions. [2021-02-19 17:51:47,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:51:47,831 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:51:47,831 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:51:48,031 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1681,333 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:51:48,031 INFO L428 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:51:48,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:51:48,031 INFO L82 PathProgramCache]: Analyzing trace with hash -748366105, now seen corresponding path program 333 times [2021-02-19 17:51:48,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:51:48,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084943553] [2021-02-19 17:51:48,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:51:48,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:51:48,344 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:48,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084943553] [2021-02-19 17:51:48,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011450249] [2021-02-19 17:51:48,344 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 [2021-02-19 17:51:48,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:51:48,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:51:48,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:51:48,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:51:48,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:48,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:48,827 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 [2021-02-19 17:51:48,830 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:48,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:48,836 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 15 treesize of output 11 [2021-02-19 17:51:48,838 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:48,940 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 26 [2021-02-19 17:51:48,941 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-02-19 17:51:48,941 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:51:48,945 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 [2021-02-19 17:51:48,948 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:48,983 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:51:48,983 INFO L518 ElimStorePlain]: Eliminatee v_prenex_277 vanished before elimination [2021-02-19 17:51:48,985 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:51:48,985 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-02-19 17:51:49,063 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:49,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:51:49,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:51:49,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715688578] [2021-02-19 17:51:49,063 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:51:49,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:51:49,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:51:49,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:51:49,064 INFO L87 Difference]: Start difference. First operand 162 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) [2021-02-19 17:51:49,627 WARN L202 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-02-19 17:51:49,952 WARN L202 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2021-02-19 17:51:50,237 WARN L202 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2021-02-19 17:51:50,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:51:50,355 INFO L93 Difference]: Finished difference Result 179 states and 388 transitions. [2021-02-19 17:51:50,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:51:50,357 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 [2021-02-19 17:51:50,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:51:50,358 INFO L225 Difference]: With dead ends: 179 [2021-02-19 17:51:50,358 INFO L226 Difference]: Without dead ends: 179 [2021-02-19 17:51:50,358 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:51:50,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-02-19 17:51:50,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 158. [2021-02-19 17:51:50,359 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) [2021-02-19 17:51:50,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 346 transitions. [2021-02-19 17:51:50,359 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 346 transitions. Word has length 19 [2021-02-19 17:51:50,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:51:50,360 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 346 transitions. [2021-02-19 17:51:50,360 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) [2021-02-19 17:51:50,360 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 346 transitions. [2021-02-19 17:51:50,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:51:50,360 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:51:50,360 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:51:50,560 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1685,334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:51:50,560 INFO L428 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:51:50,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:51:50,561 INFO L82 PathProgramCache]: Analyzing trace with hash -2108519412, now seen corresponding path program 334 times [2021-02-19 17:51:50,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:51:50,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959225878] [2021-02-19 17:51:50,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:51:50,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:51:50,770 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:50,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959225878] [2021-02-19 17:51:50,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084168588] [2021-02-19 17:51:50,770 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 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 [2021-02-19 17:51:50,788 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:51:50,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:51:50,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:51:50,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:51:51,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:51,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:51,026 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 17 treesize of output 13 [2021-02-19 17:51:51,027 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:51,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:51,030 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 17 treesize of output 13 [2021-02-19 17:51:51,031 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:51,056 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-02-19 17:51:51,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:51,059 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 9 treesize of output 5 [2021-02-19 17:51:51,060 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:51:51,067 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:51:51,068 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:51:51,068 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-02-19 17:51:51,093 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:51,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:51:51,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-02-19 17:51:51,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914214509] [2021-02-19 17:51:51,094 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:51:51,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:51:51,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:51:51,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:51:51,094 INFO L87 Difference]: Start difference. First operand 158 states and 346 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) [2021-02-19 17:51:51,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:51:51,595 INFO L93 Difference]: Finished difference Result 189 states and 408 transitions. [2021-02-19 17:51:51,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:51:51,597 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 [2021-02-19 17:51:51,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:51:51,597 INFO L225 Difference]: With dead ends: 189 [2021-02-19 17:51:51,597 INFO L226 Difference]: Without dead ends: 189 [2021-02-19 17:51:51,598 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:51:51,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-02-19 17:51:51,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 159. [2021-02-19 17:51:51,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.2025316455696204) internal successors, (348), 158 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) [2021-02-19 17:51:51,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 348 transitions. [2021-02-19 17:51:51,599 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 348 transitions. Word has length 19 [2021-02-19 17:51:51,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:51:51,599 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 348 transitions. [2021-02-19 17:51:51,599 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) [2021-02-19 17:51:51,599 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 348 transitions. [2021-02-19 17:51:51,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:51:51,599 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:51:51,599 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:51:51,800 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1692,335 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:51:51,800 INFO L428 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:51:51,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:51:51,800 INFO L82 PathProgramCache]: Analyzing trace with hash 2025257312, now seen corresponding path program 335 times [2021-02-19 17:51:51,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:51:51,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143403404] [2021-02-19 17:51:51,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:51:51,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:51:52,019 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:52,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143403404] [2021-02-19 17:51:52,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322260926] [2021-02-19 17:51:52,019 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 [2021-02-19 17:51:52,038 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 17:51:52,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:51:52,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:51:52,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:51:52,496 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:52,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:51:52,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:51:52,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326981442] [2021-02-19 17:51:52,496 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:51:52,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:51:52,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:51:52,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:51:52,497 INFO L87 Difference]: Start difference. First operand 159 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) [2021-02-19 17:51:53,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:51:53,564 INFO L93 Difference]: Finished difference Result 205 states and 440 transitions. [2021-02-19 17:51:53,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:51:53,566 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 [2021-02-19 17:51:53,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:51:53,566 INFO L225 Difference]: With dead ends: 205 [2021-02-19 17:51:53,566 INFO L226 Difference]: Without dead ends: 205 [2021-02-19 17:51:53,566 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:51:53,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-02-19 17:51:53,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 160. [2021-02-19 17:51:53,567 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) [2021-02-19 17:51:53,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 350 transitions. [2021-02-19 17:51:53,568 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 350 transitions. Word has length 19 [2021-02-19 17:51:53,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:51:53,568 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 350 transitions. [2021-02-19 17:51:53,568 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) [2021-02-19 17:51:53,568 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 350 transitions. [2021-02-19 17:51:53,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:51:53,568 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:51:53,568 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:51:53,768 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1694,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:51:53,769 INFO L428 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:51:53,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:51:53,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1676272600, now seen corresponding path program 336 times [2021-02-19 17:51:53,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:51:53,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234051791] [2021-02-19 17:51:53,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:51:53,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:51:53,969 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:53,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234051791] [2021-02-19 17:51:53,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85548122] [2021-02-19 17:51:53,970 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 [2021-02-19 17:51:53,988 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:51:53,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:51:53,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:51:53,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:51:54,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:54,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:54,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:51:54,357 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:54,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:54,363 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 18 treesize of output 14 [2021-02-19 17:51:54,365 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:54,498 WARN L202 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2021-02-19 17:51:54,499 INFO L628 ElimStorePlain]: treesize reduction 74, result has 39.8 percent of original size [2021-02-19 17:51:54,503 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 [2021-02-19 17:51:54,506 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:54,552 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:51:54,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:54,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:51:54,560 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:51:54,600 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:51:54,600 INFO L518 ElimStorePlain]: Eliminatee v_prenex_281 vanished before elimination [2021-02-19 17:51:54,604 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:51:54,604 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-02-19 17:51:54,720 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:54,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:51:54,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-02-19 17:51:54,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374008690] [2021-02-19 17:51:54,720 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:51:54,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:51:54,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:51:54,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:51:54,721 INFO L87 Difference]: Start difference. First operand 160 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) [2021-02-19 17:51:55,268 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 31 [2021-02-19 17:51:55,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:51:55,805 INFO L93 Difference]: Finished difference Result 224 states and 478 transitions. [2021-02-19 17:51:55,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:51:55,807 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 [2021-02-19 17:51:55,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:51:55,807 INFO L225 Difference]: With dead ends: 224 [2021-02-19 17:51:55,807 INFO L226 Difference]: Without dead ends: 224 [2021-02-19 17:51:55,807 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:51:55,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-02-19 17:51:55,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 161. [2021-02-19 17:51:55,809 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) [2021-02-19 17:51:55,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 352 transitions. [2021-02-19 17:51:55,809 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 352 transitions. Word has length 19 [2021-02-19 17:51:55,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:51:55,809 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 352 transitions. [2021-02-19 17:51:55,809 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) [2021-02-19 17:51:55,809 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 352 transitions. [2021-02-19 17:51:55,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:51:55,809 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:51:55,810 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:51:56,010 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 337 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1698 [2021-02-19 17:51:56,010 INFO L428 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:51:56,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:51:56,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1434172561, now seen corresponding path program 337 times [2021-02-19 17:51:56,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:51:56,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883984469] [2021-02-19 17:51:56,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:51:56,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:51:56,259 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:56,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883984469] [2021-02-19 17:51:56,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687306904] [2021-02-19 17:51:56,259 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 [2021-02-19 17:51:56,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:51:56,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:51:56,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:51:56,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:56,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:56,674 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 15 treesize of output 11 [2021-02-19 17:51:56,677 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:56,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:56,683 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 [2021-02-19 17:51:56,685 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:56,790 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 26 [2021-02-19 17:51:56,791 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-02-19 17:51:56,791 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:51:56,795 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 [2021-02-19 17:51:56,798 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:56,833 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:51:56,833 INFO L518 ElimStorePlain]: Eliminatee v_prenex_284 vanished before elimination [2021-02-19 17:51:56,835 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:51:56,835 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-02-19 17:51:56,916 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:56,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:51:56,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:51:56,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947522907] [2021-02-19 17:51:56,917 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:51:56,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:51:56,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:51:56,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:51:56,917 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) [2021-02-19 17:51:57,637 WARN L202 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-02-19 17:51:57,920 WARN L202 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2021-02-19 17:51:58,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:51:58,014 INFO L93 Difference]: Finished difference Result 178 states and 386 transitions. [2021-02-19 17:51:58,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:51:58,016 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 [2021-02-19 17:51:58,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:51:58,016 INFO L225 Difference]: With dead ends: 178 [2021-02-19 17:51:58,016 INFO L226 Difference]: Without dead ends: 178 [2021-02-19 17:51:58,016 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:51:58,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-02-19 17:51:58,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 155. [2021-02-19 17:51:58,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.207792207792208) internal successors, (340), 154 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) [2021-02-19 17:51:58,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 340 transitions. [2021-02-19 17:51:58,018 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 340 transitions. Word has length 19 [2021-02-19 17:51:58,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:51:58,018 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 340 transitions. [2021-02-19 17:51:58,018 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) [2021-02-19 17:51:58,018 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 340 transitions. [2021-02-19 17:51:58,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:51:58,018 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:51:58,018 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:51:58,218 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1702 [2021-02-19 17:51:58,219 INFO L428 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:51:58,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:51:58,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1693679924, now seen corresponding path program 338 times [2021-02-19 17:51:58,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:51:58,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484471339] [2021-02-19 17:51:58,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:51:58,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:51:58,415 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:58,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484471339] [2021-02-19 17:51:58,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407721640] [2021-02-19 17:51:58,416 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 [2021-02-19 17:51:58,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:51:58,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:51:58,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:51:58,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:51:58,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:58,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:58,837 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 [2021-02-19 17:51:58,839 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:58,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:58,844 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 [2021-02-19 17:51:58,847 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:58,889 INFO L628 ElimStorePlain]: treesize reduction 38, result has 28.3 percent of original size [2021-02-19 17:51:58,889 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:51:58,892 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:51:58,892 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-02-19 17:51:58,924 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:58,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:51:58,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-02-19 17:51:58,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286023053] [2021-02-19 17:51:58,925 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:51:58,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:51:58,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:51:58,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:51:58,925 INFO L87 Difference]: Start difference. First operand 155 states and 340 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) [2021-02-19 17:51:59,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:51:59,173 INFO L93 Difference]: Finished difference Result 188 states and 406 transitions. [2021-02-19 17:51:59,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:51:59,175 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 [2021-02-19 17:51:59,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:51:59,175 INFO L225 Difference]: With dead ends: 188 [2021-02-19 17:51:59,175 INFO L226 Difference]: Without dead ends: 188 [2021-02-19 17:51:59,175 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:51:59,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-02-19 17:51:59,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 156. [2021-02-19 17:51:59,176 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) [2021-02-19 17:51:59,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 342 transitions. [2021-02-19 17:51:59,177 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 342 transitions. Word has length 19 [2021-02-19 17:51:59,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:51:59,177 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 342 transitions. [2021-02-19 17:51:59,177 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) [2021-02-19 17:51:59,177 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 342 transitions. [2021-02-19 17:51:59,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:51:59,177 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:51:59,177 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:51:59,377 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 339 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1709 [2021-02-19 17:51:59,377 INFO L428 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:51:59,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:51:59,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1854870496, now seen corresponding path program 339 times [2021-02-19 17:51:59,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:51:59,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991231464] [2021-02-19 17:51:59,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:51:59,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:51:59,604 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:59,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991231464] [2021-02-19 17:51:59,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108589612] [2021-02-19 17:51:59,604 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 [2021-02-19 17:51:59,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:51:59,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:51:59,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:51:59,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:52:00,059 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:52:00,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:52:00,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:52:00,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609608741] [2021-02-19 17:52:00,059 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:52:00,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:52:00,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:52:00,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:52:00,060 INFO L87 Difference]: Start difference. First operand 156 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) [2021-02-19 17:52:00,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:52:00,785 INFO L93 Difference]: Finished difference Result 207 states and 444 transitions. [2021-02-19 17:52:00,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:52:00,787 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 [2021-02-19 17:52:00,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:52:00,788 INFO L225 Difference]: With dead ends: 207 [2021-02-19 17:52:00,788 INFO L226 Difference]: Without dead ends: 207 [2021-02-19 17:52:00,788 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:52:00,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-02-19 17:52:00,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 157. [2021-02-19 17:52:00,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.2051282051282053) internal successors, (344), 156 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) [2021-02-19 17:52:00,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 344 transitions. [2021-02-19 17:52:00,790 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 344 transitions. Word has length 19 [2021-02-19 17:52:00,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:52:00,790 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 344 transitions. [2021-02-19 17:52:00,790 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) [2021-02-19 17:52:00,790 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 344 transitions. [2021-02-19 17:52:00,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:52:00,790 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:52:00,790 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:52:00,990 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1711 [2021-02-19 17:52:00,990 INFO L428 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:52:00,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:52:00,991 INFO L82 PathProgramCache]: Analyzing trace with hash 2091112088, now seen corresponding path program 340 times [2021-02-19 17:52:00,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:52:00,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257997009] [2021-02-19 17:52:00,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:52:00,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:52:01,195 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:52:01,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257997009] [2021-02-19 17:52:01,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024498197] [2021-02-19 17:52:01,195 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 [2021-02-19 17:52:01,215 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:52:01,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:52:01,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:52:01,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:52:01,697 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:52:01,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:52:01,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:52:01,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566205863] [2021-02-19 17:52:01,697 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:52:01,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:52:01,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:52:01,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:52:01,698 INFO L87 Difference]: Start difference. First operand 157 states and 344 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) [2021-02-19 17:52:02,426 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-02-19 17:52:02,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:52:02,690 INFO L93 Difference]: Finished difference Result 222 states and 475 transitions. [2021-02-19 17:52:02,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:52:02,692 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 [2021-02-19 17:52:02,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:52:02,693 INFO L225 Difference]: With dead ends: 222 [2021-02-19 17:52:02,693 INFO L226 Difference]: Without dead ends: 222 [2021-02-19 17:52:02,693 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:52:02,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-02-19 17:52:02,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 158. [2021-02-19 17:52:02,694 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) [2021-02-19 17:52:02,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 346 transitions. [2021-02-19 17:52:02,695 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 346 transitions. Word has length 19 [2021-02-19 17:52:02,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:52:02,695 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 346 transitions. [2021-02-19 17:52:02,695 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) [2021-02-19 17:52:02,695 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 346 transitions. [2021-02-19 17:52:02,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:52:02,695 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:52:02,695 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:52:02,895 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1715,341 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:52:02,896 INFO L428 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:52:02,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:52:02,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1849012049, now seen corresponding path program 341 times [2021-02-19 17:52:02,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:52:02,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132748887] [2021-02-19 17:52:02,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:52:02,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:52:03,144 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:52:03,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132748887] [2021-02-19 17:52:03,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075702244] [2021-02-19 17:52:03,144 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 [2021-02-19 17:52:03,163 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 17:52:03,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:52:03,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:52:03,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:52:03,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:03,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:03,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:52:03,567 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:03,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:03,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:52:03,575 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:03,673 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-02-19 17:52:03,673 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:52:03,677 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 [2021-02-19 17:52:03,680 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:03,714 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:52:03,714 INFO L518 ElimStorePlain]: Eliminatee v_prenex_289 vanished before elimination [2021-02-19 17:52:03,715 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:52:03,715 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-02-19 17:52:03,827 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:52:03,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:52:03,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-02-19 17:52:03,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944550973] [2021-02-19 17:52:03,827 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:52:03,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:52:03,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:52:03,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:52:03,827 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) [2021-02-19 17:52:04,609 WARN L202 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-02-19 17:52:04,859 WARN L202 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2021-02-19 17:52:05,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:52:05,042 INFO L93 Difference]: Finished difference Result 181 states and 392 transitions. [2021-02-19 17:52:05,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:52:05,044 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 [2021-02-19 17:52:05,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:52:05,044 INFO L225 Difference]: With dead ends: 181 [2021-02-19 17:52:05,044 INFO L226 Difference]: Without dead ends: 181 [2021-02-19 17:52:05,044 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:52:05,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-02-19 17:52:05,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 155. [2021-02-19 17:52:05,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.207792207792208) internal successors, (340), 154 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) [2021-02-19 17:52:05,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 340 transitions. [2021-02-19 17:52:05,046 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 340 transitions. Word has length 19 [2021-02-19 17:52:05,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:52:05,046 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 340 transitions. [2021-02-19 17:52:05,046 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) [2021-02-19 17:52:05,046 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 340 transitions. [2021-02-19 17:52:05,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:52:05,046 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:52:05,046 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:52:05,247 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1725,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:52:05,247 INFO L428 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:52:05,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:52:05,247 INFO L82 PathProgramCache]: Analyzing trace with hash -814634698, now seen corresponding path program 342 times [2021-02-19 17:52:05,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:52:05,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486845626] [2021-02-19 17:52:05,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:52:05,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:52:05,446 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:52:05,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486845626] [2021-02-19 17:52:05,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352991009] [2021-02-19 17:52:05,446 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 [2021-02-19 17:52:05,465 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:52:05,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:52:05,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:52:05,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:52:05,825 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:52:05,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:52:05,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:52:05,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668820873] [2021-02-19 17:52:05,825 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:52:05,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:52:05,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:52:05,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:52:05,826 INFO L87 Difference]: Start difference. First operand 155 states and 340 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) [2021-02-19 17:52:06,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:52:06,315 INFO L93 Difference]: Finished difference Result 194 states and 417 transitions. [2021-02-19 17:52:06,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:52:06,315 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 [2021-02-19 17:52:06,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:52:06,316 INFO L225 Difference]: With dead ends: 194 [2021-02-19 17:52:06,316 INFO L226 Difference]: Without dead ends: 194 [2021-02-19 17:52:06,316 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:52:06,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-02-19 17:52:06,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 155. [2021-02-19 17:52:06,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.207792207792208) internal successors, (340), 154 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) [2021-02-19 17:52:06,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 340 transitions. [2021-02-19 17:52:06,317 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 340 transitions. Word has length 19 [2021-02-19 17:52:06,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:52:06,317 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 340 transitions. [2021-02-19 17:52:06,317 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) [2021-02-19 17:52:06,317 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 340 transitions. [2021-02-19 17:52:06,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:52:06,318 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:52:06,318 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:52:06,518 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1732 [2021-02-19 17:52:06,518 INFO L428 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:52:06,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:52:06,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1048266329, now seen corresponding path program 343 times [2021-02-19 17:52:06,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:52:06,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263038942] [2021-02-19 17:52:06,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:52:06,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:52:06,729 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:52:06,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263038942] [2021-02-19 17:52:06,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392979983] [2021-02-19 17:52:06,729 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 [2021-02-19 17:52:06,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:52:06,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:52:06,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:52:07,144 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:52:07,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:52:07,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:52:07,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848372153] [2021-02-19 17:52:07,145 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:52:07,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:52:07,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:52:07,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:52:07,145 INFO L87 Difference]: Start difference. First operand 155 states and 340 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) [2021-02-19 17:52:07,855 WARN L202 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-02-19 17:52:08,109 WARN L202 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2021-02-19 17:52:08,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:52:08,162 INFO L93 Difference]: Finished difference Result 167 states and 359 transitions. [2021-02-19 17:52:08,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:52:08,164 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 [2021-02-19 17:52:08,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:52:08,164 INFO L225 Difference]: With dead ends: 167 [2021-02-19 17:52:08,164 INFO L226 Difference]: Without dead ends: 161 [2021-02-19 17:52:08,164 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:52:08,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-02-19 17:52:08,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 155. [2021-02-19 17:52:08,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.2012987012987013) internal successors, (339), 154 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) [2021-02-19 17:52:08,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 339 transitions. [2021-02-19 17:52:08,166 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 339 transitions. Word has length 19 [2021-02-19 17:52:08,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:52:08,166 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 339 transitions. [2021-02-19 17:52:08,166 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) [2021-02-19 17:52:08,166 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 339 transitions. [2021-02-19 17:52:08,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:52:08,166 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:52:08,166 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:52:08,366 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1736,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:52:08,367 INFO L428 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:52:08,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:52:08,367 INFO L82 PathProgramCache]: Analyzing trace with hash -958381726, now seen corresponding path program 344 times [2021-02-19 17:52:08,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:52:08,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521278892] [2021-02-19 17:52:08,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:52:08,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:52:08,604 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:52:08,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521278892] [2021-02-19 17:52:08,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437148996] [2021-02-19 17:52:08,604 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 [2021-02-19 17:52:08,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:52:08,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:52:08,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:52:08,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:52:08,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:08,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:08,936 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 17 treesize of output 13 [2021-02-19 17:52:08,939 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:08,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:08,945 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 17 treesize of output 13 [2021-02-19 17:52:08,947 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:09,080 WARN L202 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 27 [2021-02-19 17:52:09,081 INFO L628 ElimStorePlain]: treesize reduction 78, result has 35.5 percent of original size [2021-02-19 17:52:09,084 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 [2021-02-19 17:52:09,088 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:09,135 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:52:09,135 INFO L518 ElimStorePlain]: Eliminatee v_prenex_291 vanished before elimination [2021-02-19 17:52:09,135 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:52:09,139 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:52:09,139 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-02-19 17:52:09,263 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:52:09,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:52:09,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-02-19 17:52:09,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797878523] [2021-02-19 17:52:09,264 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:52:09,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:52:09,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:52:09,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:52:09,264 INFO L87 Difference]: Start difference. First operand 155 states and 339 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) [2021-02-19 17:52:10,128 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 25 [2021-02-19 17:52:10,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:52:10,256 INFO L93 Difference]: Finished difference Result 232 states and 486 transitions. [2021-02-19 17:52:10,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:52:10,259 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 [2021-02-19 17:52:10,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:52:10,259 INFO L225 Difference]: With dead ends: 232 [2021-02-19 17:52:10,259 INFO L226 Difference]: Without dead ends: 232 [2021-02-19 17:52:10,259 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2021-02-19 17:52:10,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-02-19 17:52:10,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 156. [2021-02-19 17:52:10,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.2129032258064516) internal successors, (343), 155 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:52:10,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 343 transitions. [2021-02-19 17:52:10,264 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 343 transitions. Word has length 19 [2021-02-19 17:52:10,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:52:10,264 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 343 transitions. [2021-02-19 17:52:10,264 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) [2021-02-19 17:52:10,264 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 343 transitions. [2021-02-19 17:52:10,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:52:10,264 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:52:10,264 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:52:10,464 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1742 [2021-02-19 17:52:10,465 INFO L428 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:52:10,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:52:10,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1797202223, now seen corresponding path program 345 times [2021-02-19 17:52:10,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:52:10,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377412008] [2021-02-19 17:52:10,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:52:10,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:52:10,700 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:52:10,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377412008] [2021-02-19 17:52:10,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105736555] [2021-02-19 17:52:10,700 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 [2021-02-19 17:52:10,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:52:10,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:52:10,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:52:10,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:52:11,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:11,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:11,068 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 15 treesize of output 11 [2021-02-19 17:52:11,071 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:11,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:11,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:52:11,080 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:11,212 WARN L202 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 26 [2021-02-19 17:52:11,213 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-02-19 17:52:11,213 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:52:11,217 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 [2021-02-19 17:52:11,221 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:11,267 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:52:11,267 INFO L518 ElimStorePlain]: Eliminatee v_prenex_294 vanished before elimination [2021-02-19 17:52:11,269 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:52:11,269 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-02-19 17:52:11,370 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:52:11,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:52:11,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:52:11,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154954089] [2021-02-19 17:52:11,371 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:52:11,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:52:11,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:52:11,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:52:11,371 INFO L87 Difference]: Start difference. First operand 156 states and 343 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) [2021-02-19 17:52:12,364 WARN L202 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-02-19 17:52:12,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:52:12,680 INFO L93 Difference]: Finished difference Result 195 states and 410 transitions. [2021-02-19 17:52:12,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:52:12,685 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 [2021-02-19 17:52:12,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:52:12,686 INFO L225 Difference]: With dead ends: 195 [2021-02-19 17:52:12,686 INFO L226 Difference]: Without dead ends: 192 [2021-02-19 17:52:12,686 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:52:12,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-02-19 17:52:12,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 160. [2021-02-19 17:52:12,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.207547169811321) internal successors, (351), 159 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:52:12,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 351 transitions. [2021-02-19 17:52:12,688 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 351 transitions. Word has length 19 [2021-02-19 17:52:12,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:52:12,688 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 351 transitions. [2021-02-19 17:52:12,688 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) [2021-02-19 17:52:12,688 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 351 transitions. [2021-02-19 17:52:12,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:52:12,688 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:52:12,688 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:52:12,901 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1746,346 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:52:12,902 INFO L428 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:52:12,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:52:12,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1815190582, now seen corresponding path program 346 times [2021-02-19 17:52:12,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:52:12,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756591569] [2021-02-19 17:52:12,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:52:12,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:52:13,113 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:52:13,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756591569] [2021-02-19 17:52:13,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045143300] [2021-02-19 17:52:13,114 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 [2021-02-19 17:52:13,132 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:52:13,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:52:13,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:52:13,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:52:13,575 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:52:13,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:52:13,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:52:13,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353348749] [2021-02-19 17:52:13,576 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:52:13,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:52:13,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:52:13,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:52:13,576 INFO L87 Difference]: Start difference. First operand 160 states and 351 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) [2021-02-19 17:52:14,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:52:14,491 INFO L93 Difference]: Finished difference Result 204 states and 436 transitions. [2021-02-19 17:52:14,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:52:14,492 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 [2021-02-19 17:52:14,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:52:14,492 INFO L225 Difference]: With dead ends: 204 [2021-02-19 17:52:14,492 INFO L226 Difference]: Without dead ends: 202 [2021-02-19 17:52:14,492 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:52:14,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-02-19 17:52:14,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 160. [2021-02-19 17:52:14,494 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) [2021-02-19 17:52:14,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 350 transitions. [2021-02-19 17:52:14,494 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 350 transitions. Word has length 19 [2021-02-19 17:52:14,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:52:14,494 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 350 transitions. [2021-02-19 17:52:14,494 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) [2021-02-19 17:52:14,494 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 350 transitions. [2021-02-19 17:52:14,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:52:14,494 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:52:14,494 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:52:14,694 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 347 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1754 [2021-02-19 17:52:14,695 INFO L428 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:52:14,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:52:14,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1405719449, now seen corresponding path program 347 times [2021-02-19 17:52:14,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:52:14,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463987566] [2021-02-19 17:52:14,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:52:14,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:52:14,933 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:52:14,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463987566] [2021-02-19 17:52:14,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371374494] [2021-02-19 17:52:14,933 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 [2021-02-19 17:52:14,959 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 17:52:14,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:52:14,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:52:14,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:52:15,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:15,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:15,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:52:15,317 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:15,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:15,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:52:15,325 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:15,427 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 25 [2021-02-19 17:52:15,428 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-02-19 17:52:15,428 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:52:15,432 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 [2021-02-19 17:52:15,435 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:15,472 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:52:15,472 INFO L518 ElimStorePlain]: Eliminatee v_prenex_297 vanished before elimination [2021-02-19 17:52:15,474 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:52:15,474 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-02-19 17:52:15,549 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:52:15,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:52:15,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:52:15,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727405985] [2021-02-19 17:52:15,549 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:52:15,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:52:15,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:52:15,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:52:15,550 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) [2021-02-19 17:52:16,445 WARN L202 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-02-19 17:52:16,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:52:16,560 INFO L93 Difference]: Finished difference Result 178 states and 385 transitions. [2021-02-19 17:52:16,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:52:16,562 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 [2021-02-19 17:52:16,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:52:16,562 INFO L225 Difference]: With dead ends: 178 [2021-02-19 17:52:16,562 INFO L226 Difference]: Without dead ends: 178 [2021-02-19 17:52:16,562 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:52:16,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-02-19 17:52:16,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 154. [2021-02-19 17:52:16,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.2026143790849675) internal successors, (337), 153 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) [2021-02-19 17:52:16,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 337 transitions. [2021-02-19 17:52:16,564 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 337 transitions. Word has length 19 [2021-02-19 17:52:16,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:52:16,564 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 337 transitions. [2021-02-19 17:52:16,564 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) [2021-02-19 17:52:16,564 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 337 transitions. [2021-02-19 17:52:16,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:52:16,564 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:52:16,564 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:52:16,764 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1767,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:52:16,764 INFO L428 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:52:16,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:52:16,765 INFO L82 PathProgramCache]: Analyzing trace with hash -370636404, now seen corresponding path program 348 times [2021-02-19 17:52:16,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:52:16,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518723467] [2021-02-19 17:52:16,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:52:16,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:52:17,003 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:52:17,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518723467] [2021-02-19 17:52:17,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435920679] [2021-02-19 17:52:17,003 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 [2021-02-19 17:52:17,022 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 17:52:17,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:52:17,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:52:17,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:52:17,408 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:52:17,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:52:17,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:52:17,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657125693] [2021-02-19 17:52:17,408 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:52:17,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:52:17,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:52:17,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:52:17,409 INFO L87 Difference]: Start difference. First operand 154 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) [2021-02-19 17:52:18,059 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-02-19 17:52:18,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:52:18,167 INFO L93 Difference]: Finished difference Result 190 states and 400 transitions. [2021-02-19 17:52:18,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:52:18,169 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 [2021-02-19 17:52:18,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:52:18,170 INFO L225 Difference]: With dead ends: 190 [2021-02-19 17:52:18,170 INFO L226 Difference]: Without dead ends: 190 [2021-02-19 17:52:18,170 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:52:18,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-02-19 17:52:18,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 154. [2021-02-19 17:52:18,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.2026143790849675) internal successors, (337), 153 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) [2021-02-19 17:52:18,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 337 transitions. [2021-02-19 17:52:18,171 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 337 transitions. Word has length 19 [2021-02-19 17:52:18,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:52:18,171 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 337 transitions. [2021-02-19 17:52:18,172 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) [2021-02-19 17:52:18,172 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 337 transitions. [2021-02-19 17:52:18,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:52:18,172 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:52:18,172 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:52:18,372 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1774,349 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:52:18,372 INFO L428 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:52:18,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:52:18,372 INFO L82 PathProgramCache]: Analyzing trace with hash -1023211811, now seen corresponding path program 349 times [2021-02-19 17:52:18,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:52:18,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506145236] [2021-02-19 17:52:18,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:52:18,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:52:18,580 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:52:18,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506145236] [2021-02-19 17:52:18,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974158818] [2021-02-19 17:52:18,580 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 [2021-02-19 17:52:18,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:52:18,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:52:18,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:52:18,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:18,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:18,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:52:18,917 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:18,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:18,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:18,923 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 [2021-02-19 17:52:18,926 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:18,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:18,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:18,932 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 16 treesize of output 12 [2021-02-19 17:52:18,935 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:18,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:18,940 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 15 treesize of output 11 [2021-02-19 17:52:18,942 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:19,034 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-02-19 17:52:19,034 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:52:19,036 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:52:19,036 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-02-19 17:52:19,116 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:52:19,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:52:19,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:52:19,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172237117] [2021-02-19 17:52:19,116 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:52:19,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:52:19,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:52:19,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:52:19,117 INFO L87 Difference]: Start difference. First operand 154 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) [2021-02-19 17:52:19,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:52:19,928 INFO L93 Difference]: Finished difference Result 226 states and 469 transitions. [2021-02-19 17:52:19,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:52:19,930 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 [2021-02-19 17:52:19,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:52:19,930 INFO L225 Difference]: With dead ends: 226 [2021-02-19 17:52:19,930 INFO L226 Difference]: Without dead ends: 226 [2021-02-19 17:52:19,931 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:52:19,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-02-19 17:52:19,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 155. [2021-02-19 17:52:19,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.220779220779221) internal successors, (342), 154 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) [2021-02-19 17:52:19,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 342 transitions. [2021-02-19 17:52:19,932 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 342 transitions. Word has length 19 [2021-02-19 17:52:19,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:52:19,932 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 342 transitions. [2021-02-19 17:52:19,932 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) [2021-02-19 17:52:19,932 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 342 transitions. [2021-02-19 17:52:19,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:52:19,933 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:52:19,933 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:52:20,133 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1784 [2021-02-19 17:52:20,133 INFO L428 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:52:20,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:52:20,133 INFO L82 PathProgramCache]: Analyzing trace with hash 256765144, now seen corresponding path program 350 times [2021-02-19 17:52:20,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:52:20,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946908860] [2021-02-19 17:52:20,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:52:20,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:52:20,375 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:52:20,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946908860] [2021-02-19 17:52:20,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303432014] [2021-02-19 17:52:20,375 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 [2021-02-19 17:52:20,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:52:20,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:52:20,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:52:20,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:52:20,747 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:52:20,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:52:20,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:52:20,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538103889] [2021-02-19 17:52:20,747 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:52:20,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:52:20,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:52:20,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:52:20,748 INFO L87 Difference]: Start difference. First operand 155 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) [2021-02-19 17:52:21,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:52:21,410 INFO L93 Difference]: Finished difference Result 165 states and 358 transitions. [2021-02-19 17:52:21,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:52:21,412 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 [2021-02-19 17:52:21,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:52:21,412 INFO L225 Difference]: With dead ends: 165 [2021-02-19 17:52:21,412 INFO L226 Difference]: Without dead ends: 161 [2021-02-19 17:52:21,412 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:52:21,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-02-19 17:52:21,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 155. [2021-02-19 17:52:21,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.2142857142857144) internal successors, (341), 154 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) [2021-02-19 17:52:21,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 341 transitions. [2021-02-19 17:52:21,414 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 341 transitions. Word has length 19 [2021-02-19 17:52:21,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:52:21,414 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 341 transitions. [2021-02-19 17:52:21,414 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) [2021-02-19 17:52:21,414 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 341 transitions. [2021-02-19 17:52:21,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:52:21,414 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:52:21,414 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:52:21,615 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 351 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1794 [2021-02-19 17:52:21,615 INFO L428 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:52:21,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:52:21,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1353203929, now seen corresponding path program 351 times [2021-02-19 17:52:21,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:52:21,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138433204] [2021-02-19 17:52:21,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:52:21,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:52:21,726 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:52:21,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138433204] [2021-02-19 17:52:21,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763903372] [2021-02-19 17:52:21,726 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 [2021-02-19 17:52:21,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 17:52:21,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:52:21,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:52:21,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:52:22,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:22,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:22,031 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 16 treesize of output 12 [2021-02-19 17:52:22,034 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:22,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:22,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:52:22,043 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:22,086 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-02-19 17:52:22,087 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:52:22,088 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:52:22,089 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-02-19 17:52:22,140 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:52:22,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:52:22,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-02-19 17:52:22,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930986623] [2021-02-19 17:52:22,141 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:52:22,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:52:22,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:52:22,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:52:22,141 INFO L87 Difference]: Start difference. First operand 155 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) [2021-02-19 17:52:22,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:52:22,632 INFO L93 Difference]: Finished difference Result 184 states and 395 transitions. [2021-02-19 17:52:22,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:52:22,634 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 [2021-02-19 17:52:22,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:52:22,635 INFO L225 Difference]: With dead ends: 184 [2021-02-19 17:52:22,635 INFO L226 Difference]: Without dead ends: 184 [2021-02-19 17:52:22,635 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:52:22,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-02-19 17:52:22,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 149. [2021-02-19 17:52:22,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.2027027027027026) internal successors, (326), 148 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:52:22,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 326 transitions. [2021-02-19 17:52:22,636 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 326 transitions. Word has length 19 [2021-02-19 17:52:22,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:52:22,637 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 326 transitions. [2021-02-19 17:52:22,637 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) [2021-02-19 17:52:22,637 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 326 transitions. [2021-02-19 17:52:22,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:52:22,637 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:52:22,637 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:52:22,837 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1798,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:52:22,837 INFO L428 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:52:22,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:52:22,838 INFO L82 PathProgramCache]: Analyzing trace with hash 307125878, now seen corresponding path program 352 times [2021-02-19 17:52:22,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:52:22,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957548300] [2021-02-19 17:52:22,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:52:22,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:52:23,063 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:52:23,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957548300] [2021-02-19 17:52:23,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109125505] [2021-02-19 17:52:23,063 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 [2021-02-19 17:52:23,082 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:52:23,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:52:23,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:52:23,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:52:23,481 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:52:23,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:52:23,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:52:23,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334556901] [2021-02-19 17:52:23,481 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:52:23,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:52:23,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:52:23,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:52:23,482 INFO L87 Difference]: Start difference. First operand 149 states and 326 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) [2021-02-19 17:52:24,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:52:24,016 INFO L93 Difference]: Finished difference Result 185 states and 398 transitions. [2021-02-19 17:52:24,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:52:24,018 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 [2021-02-19 17:52:24,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:52:24,018 INFO L225 Difference]: With dead ends: 185 [2021-02-19 17:52:24,018 INFO L226 Difference]: Without dead ends: 185 [2021-02-19 17:52:24,018 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:52:24,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-02-19 17:52:24,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 149. [2021-02-19 17:52:24,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.2027027027027026) internal successors, (326), 148 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:52:24,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 326 transitions. [2021-02-19 17:52:24,020 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 326 transitions. Word has length 19 [2021-02-19 17:52:24,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:52:24,020 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 326 transitions. [2021-02-19 17:52:24,020 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) [2021-02-19 17:52:24,020 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 326 transitions. [2021-02-19 17:52:24,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:52:24,020 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:52:24,020 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:52:24,220 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1802,353 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:52:24,221 INFO L428 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:52:24,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:52:24,221 INFO L82 PathProgramCache]: Analyzing trace with hash 163378850, now seen corresponding path program 353 times [2021-02-19 17:52:24,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:52:24,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237769891] [2021-02-19 17:52:24,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:52:24,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:52:24,463 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:52:24,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237769891] [2021-02-19 17:52:24,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395823724] [2021-02-19 17:52:24,464 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 [2021-02-19 17:52:24,482 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 17:52:24,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:52:24,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:52:24,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:52:24,915 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:52:24,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:52:24,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:52:24,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730794888] [2021-02-19 17:52:24,915 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:52:24,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:52:24,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:52:24,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:52:24,916 INFO L87 Difference]: Start difference. First operand 149 states and 326 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) [2021-02-19 17:52:25,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:52:25,725 INFO L93 Difference]: Finished difference Result 223 states and 467 transitions. [2021-02-19 17:52:25,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:52:25,726 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 [2021-02-19 17:52:25,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:52:25,727 INFO L225 Difference]: With dead ends: 223 [2021-02-19 17:52:25,727 INFO L226 Difference]: Without dead ends: 223 [2021-02-19 17:52:25,727 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:52:25,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-02-19 17:52:25,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 150. [2021-02-19 17:52:25,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.214765100671141) internal successors, (330), 149 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) [2021-02-19 17:52:25,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 330 transitions. [2021-02-19 17:52:25,729 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 330 transitions. Word has length 19 [2021-02-19 17:52:25,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:52:25,729 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 330 transitions. [2021-02-19 17:52:25,729 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) [2021-02-19 17:52:25,729 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 330 transitions. [2021-02-19 17:52:25,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:52:25,729 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:52:25,729 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:52:25,929 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1806,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:52:25,929 INFO L428 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:52:25,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:52:25,930 INFO L82 PathProgramCache]: Analyzing trace with hash -675441647, now seen corresponding path program 354 times [2021-02-19 17:52:25,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:52:25,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106306027] [2021-02-19 17:52:25,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:52:25,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:52:26,176 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:52:26,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106306027] [2021-02-19 17:52:26,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349528471] [2021-02-19 17:52:26,177 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 [2021-02-19 17:52:26,196 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 17:52:26,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:52:26,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:52:26,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:52:26,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:26,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:26,548 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 17 treesize of output 13 [2021-02-19 17:52:26,551 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:26,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:26,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:52:26,560 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:26,673 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 25 [2021-02-19 17:52:26,674 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-02-19 17:52:26,674 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:52:26,678 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 [2021-02-19 17:52:26,681 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:26,722 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:52:26,722 INFO L518 ElimStorePlain]: Eliminatee v_prenex_300 vanished before elimination [2021-02-19 17:52:26,724 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:52:26,724 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-02-19 17:52:26,810 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:52:26,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:52:26,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:52:26,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955917725] [2021-02-19 17:52:26,810 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:52:26,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:52:26,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:52:26,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:52:26,811 INFO L87 Difference]: Start difference. First operand 150 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) [2021-02-19 17:52:27,489 WARN L202 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-02-19 17:52:27,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:52:27,745 INFO L93 Difference]: Finished difference Result 187 states and 393 transitions. [2021-02-19 17:52:27,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:52:27,748 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 [2021-02-19 17:52:27,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:52:27,748 INFO L225 Difference]: With dead ends: 187 [2021-02-19 17:52:27,748 INFO L226 Difference]: Without dead ends: 184 [2021-02-19 17:52:27,748 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:52:27,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-02-19 17:52:27,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 154. [2021-02-19 17:52:27,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.2091503267973858) internal successors, (338), 153 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) [2021-02-19 17:52:27,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 338 transitions. [2021-02-19 17:52:27,750 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 338 transitions. Word has length 19 [2021-02-19 17:52:27,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:52:27,750 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 338 transitions. [2021-02-19 17:52:27,750 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) [2021-02-19 17:52:27,750 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 338 transitions. [2021-02-19 17:52:27,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:52:27,750 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:52:27,750 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:52:27,958 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1816,355 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:52:27,958 INFO L428 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:52:27,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:52:27,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1358016138, now seen corresponding path program 355 times [2021-02-19 17:52:27,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:52:27,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436293841] [2021-02-19 17:52:27,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:52:27,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:52:28,181 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:52:28,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436293841] [2021-02-19 17:52:28,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106038222] [2021-02-19 17:52:28,181 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 [2021-02-19 17:52:28,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:52:28,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:52:28,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:52:28,644 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:52:28,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:52:28,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:52:28,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834900239] [2021-02-19 17:52:28,645 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:52:28,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:52:28,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:52:28,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:52:28,645 INFO L87 Difference]: Start difference. First operand 154 states and 338 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) [2021-02-19 17:52:29,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:52:29,300 INFO L93 Difference]: Finished difference Result 194 states and 415 transitions. [2021-02-19 17:52:29,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:52:29,302 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 [2021-02-19 17:52:29,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:52:29,303 INFO L225 Difference]: With dead ends: 194 [2021-02-19 17:52:29,303 INFO L226 Difference]: Without dead ends: 192 [2021-02-19 17:52:29,303 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:52:29,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-02-19 17:52:29,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 154. [2021-02-19 17:52:29,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.2026143790849675) internal successors, (337), 153 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) [2021-02-19 17:52:29,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 337 transitions. [2021-02-19 17:52:29,304 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 337 transitions. Word has length 19 [2021-02-19 17:52:29,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:52:29,304 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 337 transitions. [2021-02-19 17:52:29,305 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) [2021-02-19 17:52:29,305 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 337 transitions. [2021-02-19 17:52:29,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:52:29,305 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:52:29,305 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:52:29,505 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1824,356 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:52:29,505 INFO L428 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:52:29,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:52:29,505 INFO L82 PathProgramCache]: Analyzing trace with hash -283958873, now seen corresponding path program 356 times [2021-02-19 17:52:29,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:52:29,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617894247] [2021-02-19 17:52:29,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:52:29,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:52:29,720 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:52:29,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617894247] [2021-02-19 17:52:29,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678630405] [2021-02-19 17:52:29,721 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 [2021-02-19 17:52:29,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:52:29,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:52:29,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:52:29,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:52:30,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:30,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:30,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:52:30,057 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:30,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:30,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:52:30,066 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:30,221 WARN L202 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 33 [2021-02-19 17:52:30,222 INFO L628 ElimStorePlain]: treesize reduction 76, result has 40.2 percent of original size [2021-02-19 17:52:30,222 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:52:30,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:30,226 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 [2021-02-19 17:52:30,229 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:30,276 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:52:30,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:30,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:52:30,286 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:52:30,330 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:52:30,332 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:52:30,333 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:141, output treesize:22 [2021-02-19 17:52:30,458 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:52:30,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:52:30,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-02-19 17:52:30,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185830705] [2021-02-19 17:52:30,459 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:52:30,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:52:30,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:52:30,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:52:30,459 INFO L87 Difference]: Start difference. First operand 154 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) [2021-02-19 17:52:30,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:52:30,951 INFO L93 Difference]: Finished difference Result 170 states and 368 transitions. [2021-02-19 17:52:30,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:52:30,953 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 [2021-02-19 17:52:30,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:52:30,953 INFO L225 Difference]: With dead ends: 170 [2021-02-19 17:52:30,953 INFO L226 Difference]: Without dead ends: 170 [2021-02-19 17:52:30,953 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:52:30,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-02-19 17:52:30,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 148. [2021-02-19 17:52:30,955 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) [2021-02-19 17:52:30,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 324 transitions. [2021-02-19 17:52:30,955 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 324 transitions. Word has length 19 [2021-02-19 17:52:30,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:52:30,955 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 324 transitions. [2021-02-19 17:52:30,955 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) [2021-02-19 17:52:30,955 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 324 transitions. [2021-02-19 17:52:30,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:52:30,955 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:52:30,955 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:52:31,155 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 357 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1835 [2021-02-19 17:52:31,156 INFO L428 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:52:31,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:52:31,156 INFO L82 PathProgramCache]: Analyzing trace with hash 751124172, now seen corresponding path program 357 times [2021-02-19 17:52:31,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:52:31,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898171213] [2021-02-19 17:52:31,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:52:31,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:52:31,438 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:52:31,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898171213] [2021-02-19 17:52:31,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872340694] [2021-02-19 17:52:31,439 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 [2021-02-19 17:52:31,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:52:31,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:52:31,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:52:31,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:52:31,891 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:52:31,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:52:31,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:52:31,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808152351] [2021-02-19 17:52:31,891 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:52:31,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:52:31,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:52:31,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:52:31,892 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) [2021-02-19 17:52:32,609 WARN L202 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-02-19 17:52:32,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:52:32,718 INFO L93 Difference]: Finished difference Result 186 states and 392 transitions. [2021-02-19 17:52:32,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:52:32,720 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 [2021-02-19 17:52:32,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:52:32,720 INFO L225 Difference]: With dead ends: 186 [2021-02-19 17:52:32,720 INFO L226 Difference]: Without dead ends: 186 [2021-02-19 17:52:32,720 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:52:32,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-02-19 17:52:32,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 150. [2021-02-19 17:52:32,721 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) [2021-02-19 17:52:32,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 329 transitions. [2021-02-19 17:52:32,722 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 329 transitions. Word has length 19 [2021-02-19 17:52:32,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:52:32,722 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 329 transitions. [2021-02-19 17:52:32,722 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) [2021-02-19 17:52:32,722 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 329 transitions. [2021-02-19 17:52:32,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:52:32,722 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:52:32,722 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:52:32,922 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1839,358 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:52:32,922 INFO L428 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:52:32,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:52:32,923 INFO L82 PathProgramCache]: Analyzing trace with hash 303786449, now seen corresponding path program 358 times [2021-02-19 17:52:32,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:52:32,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819283261] [2021-02-19 17:52:32,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:52:32,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:52:33,169 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:52:33,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819283261] [2021-02-19 17:52:33,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520889528] [2021-02-19 17:52:33,169 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 [2021-02-19 17:52:33,187 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:52:33,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:52:33,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:52:33,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:52:33,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:33,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:33,532 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 16 treesize of output 12 [2021-02-19 17:52:33,534 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:33,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:33,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:33,541 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 15 treesize of output 11 [2021-02-19 17:52:33,543 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:33,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:33,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:33,550 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 [2021-02-19 17:52:33,553 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:33,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:33,558 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 16 treesize of output 12 [2021-02-19 17:52:33,561 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:33,647 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-02-19 17:52:33,647 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:52:33,649 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:52:33,650 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-02-19 17:52:33,756 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:52:33,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:52:33,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-02-19 17:52:33,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639595104] [2021-02-19 17:52:33,756 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:52:33,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:52:33,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:52:33,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:52:33,757 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) [2021-02-19 17:52:34,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:52:34,735 INFO L93 Difference]: Finished difference Result 215 states and 446 transitions. [2021-02-19 17:52:34,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:52:34,737 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 [2021-02-19 17:52:34,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:52:34,737 INFO L225 Difference]: With dead ends: 215 [2021-02-19 17:52:34,738 INFO L226 Difference]: Without dead ends: 215 [2021-02-19 17:52:34,738 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2021-02-19 17:52:34,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-02-19 17:52:34,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 151. [2021-02-19 17:52:34,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.2266666666666666) internal successors, (334), 150 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:52:34,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 334 transitions. [2021-02-19 17:52:34,739 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 334 transitions. Word has length 19 [2021-02-19 17:52:34,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:52:34,739 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 334 transitions. [2021-02-19 17:52:34,739 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) [2021-02-19 17:52:34,739 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 334 transitions. [2021-02-19 17:52:34,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:52:34,740 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:52:34,740 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:52:34,940 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1851 [2021-02-19 17:52:34,940 INFO L428 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:52:34,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:52:34,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1378525720, now seen corresponding path program 359 times [2021-02-19 17:52:34,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:52:34,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635780810] [2021-02-19 17:52:34,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:52:34,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:52:35,058 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:52:35,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635780810] [2021-02-19 17:52:35,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236297915] [2021-02-19 17:52:35,059 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 [2021-02-19 17:52:35,077 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 17:52:35,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:52:35,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:52:35,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:52:35,363 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:52:35,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:52:35,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:52:35,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2485372] [2021-02-19 17:52:35,363 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:52:35,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:52:35,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:52:35,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:52:35,363 INFO L87 Difference]: Start difference. First operand 151 states and 334 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) [2021-02-19 17:52:35,860 WARN L202 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2021-02-19 17:52:36,057 WARN L202 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-02-19 17:52:36,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:52:36,094 INFO L93 Difference]: Finished difference Result 160 states and 348 transitions. [2021-02-19 17:52:36,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:52:36,095 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 [2021-02-19 17:52:36,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:52:36,096 INFO L225 Difference]: With dead ends: 160 [2021-02-19 17:52:36,096 INFO L226 Difference]: Without dead ends: 156 [2021-02-19 17:52:36,096 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:52:36,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-02-19 17:52:36,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 151. [2021-02-19 17:52:36,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.22) internal successors, (333), 150 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) [2021-02-19 17:52:36,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 333 transitions. [2021-02-19 17:52:36,097 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 333 transitions. Word has length 19 [2021-02-19 17:52:36,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:52:36,097 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 333 transitions. [2021-02-19 17:52:36,097 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) [2021-02-19 17:52:36,097 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 333 transitions. [2021-02-19 17:52:36,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:52:36,098 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:52:36,098 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:52:36,298 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1861,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:52:36,298 INFO L428 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:52:36,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:52:36,298 INFO L82 PathProgramCache]: Analyzing trace with hash -231443353, now seen corresponding path program 360 times [2021-02-19 17:52:36,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:52:36,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766219798] [2021-02-19 17:52:36,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:52:36,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:52:36,515 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:52:36,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766219798] [2021-02-19 17:52:36,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661059003] [2021-02-19 17:52:36,515 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 [2021-02-19 17:52:36,533 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:52:36,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:52:36,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:52:36,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:52:36,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:36,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:36,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:52:36,685 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:36,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:36,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:52:36,689 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:36,719 INFO L628 ElimStorePlain]: treesize reduction 30, result has 43.4 percent of original size [2021-02-19 17:52:36,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:36,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:52:36,729 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:52:36,744 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:52:36,746 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:52:36,746 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:67, output treesize:9 [2021-02-19 17:52:36,809 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:52:36,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:52:36,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-02-19 17:52:36,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700526211] [2021-02-19 17:52:36,809 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:52:36,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:52:36,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:52:36,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:52:36,810 INFO L87 Difference]: Start difference. First operand 151 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) [2021-02-19 17:52:37,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:52:37,492 INFO L93 Difference]: Finished difference Result 179 states and 385 transitions. [2021-02-19 17:52:37,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:52:37,494 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 [2021-02-19 17:52:37,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:52:37,494 INFO L225 Difference]: With dead ends: 179 [2021-02-19 17:52:37,494 INFO L226 Difference]: Without dead ends: 179 [2021-02-19 17:52:37,494 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:52:37,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-02-19 17:52:37,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 147. [2021-02-19 17:52:37,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.2054794520547945) internal successors, (322), 146 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) [2021-02-19 17:52:37,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 322 transitions. [2021-02-19 17:52:37,496 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 322 transitions. Word has length 19 [2021-02-19 17:52:37,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:52:37,496 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 322 transitions. [2021-02-19 17:52:37,496 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) [2021-02-19 17:52:37,496 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 322 transitions. [2021-02-19 17:52:37,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:52:37,496 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:52:37,496 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:52:37,696 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1865 [2021-02-19 17:52:37,696 INFO L428 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:52:37,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:52:37,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1586122286, now seen corresponding path program 361 times [2021-02-19 17:52:37,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:52:37,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597738136] [2021-02-19 17:52:37,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:52:37,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:52:37,945 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:52:37,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597738136] [2021-02-19 17:52:37,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121201751] [2021-02-19 17:52:37,945 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 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 [2021-02-19 17:52:37,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:52:37,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:52:37,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:52:38,249 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:52:38,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:52:38,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:52:38,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822721380] [2021-02-19 17:52:38,250 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:52:38,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:52:38,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:52:38,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:52:38,250 INFO L87 Difference]: Start difference. First operand 147 states and 322 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) [2021-02-19 17:52:38,952 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-02-19 17:52:39,131 WARN L202 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2021-02-19 17:52:39,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:52:39,282 INFO L93 Difference]: Finished difference Result 193 states and 405 transitions. [2021-02-19 17:52:39,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:52:39,285 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 [2021-02-19 17:52:39,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:52:39,285 INFO L225 Difference]: With dead ends: 193 [2021-02-19 17:52:39,285 INFO L226 Difference]: Without dead ends: 193 [2021-02-19 17:52:39,285 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:52:39,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-02-19 17:52:39,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 146. [2021-02-19 17:52:39,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.2) internal successors, (319), 145 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:52:39,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 319 transitions. [2021-02-19 17:52:39,287 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 319 transitions. Word has length 19 [2021-02-19 17:52:39,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:52:39,287 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 319 transitions. [2021-02-19 17:52:39,287 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) [2021-02-19 17:52:39,287 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 319 transitions. [2021-02-19 17:52:39,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:52:39,287 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:52:39,287 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:52:39,487 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1866,362 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:52:39,488 INFO L428 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:52:39,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:52:39,488 INFO L82 PathProgramCache]: Analyzing trace with hash 952539473, now seen corresponding path program 362 times [2021-02-19 17:52:39,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:52:39,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364494316] [2021-02-19 17:52:39,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:52:39,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:52:39,641 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:52:39,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364494316] [2021-02-19 17:52:39,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347320214] [2021-02-19 17:52:39,642 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 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 [2021-02-19 17:52:39,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:52:39,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:52:39,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:52:39,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:52:39,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:39,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:39,981 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 17 treesize of output 13 [2021-02-19 17:52:39,983 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:39,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:39,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:39,991 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 18 treesize of output 14 [2021-02-19 17:52:39,994 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:39,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:40,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:40,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:52:40,004 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:40,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:40,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:52:40,013 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:40,137 WARN L202 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2021-02-19 17:52:40,138 INFO L628 ElimStorePlain]: treesize reduction 69, result has 38.9 percent of original size [2021-02-19 17:52:40,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:40,144 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 9 treesize of output 5 [2021-02-19 17:52:40,148 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:52:40,190 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:52:40,192 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:52:40,192 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:141, output treesize:22 [2021-02-19 17:52:40,288 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:52:40,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:52:40,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:52:40,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372510248] [2021-02-19 17:52:40,289 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:52:40,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:52:40,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:52:40,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:52:40,289 INFO L87 Difference]: Start difference. First operand 146 states and 319 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) [2021-02-19 17:52:41,096 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-02-19 17:52:41,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:52:41,498 INFO L93 Difference]: Finished difference Result 206 states and 427 transitions. [2021-02-19 17:52:41,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:52:41,500 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 [2021-02-19 17:52:41,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:52:41,501 INFO L225 Difference]: With dead ends: 206 [2021-02-19 17:52:41,501 INFO L226 Difference]: Without dead ends: 203 [2021-02-19 17:52:41,501 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:52:41,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-02-19 17:52:41,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 153. [2021-02-19 17:52:41,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.210526315789474) internal successors, (336), 152 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) [2021-02-19 17:52:41,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 336 transitions. [2021-02-19 17:52:41,503 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 336 transitions. Word has length 19 [2021-02-19 17:52:41,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:52:41,503 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 336 transitions. [2021-02-19 17:52:41,503 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) [2021-02-19 17:52:41,503 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 336 transitions. [2021-02-19 17:52:41,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:52:41,503 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:52:41,503 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:52:41,703 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1876,363 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:52:41,703 INFO L428 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:52:41,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:52:41,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1344022247, now seen corresponding path program 363 times [2021-02-19 17:52:41,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:52:41,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514846074] [2021-02-19 17:52:41,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:52:41,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:52:41,939 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:52:41,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514846074] [2021-02-19 17:52:41,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463551047] [2021-02-19 17:52:41,940 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 [2021-02-19 17:52:41,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:52:41,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:52:41,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:52:41,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:52:42,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:42,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:42,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:52:42,347 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:42,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:42,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:42,354 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 16 treesize of output 12 [2021-02-19 17:52:42,357 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:42,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:42,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:42,364 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 17 treesize of output 13 [2021-02-19 17:52:42,367 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:42,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:42,373 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 [2021-02-19 17:52:42,376 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:42,472 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-02-19 17:52:42,472 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:52:42,474 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:52:42,474 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-02-19 17:52:42,554 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:52:42,554 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:52:42,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:52:42,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026695414] [2021-02-19 17:52:42,554 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:52:42,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:52:42,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:52:42,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:52:42,555 INFO L87 Difference]: Start difference. First operand 153 states and 336 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) [2021-02-19 17:52:43,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:52:43,749 INFO L93 Difference]: Finished difference Result 217 states and 451 transitions. [2021-02-19 17:52:43,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:52:43,750 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 [2021-02-19 17:52:43,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:52:43,750 INFO L225 Difference]: With dead ends: 217 [2021-02-19 17:52:43,750 INFO L226 Difference]: Without dead ends: 217 [2021-02-19 17:52:43,750 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2021-02-19 17:52:43,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-02-19 17:52:43,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 152. [2021-02-19 17:52:43,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.2119205298013247) internal successors, (334), 151 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:52:43,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 334 transitions. [2021-02-19 17:52:43,752 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 334 transitions. Word has length 19 [2021-02-19 17:52:43,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:52:43,752 INFO L480 AbstractCegarLoop]: Abstraction has 152 states and 334 transitions. [2021-02-19 17:52:43,752 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) [2021-02-19 17:52:43,752 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 334 transitions. [2021-02-19 17:52:43,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:52:43,752 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:52:43,752 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:52:43,952 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1880 [2021-02-19 17:52:43,953 INFO L428 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:52:43,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:52:43,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1876205778, now seen corresponding path program 364 times [2021-02-19 17:52:43,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:52:43,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909086207] [2021-02-19 17:52:43,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:52:43,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:52:44,198 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:52:44,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909086207] [2021-02-19 17:52:44,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252219198] [2021-02-19 17:52:44,199 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 [2021-02-19 17:52:44,216 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:52:44,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:52:44,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:52:44,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:52:44,616 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:52:44,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:52:44,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:52:44,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554866280] [2021-02-19 17:52:44,616 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:52:44,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:52:44,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:52:44,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:52:44,617 INFO L87 Difference]: Start difference. First operand 152 states and 334 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) [2021-02-19 17:52:45,413 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-02-19 17:52:45,619 WARN L202 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-02-19 17:52:45,858 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 27 [2021-02-19 17:52:45,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:52:45,914 INFO L93 Difference]: Finished difference Result 163 states and 350 transitions. [2021-02-19 17:52:45,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:52:45,916 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 [2021-02-19 17:52:45,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:52:45,916 INFO L225 Difference]: With dead ends: 163 [2021-02-19 17:52:45,916 INFO L226 Difference]: Without dead ends: 159 [2021-02-19 17:52:45,916 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:52:45,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-02-19 17:52:45,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 152. [2021-02-19 17:52:45,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.205298013245033) internal successors, (333), 151 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) [2021-02-19 17:52:45,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 333 transitions. [2021-02-19 17:52:45,918 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 333 transitions. Word has length 19 [2021-02-19 17:52:45,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:52:45,918 INFO L480 AbstractCegarLoop]: Abstraction has 152 states and 333 transitions. [2021-02-19 17:52:45,918 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) [2021-02-19 17:52:45,918 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 333 transitions. [2021-02-19 17:52:45,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:52:45,918 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:52:45,918 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:52:46,118 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1890,365 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:52:46,118 INFO L428 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:52:46,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:52:46,119 INFO L82 PathProgramCache]: Analyzing trace with hash 808792445, now seen corresponding path program 365 times [2021-02-19 17:52:46,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:52:46,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578078780] [2021-02-19 17:52:46,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:52:46,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:52:46,366 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:52:46,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578078780] [2021-02-19 17:52:46,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440807787] [2021-02-19 17:52:46,367 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 [2021-02-19 17:52:46,386 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 17:52:46,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:52:46,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:52:46,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:52:46,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:46,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:46,777 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 16 treesize of output 12 [2021-02-19 17:52:46,781 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:46,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:46,786 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 15 treesize of output 11 [2021-02-19 17:52:46,789 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:46,829 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-02-19 17:52:46,829 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:52:46,831 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:52:46,831 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-02-19 17:52:46,885 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:52:46,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:52:46,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-02-19 17:52:46,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222676885] [2021-02-19 17:52:46,886 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:52:46,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:52:46,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:52:46,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:52:46,886 INFO L87 Difference]: Start difference. First operand 152 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) [2021-02-19 17:52:47,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:52:47,731 INFO L93 Difference]: Finished difference Result 189 states and 402 transitions. [2021-02-19 17:52:47,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:52:47,734 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 [2021-02-19 17:52:47,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:52:47,734 INFO L225 Difference]: With dead ends: 189 [2021-02-19 17:52:47,734 INFO L226 Difference]: Without dead ends: 189 [2021-02-19 17:52:47,734 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2021-02-19 17:52:47,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-02-19 17:52:47,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 151. [2021-02-19 17:52:47,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.2066666666666666) internal successors, (331), 150 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) [2021-02-19 17:52:47,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 331 transitions. [2021-02-19 17:52:47,736 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 331 transitions. Word has length 19 [2021-02-19 17:52:47,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:52:47,736 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 331 transitions. [2021-02-19 17:52:47,736 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) [2021-02-19 17:52:47,736 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 331 transitions. [2021-02-19 17:52:47,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:52:47,736 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:52:47,736 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:52:47,936 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 366 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1894 [2021-02-19 17:52:47,936 INFO L428 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:52:47,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:52:47,937 INFO L82 PathProgramCache]: Analyzing trace with hash 311977398, now seen corresponding path program 366 times [2021-02-19 17:52:47,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:52:47,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255075247] [2021-02-19 17:52:47,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:52:47,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:52:48,182 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:52:48,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255075247] [2021-02-19 17:52:48,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946204340] [2021-02-19 17:52:48,182 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 [2021-02-19 17:52:48,201 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:52:48,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:52:48,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:52:48,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:52:48,573 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:52:48,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:52:48,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:52:48,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15462004] [2021-02-19 17:52:48,574 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:52:48,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:52:48,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:52:48,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:52:48,574 INFO L87 Difference]: Start difference. First operand 151 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) [2021-02-19 17:52:49,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:52:49,197 INFO L93 Difference]: Finished difference Result 160 states and 344 transitions. [2021-02-19 17:52:49,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:52:49,199 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 [2021-02-19 17:52:49,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:52:49,199 INFO L225 Difference]: With dead ends: 160 [2021-02-19 17:52:49,199 INFO L226 Difference]: Without dead ends: 154 [2021-02-19 17:52:49,200 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:52:49,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-02-19 17:52:49,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 151. [2021-02-19 17:52:49,201 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) [2021-02-19 17:52:49,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 330 transitions. [2021-02-19 17:52:49,201 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 330 transitions. Word has length 19 [2021-02-19 17:52:49,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:52:49,201 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 330 transitions. [2021-02-19 17:52:49,201 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) [2021-02-19 17:52:49,201 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 330 transitions. [2021-02-19 17:52:49,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:52:49,201 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:52:49,201 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:52:49,402 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1898,367 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:52:49,402 INFO L428 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:52:49,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:52:49,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1396537767, now seen corresponding path program 367 times [2021-02-19 17:52:49,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:52:49,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002403617] [2021-02-19 17:52:49,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:52:49,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:52:49,622 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:52:49,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002403617] [2021-02-19 17:52:49,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963962459] [2021-02-19 17:52:49,623 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 [2021-02-19 17:52:49,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:52:49,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:52:49,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:52:49,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:49,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:49,984 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 17 treesize of output 13 [2021-02-19 17:52:49,986 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:49,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:49,992 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 17 treesize of output 13 [2021-02-19 17:52:49,994 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:50,057 INFO L628 ElimStorePlain]: treesize reduction 30, result has 43.4 percent of original size [2021-02-19 17:52:50,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:50,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:52:50,064 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:52:50,080 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:52:50,082 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:52:50,082 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:67, output treesize:9 [2021-02-19 17:52:50,144 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:52:50,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:52:50,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-02-19 17:52:50,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155923627] [2021-02-19 17:52:50,145 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:52:50,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:52:50,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:52:50,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:52:50,145 INFO L87 Difference]: Start difference. First operand 151 states and 330 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) [2021-02-19 17:52:50,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:52:50,622 INFO L93 Difference]: Finished difference Result 177 states and 378 transitions. [2021-02-19 17:52:50,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:52:50,624 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 [2021-02-19 17:52:50,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:52:50,624 INFO L225 Difference]: With dead ends: 177 [2021-02-19 17:52:50,624 INFO L226 Difference]: Without dead ends: 177 [2021-02-19 17:52:50,625 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:52:50,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-02-19 17:52:50,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 143. [2021-02-19 17:52:50,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.1901408450704225) internal successors, (311), 142 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) [2021-02-19 17:52:50,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 311 transitions. [2021-02-19 17:52:50,626 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 311 transitions. Word has length 19 [2021-02-19 17:52:50,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:52:50,626 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 311 transitions. [2021-02-19 17:52:50,626 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) [2021-02-19 17:52:50,626 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 311 transitions. [2021-02-19 17:52:50,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:52:50,626 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:52:50,627 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:52:50,827 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1902,368 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:52:50,827 INFO L428 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:52:50,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:52:50,827 INFO L82 PathProgramCache]: Analyzing trace with hash -321068660, now seen corresponding path program 368 times [2021-02-19 17:52:50,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:52:50,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22806192] [2021-02-19 17:52:50,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:52:50,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:52:51,157 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:52:51,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22806192] [2021-02-19 17:52:51,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631024205] [2021-02-19 17:52:51,158 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 [2021-02-19 17:52:51,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:52:51,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:52:51,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:52:51,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:52:51,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:51,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:51,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:52:51,584 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:51,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:51,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:51,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:52:51,594 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:51,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:51,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:51,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:52:51,604 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:51,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:51,610 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 17 treesize of output 13 [2021-02-19 17:52:51,613 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:51,739 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 18 [2021-02-19 17:52:51,740 INFO L628 ElimStorePlain]: treesize reduction 79, result has 30.1 percent of original size [2021-02-19 17:52:51,740 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:52:51,743 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:52:51,743 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:133, output treesize:22 [2021-02-19 17:52:51,874 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:52:51,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:52:51,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-02-19 17:52:51,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603103819] [2021-02-19 17:52:51,874 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:52:51,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:52:51,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:52:51,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:52:51,874 INFO L87 Difference]: Start difference. First operand 143 states and 311 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) [2021-02-19 17:52:52,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:52:52,382 INFO L93 Difference]: Finished difference Result 189 states and 395 transitions. [2021-02-19 17:52:52,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:52:52,384 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 [2021-02-19 17:52:52,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:52:52,384 INFO L225 Difference]: With dead ends: 189 [2021-02-19 17:52:52,384 INFO L226 Difference]: Without dead ends: 189 [2021-02-19 17:52:52,385 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:52:52,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-02-19 17:52:52,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 146. [2021-02-19 17:52:52,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.213793103448276) internal successors, (321), 145 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:52:52,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 321 transitions. [2021-02-19 17:52:52,386 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 321 transitions. Word has length 19 [2021-02-19 17:52:52,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:52:52,386 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 321 transitions. [2021-02-19 17:52:52,386 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) [2021-02-19 17:52:52,386 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 321 transitions. [2021-02-19 17:52:52,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:52:52,387 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:52:52,387 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:52:52,587 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1903,369 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:52:52,587 INFO L428 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:52:52,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:52:52,587 INFO L82 PathProgramCache]: Analyzing trace with hash -1159889157, now seen corresponding path program 369 times [2021-02-19 17:52:52,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:52:52,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078033896] [2021-02-19 17:52:52,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:52:52,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:52:52,832 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:52:52,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078033896] [2021-02-19 17:52:52,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951058722] [2021-02-19 17:52:52,833 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 [2021-02-19 17:52:52,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 17:52:52,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:52:52,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:52:52,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:52:53,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:53,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:53,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:52:53,274 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:53,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:53,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:53,281 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 16 treesize of output 12 [2021-02-19 17:52:53,283 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:53,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:53,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:53,290 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 [2021-02-19 17:52:53,293 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:53,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:53,299 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 16 treesize of output 12 [2021-02-19 17:52:53,301 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:53,385 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-02-19 17:52:53,385 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:52:53,387 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:52:53,387 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-02-19 17:52:53,478 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:52:53,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:52:53,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:52:53,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968541704] [2021-02-19 17:52:53,479 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:52:53,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:52:53,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:52:53,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:52:53,479 INFO L87 Difference]: Start difference. First operand 146 states and 321 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) [2021-02-19 17:52:54,099 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2021-02-19 17:52:54,316 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-02-19 17:52:54,496 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2021-02-19 17:52:54,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:52:54,992 INFO L93 Difference]: Finished difference Result 200 states and 415 transitions. [2021-02-19 17:52:54,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:52:54,994 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 [2021-02-19 17:52:54,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:52:54,994 INFO L225 Difference]: With dead ends: 200 [2021-02-19 17:52:54,994 INFO L226 Difference]: Without dead ends: 197 [2021-02-19 17:52:54,995 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=111, Invalid=591, Unknown=0, NotChecked=0, Total=702 [2021-02-19 17:52:54,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-02-19 17:52:54,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 153. [2021-02-19 17:52:54,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.223684210526316) internal successors, (338), 152 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) [2021-02-19 17:52:54,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 338 transitions. [2021-02-19 17:52:54,996 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 338 transitions. Word has length 19 [2021-02-19 17:52:54,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:52:54,996 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 338 transitions. [2021-02-19 17:52:54,996 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) [2021-02-19 17:52:54,997 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 338 transitions. [2021-02-19 17:52:54,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:52:54,997 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:52:54,997 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:52:55,212 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 370 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1907 [2021-02-19 17:52:55,213 INFO L428 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:52:55,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:52:55,213 INFO L82 PathProgramCache]: Analyzing trace with hash -1842463648, now seen corresponding path program 370 times [2021-02-19 17:52:55,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:52:55,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254814260] [2021-02-19 17:52:55,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:52:55,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:52:55,504 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:52:55,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254814260] [2021-02-19 17:52:55,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044753387] [2021-02-19 17:52:55,505 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 [2021-02-19 17:52:55,522 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:52:55,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:52:55,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:52:55,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:52:56,010 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:52:56,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:52:56,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:52:56,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326498937] [2021-02-19 17:52:56,011 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:52:56,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:52:56,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:52:56,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:52:56,011 INFO L87 Difference]: Start difference. First operand 153 states and 338 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) [2021-02-19 17:52:56,612 WARN L202 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2021-02-19 17:52:56,804 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-02-19 17:52:57,025 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-02-19 17:52:57,229 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2021-02-19 17:52:57,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:52:57,537 INFO L93 Difference]: Finished difference Result 195 states and 408 transitions. [2021-02-19 17:52:57,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:52:57,538 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 [2021-02-19 17:52:57,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:52:57,539 INFO L225 Difference]: With dead ends: 195 [2021-02-19 17:52:57,539 INFO L226 Difference]: Without dead ends: 193 [2021-02-19 17:52:57,539 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:52:57,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-02-19 17:52:57,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 153. [2021-02-19 17:52:57,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.2171052631578947) internal successors, (337), 152 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) [2021-02-19 17:52:57,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 337 transitions. [2021-02-19 17:52:57,540 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 337 transitions. Word has length 19 [2021-02-19 17:52:57,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:52:57,540 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 337 transitions. [2021-02-19 17:52:57,540 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) [2021-02-19 17:52:57,541 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 337 transitions. [2021-02-19 17:52:57,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:52:57,541 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:52:57,541 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:52:57,741 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1918 [2021-02-19 17:52:57,741 INFO L428 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:52:57,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:52:57,741 INFO L82 PathProgramCache]: Analyzing trace with hash -768406383, now seen corresponding path program 371 times [2021-02-19 17:52:57,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:52:57,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699461137] [2021-02-19 17:52:57,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:52:57,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:52:57,973 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:52:57,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699461137] [2021-02-19 17:52:57,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215257598] [2021-02-19 17:52:57,973 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 [2021-02-19 17:52:57,994 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 17:52:57,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:52:57,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:52:57,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:52:58,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:58,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:58,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:52:58,312 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:58,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:58,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:58,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:52:58,318 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:58,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:58,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:58,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:52:58,324 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:58,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:58,327 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 [2021-02-19 17:52:58,328 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:58,373 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-02-19 17:52:58,374 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:52:58,375 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:52:58,375 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-02-19 17:52:58,416 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:52:58,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:52:58,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:52:58,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171617267] [2021-02-19 17:52:58,416 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:52:58,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:52:58,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:52:58,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:52:58,416 INFO L87 Difference]: Start difference. First operand 153 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) [2021-02-19 17:52:59,057 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2021-02-19 17:52:59,526 WARN L202 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2021-02-19 17:52:59,952 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2021-02-19 17:53:00,328 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-02-19 17:53:00,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:53:00,345 INFO L93 Difference]: Finished difference Result 210 states and 437 transitions. [2021-02-19 17:53:00,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:53:00,347 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 [2021-02-19 17:53:00,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:53:00,347 INFO L225 Difference]: With dead ends: 210 [2021-02-19 17:53:00,347 INFO L226 Difference]: Without dead ends: 210 [2021-02-19 17:53:00,348 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2021-02-19 17:53:00,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-02-19 17:53:00,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 152. [2021-02-19 17:53:00,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.218543046357616) internal successors, (335), 151 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) [2021-02-19 17:53:00,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 335 transitions. [2021-02-19 17:53:00,349 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 335 transitions. Word has length 19 [2021-02-19 17:53:00,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:53:00,349 INFO L480 AbstractCegarLoop]: Abstraction has 152 states and 335 transitions. [2021-02-19 17:53:00,349 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) [2021-02-19 17:53:00,349 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 335 transitions. [2021-02-19 17:53:00,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:53:00,350 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:53:00,350 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:53:00,550 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1928,372 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:53:00,550 INFO L428 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:53:00,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:53:00,550 INFO L82 PathProgramCache]: Analyzing trace with hash 306332888, now seen corresponding path program 372 times [2021-02-19 17:53:00,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:53:00,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975742003] [2021-02-19 17:53:00,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:53:00,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:53:00,887 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:53:00,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975742003] [2021-02-19 17:53:00,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87649680] [2021-02-19 17:53:00,887 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 [2021-02-19 17:53:00,908 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:53:00,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:53:00,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:53:00,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:53:01,439 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:53:01,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:53:01,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:53:01,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218172705] [2021-02-19 17:53:01,440 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:53:01,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:53:01,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:53:01,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:53:01,440 INFO L87 Difference]: Start difference. First operand 152 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) [2021-02-19 17:53:02,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:53:02,266 INFO L93 Difference]: Finished difference Result 166 states and 356 transitions. [2021-02-19 17:53:02,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:53:02,268 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 [2021-02-19 17:53:02,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:53:02,268 INFO L225 Difference]: With dead ends: 166 [2021-02-19 17:53:02,268 INFO L226 Difference]: Without dead ends: 162 [2021-02-19 17:53:02,268 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:53:02,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-02-19 17:53:02,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 152. [2021-02-19 17:53:02,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.2119205298013247) internal successors, (334), 151 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:53:02,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 334 transitions. [2021-02-19 17:53:02,270 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 334 transitions. Word has length 19 [2021-02-19 17:53:02,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:53:02,270 INFO L480 AbstractCegarLoop]: Abstraction has 152 states and 334 transitions. [2021-02-19 17:53:02,270 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) [2021-02-19 17:53:02,270 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 334 transitions. [2021-02-19 17:53:02,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:53:02,270 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:53:02,270 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:53:02,470 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1938,373 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:53:02,471 INFO L428 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:53:02,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:53:02,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1303636185, now seen corresponding path program 373 times [2021-02-19 17:53:02,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:53:02,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008906804] [2021-02-19 17:53:02,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:53:02,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:53:02,710 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:53:02,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008906804] [2021-02-19 17:53:02,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574941871] [2021-02-19 17:53:02,710 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 [2021-02-19 17:53:02,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:53:02,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:53:02,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:53:03,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:03,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:03,125 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 [2021-02-19 17:53:03,126 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:03,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:03,129 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 17 treesize of output 13 [2021-02-19 17:53:03,130 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:03,159 INFO L628 ElimStorePlain]: treesize reduction 30, result has 43.4 percent of original size [2021-02-19 17:53:03,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:03,162 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 9 treesize of output 5 [2021-02-19 17:53:03,164 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:53:03,171 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:53:03,172 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:53:03,172 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:67, output treesize:9 [2021-02-19 17:53:03,203 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:53:03,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:53:03,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-02-19 17:53:03,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128517270] [2021-02-19 17:53:03,203 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:53:03,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:53:03,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:53:03,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:53:03,203 INFO L87 Difference]: Start difference. First operand 152 states and 334 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) [2021-02-19 17:53:03,627 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2021-02-19 17:53:03,875 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2021-02-19 17:53:04,045 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2021-02-19 17:53:04,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:53:04,560 INFO L93 Difference]: Finished difference Result 197 states and 418 transitions. [2021-02-19 17:53:04,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:53:04,562 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 [2021-02-19 17:53:04,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:53:04,563 INFO L225 Difference]: With dead ends: 197 [2021-02-19 17:53:04,563 INFO L226 Difference]: Without dead ends: 197 [2021-02-19 17:53:04,563 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:53:04,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-02-19 17:53:04,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 151. [2021-02-19 17:53:04,564 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) [2021-02-19 17:53:04,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 332 transitions. [2021-02-19 17:53:04,565 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 332 transitions. Word has length 19 [2021-02-19 17:53:04,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:53:04,565 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 332 transitions. [2021-02-19 17:53:04,565 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) [2021-02-19 17:53:04,565 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 332 transitions. [2021-02-19 17:53:04,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:53:04,565 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:53:04,565 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:53:04,765 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1942 [2021-02-19 17:53:04,765 INFO L428 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:53:04,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:53:04,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1800451232, now seen corresponding path program 374 times [2021-02-19 17:53:04,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:53:04,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806447729] [2021-02-19 17:53:04,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:53:04,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:53:05,050 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:53:05,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806447729] [2021-02-19 17:53:05,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115823839] [2021-02-19 17:53:05,051 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 [2021-02-19 17:53:05,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:53:05,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:53:05,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:53:05,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:53:05,533 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:53:05,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:53:05,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:53:05,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106737037] [2021-02-19 17:53:05,534 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:53:05,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:53:05,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:53:05,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:53:05,534 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) [2021-02-19 17:53:05,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:53:05,843 INFO L93 Difference]: Finished difference Result 164 states and 351 transitions. [2021-02-19 17:53:05,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:53:05,844 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 [2021-02-19 17:53:05,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:53:05,844 INFO L225 Difference]: With dead ends: 164 [2021-02-19 17:53:05,844 INFO L226 Difference]: Without dead ends: 158 [2021-02-19 17:53:05,844 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:53:05,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-02-19 17:53:05,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 151. [2021-02-19 17:53:05,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.2066666666666666) internal successors, (331), 150 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) [2021-02-19 17:53:05,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 331 transitions. [2021-02-19 17:53:05,846 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 331 transitions. Word has length 19 [2021-02-19 17:53:05,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:53:05,846 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 331 transitions. [2021-02-19 17:53:05,846 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) [2021-02-19 17:53:05,846 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 331 transitions. [2021-02-19 17:53:05,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:53:05,846 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:53:05,846 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:53:06,046 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1943,375 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:53:06,046 INFO L428 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:53:06,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:53:06,047 INFO L82 PathProgramCache]: Analyzing trace with hash -715890863, now seen corresponding path program 375 times [2021-02-19 17:53:06,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:53:06,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38806273] [2021-02-19 17:53:06,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:53:06,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:53:06,267 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:53:06,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38806273] [2021-02-19 17:53:06,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070226365] [2021-02-19 17:53:06,267 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 [2021-02-19 17:53:06,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:53:06,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:53:06,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:53:06,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:53:06,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:06,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:06,660 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 17 treesize of output 13 [2021-02-19 17:53:06,663 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:06,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:06,668 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 17 treesize of output 13 [2021-02-19 17:53:06,672 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:06,734 INFO L628 ElimStorePlain]: treesize reduction 30, result has 43.4 percent of original size [2021-02-19 17:53:06,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:06,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:53:06,743 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:53:06,756 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:53:06,758 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:53:06,758 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:67, output treesize:9 [2021-02-19 17:53:06,816 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:53:06,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:53:06,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-02-19 17:53:06,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891329735] [2021-02-19 17:53:06,816 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:53:06,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:53:06,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:53:06,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:53:06,817 INFO L87 Difference]: Start difference. First operand 151 states and 331 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) [2021-02-19 17:53:07,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:53:07,824 INFO L93 Difference]: Finished difference Result 190 states and 405 transitions. [2021-02-19 17:53:07,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:53:07,827 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 [2021-02-19 17:53:07,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:53:07,827 INFO L225 Difference]: With dead ends: 190 [2021-02-19 17:53:07,827 INFO L226 Difference]: Without dead ends: 190 [2021-02-19 17:53:07,827 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:53:07,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-02-19 17:53:07,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 150. [2021-02-19 17:53:07,829 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) [2021-02-19 17:53:07,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 329 transitions. [2021-02-19 17:53:07,829 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 329 transitions. Word has length 19 [2021-02-19 17:53:07,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:53:07,829 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 329 transitions. [2021-02-19 17:53:07,829 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) [2021-02-19 17:53:07,829 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 329 transitions. [2021-02-19 17:53:07,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:53:07,829 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:53:07,829 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:53:08,030 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1947 [2021-02-19 17:53:08,030 INFO L428 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:53:08,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:53:08,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1608717784, now seen corresponding path program 376 times [2021-02-19 17:53:08,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:53:08,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654449969] [2021-02-19 17:53:08,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:53:08,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:53:08,330 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:53:08,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654449969] [2021-02-19 17:53:08,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973063611] [2021-02-19 17:53:08,330 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 [2021-02-19 17:53:08,349 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:53:08,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:53:08,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:53:08,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:53:08,769 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:53:08,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:53:08,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:53:08,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897470111] [2021-02-19 17:53:08,770 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:53:08,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:53:08,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:53:08,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:53:08,770 INFO L87 Difference]: Start difference. First operand 150 states and 329 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) [2021-02-19 17:53:09,148 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-02-19 17:53:09,362 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 28 [2021-02-19 17:53:09,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:53:09,621 INFO L93 Difference]: Finished difference Result 161 states and 345 transitions. [2021-02-19 17:53:09,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:53:09,624 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 [2021-02-19 17:53:09,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:53:09,624 INFO L225 Difference]: With dead ends: 161 [2021-02-19 17:53:09,624 INFO L226 Difference]: Without dead ends: 153 [2021-02-19 17:53:09,625 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:53:09,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-02-19 17:53:09,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 150. [2021-02-19 17:53:09,626 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) [2021-02-19 17:53:09,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 328 transitions. [2021-02-19 17:53:09,626 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 328 transitions. Word has length 19 [2021-02-19 17:53:09,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:53:09,626 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 328 transitions. [2021-02-19 17:53:09,626 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) [2021-02-19 17:53:09,626 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 328 transitions. [2021-02-19 17:53:09,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:53:09,626 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:53:09,626 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:53:09,827 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1948,377 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:53:09,827 INFO L428 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:53:09,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:53:09,827 INFO L82 PathProgramCache]: Analyzing trace with hash 324344935, now seen corresponding path program 377 times [2021-02-19 17:53:09,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:53:09,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486163413] [2021-02-19 17:53:09,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:53:09,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:53:10,067 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:53:10,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486163413] [2021-02-19 17:53:10,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760444972] [2021-02-19 17:53:10,067 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 [2021-02-19 17:53:10,087 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 17:53:10,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:53:10,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:53:10,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:53:10,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:10,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:10,497 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 16 treesize of output 12 [2021-02-19 17:53:10,500 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:10,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:10,506 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 15 treesize of output 11 [2021-02-19 17:53:10,509 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:10,551 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-02-19 17:53:10,552 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:53:10,553 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:53:10,554 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-02-19 17:53:10,577 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:53:10,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:53:10,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:53:10,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831555199] [2021-02-19 17:53:10,578 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:53:10,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:53:10,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:53:10,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:53:10,578 INFO L87 Difference]: Start difference. First operand 150 states and 328 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) [2021-02-19 17:53:10,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:53:10,915 INFO L93 Difference]: Finished difference Result 167 states and 358 transitions. [2021-02-19 17:53:10,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:53:10,917 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 [2021-02-19 17:53:10,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:53:10,918 INFO L225 Difference]: With dead ends: 167 [2021-02-19 17:53:10,918 INFO L226 Difference]: Without dead ends: 167 [2021-02-19 17:53:10,918 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:53:10,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-02-19 17:53:10,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 144. [2021-02-19 17:53:10,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.1888111888111887) internal successors, (313), 143 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) [2021-02-19 17:53:10,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 313 transitions. [2021-02-19 17:53:10,919 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 313 transitions. Word has length 19 [2021-02-19 17:53:10,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:53:10,919 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 313 transitions. [2021-02-19 17:53:10,919 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) [2021-02-19 17:53:10,919 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 313 transitions. [2021-02-19 17:53:10,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:53:10,920 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:53:10,920 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:53:11,123 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 378 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1952 [2021-02-19 17:53:11,123 INFO L428 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:53:11,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:53:11,127 INFO L82 PathProgramCache]: Analyzing trace with hash -428709442, now seen corresponding path program 378 times [2021-02-19 17:53:11,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:53:11,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261091192] [2021-02-19 17:53:11,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:53:11,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:53:11,387 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:53:11,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261091192] [2021-02-19 17:53:11,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832444367] [2021-02-19 17:53:11,387 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 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 [2021-02-19 17:53:11,408 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:53:11,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:53:11,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:53:11,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:53:11,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:11,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:11,822 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 17 treesize of output 13 [2021-02-19 17:53:11,825 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:11,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:11,832 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 [2021-02-19 17:53:11,835 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:11,893 INFO L628 ElimStorePlain]: treesize reduction 36, result has 32.1 percent of original size [2021-02-19 17:53:11,893 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:53:11,895 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:53:11,895 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:67, output treesize:9 [2021-02-19 17:53:11,963 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:53:11,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:53:11,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-02-19 17:53:11,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876980430] [2021-02-19 17:53:11,964 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:53:11,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:53:11,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:53:11,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:53:11,964 INFO L87 Difference]: Start difference. First operand 144 states and 313 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) [2021-02-19 17:53:12,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:53:12,314 INFO L93 Difference]: Finished difference Result 160 states and 345 transitions. [2021-02-19 17:53:12,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:53:12,315 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 [2021-02-19 17:53:12,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:53:12,315 INFO L225 Difference]: With dead ends: 160 [2021-02-19 17:53:12,315 INFO L226 Difference]: Without dead ends: 160 [2021-02-19 17:53:12,315 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:53:12,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-02-19 17:53:12,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 144. [2021-02-19 17:53:12,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.1888111888111887) internal successors, (313), 143 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) [2021-02-19 17:53:12,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 313 transitions. [2021-02-19 17:53:12,317 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 313 transitions. Word has length 19 [2021-02-19 17:53:12,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:53:12,317 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 313 transitions. [2021-02-19 17:53:12,317 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) [2021-02-19 17:53:12,317 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 313 transitions. [2021-02-19 17:53:12,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:53:12,317 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:53:12,317 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:53:12,529 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1956,379 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:53:12,530 INFO L428 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:53:12,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:53:12,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1130649878, now seen corresponding path program 379 times [2021-02-19 17:53:12,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:53:12,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426778767] [2021-02-19 17:53:12,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:53:12,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:53:12,780 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:53:12,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426778767] [2021-02-19 17:53:12,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996588361] [2021-02-19 17:53:12,780 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 [2021-02-19 17:53:12,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:53:12,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:53:12,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:53:13,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:13,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:13,207 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 17 treesize of output 13 [2021-02-19 17:53:13,210 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:13,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:13,216 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 17 treesize of output 13 [2021-02-19 17:53:13,218 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:13,274 INFO L628 ElimStorePlain]: treesize reduction 38, result has 30.9 percent of original size [2021-02-19 17:53:13,274 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:53:13,276 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:53:13,276 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:67, output treesize:9 [2021-02-19 17:53:13,331 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:53:13,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:53:13,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-02-19 17:53:13,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827444800] [2021-02-19 17:53:13,332 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:53:13,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:53:13,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:53:13,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:53:13,332 INFO L87 Difference]: Start difference. First operand 144 states and 313 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) [2021-02-19 17:53:14,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:53:14,503 INFO L93 Difference]: Finished difference Result 182 states and 389 transitions. [2021-02-19 17:53:14,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:53:14,504 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 [2021-02-19 17:53:14,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:53:14,505 INFO L225 Difference]: With dead ends: 182 [2021-02-19 17:53:14,505 INFO L226 Difference]: Without dead ends: 182 [2021-02-19 17:53:14,505 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:53:14,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-02-19 17:53:14,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 145. [2021-02-19 17:53:14,506 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) [2021-02-19 17:53:14,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 315 transitions. [2021-02-19 17:53:14,506 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 315 transitions. Word has length 19 [2021-02-19 17:53:14,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:53:14,507 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 315 transitions. [2021-02-19 17:53:14,507 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) [2021-02-19 17:53:14,507 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 315 transitions. [2021-02-19 17:53:14,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:53:14,507 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:53:14,507 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:53:14,707 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1957,380 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:53:14,707 INFO L428 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:53:14,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:53:14,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1291840450, now seen corresponding path program 380 times [2021-02-19 17:53:14,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:53:14,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813853629] [2021-02-19 17:53:14,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:53:14,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:53:14,998 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:53:14,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813853629] [2021-02-19 17:53:14,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266394967] [2021-02-19 17:53:14,998 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 [2021-02-19 17:53:15,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:53:15,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:53:15,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:53:15,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:53:15,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:15,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:15,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:53:15,469 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:15,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:15,475 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 17 treesize of output 13 [2021-02-19 17:53:15,478 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:15,534 INFO L628 ElimStorePlain]: treesize reduction 36, result has 32.1 percent of original size [2021-02-19 17:53:15,534 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:53:15,535 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:53:15,536 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:67, output treesize:9 [2021-02-19 17:53:15,590 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:53:15,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:53:15,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-02-19 17:53:15,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262518562] [2021-02-19 17:53:15,591 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:53:15,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:53:15,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:53:15,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:53:15,591 INFO L87 Difference]: Start difference. First operand 145 states and 315 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) [2021-02-19 17:53:16,103 WARN L202 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2021-02-19 17:53:16,392 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2021-02-19 17:53:16,531 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2021-02-19 17:53:17,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:53:17,146 INFO L93 Difference]: Finished difference Result 189 states and 402 transitions. [2021-02-19 17:53:17,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:53:17,149 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 [2021-02-19 17:53:17,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:53:17,149 INFO L225 Difference]: With dead ends: 189 [2021-02-19 17:53:17,149 INFO L226 Difference]: Without dead ends: 189 [2021-02-19 17:53:17,149 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:53:17,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-02-19 17:53:17,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 146. [2021-02-19 17:53:17,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.1862068965517243) internal successors, (317), 145 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:53:17,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 317 transitions. [2021-02-19 17:53:17,151 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 317 transitions. Word has length 19 [2021-02-19 17:53:17,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:53:17,151 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 317 transitions. [2021-02-19 17:53:17,151 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) [2021-02-19 17:53:17,151 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 317 transitions. [2021-02-19 17:53:17,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:53:17,151 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:53:17,151 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:53:17,351 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1958,381 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:53:17,352 INFO L428 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:53:17,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:53:17,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1640825162, now seen corresponding path program 381 times [2021-02-19 17:53:17,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:53:17,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76812897] [2021-02-19 17:53:17,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:53:17,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:53:17,621 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:53:17,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76812897] [2021-02-19 17:53:17,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516644540] [2021-02-19 17:53:17,621 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 [2021-02-19 17:53:17,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:53:17,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:53:17,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:53:17,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:53:18,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:18,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:18,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:53:18,030 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:18,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:18,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:18,037 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 18 treesize of output 14 [2021-02-19 17:53:18,041 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:18,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:18,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:18,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:53:18,052 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:18,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:18,058 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 [2021-02-19 17:53:18,062 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:18,190 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 19 [2021-02-19 17:53:18,191 INFO L628 ElimStorePlain]: treesize reduction 81, result has 31.9 percent of original size [2021-02-19 17:53:18,192 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:53:18,194 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:53:18,194 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:141, output treesize:22 [2021-02-19 17:53:18,332 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:53:18,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:53:18,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-02-19 17:53:18,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697305293] [2021-02-19 17:53:18,333 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:53:18,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:53:18,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:53:18,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:53:18,333 INFO L87 Difference]: Start difference. First operand 146 states and 317 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) [2021-02-19 17:53:18,838 WARN L202 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2021-02-19 17:53:19,364 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2021-02-19 17:53:19,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:53:19,820 INFO L93 Difference]: Finished difference Result 192 states and 408 transitions. [2021-02-19 17:53:19,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:53:19,823 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 [2021-02-19 17:53:19,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:53:19,823 INFO L225 Difference]: With dead ends: 192 [2021-02-19 17:53:19,823 INFO L226 Difference]: Without dead ends: 192 [2021-02-19 17:53:19,823 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2021-02-19 17:53:19,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-02-19 17:53:19,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 147. [2021-02-19 17:53:19,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.184931506849315) internal successors, (319), 146 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:53:19,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 319 transitions. [2021-02-19 17:53:19,825 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 319 transitions. Word has length 19 [2021-02-19 17:53:19,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:53:19,825 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 319 transitions. [2021-02-19 17:53:19,825 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) [2021-02-19 17:53:19,825 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 319 transitions. [2021-02-19 17:53:19,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:53:19,825 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:53:19,825 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:53:20,025 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1959,382 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:53:20,026 INFO L428 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:53:20,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:53:20,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1882925201, now seen corresponding path program 382 times [2021-02-19 17:53:20,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:53:20,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889359339] [2021-02-19 17:53:20,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:53:20,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:53:20,410 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:53:20,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889359339] [2021-02-19 17:53:20,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204038956] [2021-02-19 17:53:20,410 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 [2021-02-19 17:53:20,434 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:53:20,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:53:20,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:53:20,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:53:20,982 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:53:20,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:53:20,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:53:20,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168085883] [2021-02-19 17:53:20,983 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:53:20,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:53:20,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:53:20,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:53:20,983 INFO L87 Difference]: Start difference. First operand 147 states and 319 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) [2021-02-19 17:53:21,399 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-02-19 17:53:21,628 WARN L202 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-02-19 17:53:21,957 WARN L202 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-02-19 17:53:22,243 WARN L202 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-02-19 17:53:22,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:53:22,349 INFO L93 Difference]: Finished difference Result 160 states and 346 transitions. [2021-02-19 17:53:22,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:53:22,352 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 [2021-02-19 17:53:22,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:53:22,352 INFO L225 Difference]: With dead ends: 160 [2021-02-19 17:53:22,352 INFO L226 Difference]: Without dead ends: 160 [2021-02-19 17:53:22,353 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:53:22,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-02-19 17:53:22,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 143. [2021-02-19 17:53:22,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.1901408450704225) internal successors, (311), 142 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) [2021-02-19 17:53:22,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 311 transitions. [2021-02-19 17:53:22,354 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 311 transitions. Word has length 19 [2021-02-19 17:53:22,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:53:22,354 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 311 transitions. [2021-02-19 17:53:22,354 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) [2021-02-19 17:53:22,354 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 311 transitions. [2021-02-19 17:53:22,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:53:22,354 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:53:22,354 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:53:22,555 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 383 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1962 [2021-02-19 17:53:22,555 INFO L428 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:53:22,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:53:22,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1051888788, now seen corresponding path program 383 times [2021-02-19 17:53:22,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:53:22,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081320069] [2021-02-19 17:53:22,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:53:22,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:53:22,791 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:53:22,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081320069] [2021-02-19 17:53:22,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543274749] [2021-02-19 17:53:22,792 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 [2021-02-19 17:53:22,818 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:53:22,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:53:22,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:53:22,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:53:23,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:23,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:23,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:53:23,241 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:23,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:23,247 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 16 treesize of output 12 [2021-02-19 17:53:23,250 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:23,297 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-02-19 17:53:23,298 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:53:23,299 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:53:23,300 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-02-19 17:53:23,314 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:53:23,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:53:23,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:53:23,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467579980] [2021-02-19 17:53:23,315 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:53:23,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:53:23,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:53:23,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:53:23,315 INFO L87 Difference]: Start difference. First operand 143 states and 311 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) [2021-02-19 17:53:23,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:53:23,812 INFO L93 Difference]: Finished difference Result 170 states and 365 transitions. [2021-02-19 17:53:23,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:53:23,814 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 [2021-02-19 17:53:23,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:53:23,815 INFO L225 Difference]: With dead ends: 170 [2021-02-19 17:53:23,815 INFO L226 Difference]: Without dead ends: 170 [2021-02-19 17:53:23,815 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:53:23,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-02-19 17:53:23,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 143. [2021-02-19 17:53:23,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.1901408450704225) internal successors, (311), 142 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) [2021-02-19 17:53:23,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 311 transitions. [2021-02-19 17:53:23,816 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 311 transitions. Word has length 19 [2021-02-19 17:53:23,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:53:23,816 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 311 transitions. [2021-02-19 17:53:23,816 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) [2021-02-19 17:53:23,816 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 311 transitions. [2021-02-19 17:53:23,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:53:23,817 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:53:23,817 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:53:24,032 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 384 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1972 [2021-02-19 17:53:24,032 INFO L428 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:53:24,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:53:24,033 INFO L82 PathProgramCache]: Analyzing trace with hash 890698216, now seen corresponding path program 384 times [2021-02-19 17:53:24,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:53:24,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199873119] [2021-02-19 17:53:24,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:53:24,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:53:24,282 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:53:24,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199873119] [2021-02-19 17:53:24,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047036576] [2021-02-19 17:53:24,282 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 [2021-02-19 17:53:24,303 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:53:24,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:53:24,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:53:24,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:53:24,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:24,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:24,742 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 16 treesize of output 12 [2021-02-19 17:53:24,745 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:24,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:24,750 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 15 treesize of output 11 [2021-02-19 17:53:24,753 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:24,793 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-02-19 17:53:24,794 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:53:24,795 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:53:24,795 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-02-19 17:53:24,808 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:53:24,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:53:24,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:53:24,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522505804] [2021-02-19 17:53:24,809 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:53:24,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:53:24,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:53:24,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:53:24,809 INFO L87 Difference]: Start difference. First operand 143 states and 311 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) [2021-02-19 17:53:26,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:53:26,145 INFO L93 Difference]: Finished difference Result 188 states and 400 transitions. [2021-02-19 17:53:26,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:53:26,148 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 [2021-02-19 17:53:26,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:53:26,149 INFO L225 Difference]: With dead ends: 188 [2021-02-19 17:53:26,149 INFO L226 Difference]: Without dead ends: 188 [2021-02-19 17:53:26,149 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:53:26,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-02-19 17:53:26,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 143. [2021-02-19 17:53:26,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.1901408450704225) internal successors, (311), 142 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) [2021-02-19 17:53:26,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 311 transitions. [2021-02-19 17:53:26,150 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 311 transitions. Word has length 19 [2021-02-19 17:53:26,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:53:26,150 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 311 transitions. [2021-02-19 17:53:26,150 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) [2021-02-19 17:53:26,150 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 311 transitions. [2021-02-19 17:53:26,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:53:26,151 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:53:26,151 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:53:26,351 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1976,385 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:53:26,351 INFO L428 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:53:26,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:53:26,351 INFO L82 PathProgramCache]: Analyzing trace with hash 657066585, now seen corresponding path program 385 times [2021-02-19 17:53:26,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:53:26,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805485360] [2021-02-19 17:53:26,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:53:26,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:53:26,692 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:53:26,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805485360] [2021-02-19 17:53:26,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849279322] [2021-02-19 17:53:26,692 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 [2021-02-19 17:53:26,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:53:26,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:53:26,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:53:27,189 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:53:27,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:53:27,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:53:27,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673656982] [2021-02-19 17:53:27,190 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:53:27,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:53:27,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:53:27,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:53:27,190 INFO L87 Difference]: Start difference. First operand 143 states and 311 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) [2021-02-19 17:53:27,619 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-02-19 17:53:27,826 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2021-02-19 17:53:28,070 WARN L202 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-02-19 17:53:28,362 WARN L202 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-02-19 17:53:28,620 WARN L202 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 27 [2021-02-19 17:53:28,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:53:28,687 INFO L93 Difference]: Finished difference Result 149 states and 318 transitions. [2021-02-19 17:53:28,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:53:28,689 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 [2021-02-19 17:53:28,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:53:28,690 INFO L225 Difference]: With dead ends: 149 [2021-02-19 17:53:28,690 INFO L226 Difference]: Without dead ends: 143 [2021-02-19 17:53:28,690 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:53:28,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-02-19 17:53:28,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2021-02-19 17:53:28,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.183098591549296) internal successors, (310), 142 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) [2021-02-19 17:53:28,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 310 transitions. [2021-02-19 17:53:28,691 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 310 transitions. Word has length 19 [2021-02-19 17:53:28,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:53:28,691 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 310 transitions. [2021-02-19 17:53:28,691 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) [2021-02-19 17:53:28,691 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 310 transitions. [2021-02-19 17:53:28,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:53:28,692 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:53:28,692 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:53:28,892 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 386 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1980 [2021-02-19 17:53:28,892 INFO L428 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:53:28,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:53:28,892 INFO L82 PathProgramCache]: Analyzing trace with hash 541713504, now seen corresponding path program 386 times [2021-02-19 17:53:28,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:53:28,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48573647] [2021-02-19 17:53:28,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:53:28,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:53:29,137 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:53:29,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48573647] [2021-02-19 17:53:29,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759959985] [2021-02-19 17:53:29,137 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 [2021-02-19 17:53:29,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:53:29,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:53:29,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:53:29,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:53:29,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:29,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:29,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:53:29,513 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:29,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:29,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:29,521 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 [2021-02-19 17:53:29,524 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:29,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:29,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:29,532 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 17 treesize of output 13 [2021-02-19 17:53:29,534 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:29,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:29,540 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 18 treesize of output 14 [2021-02-19 17:53:29,543 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:29,673 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 19 [2021-02-19 17:53:29,674 INFO L628 ElimStorePlain]: treesize reduction 79, result has 32.5 percent of original size [2021-02-19 17:53:29,674 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:53:29,676 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:53:29,677 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:141, output treesize:22 [2021-02-19 17:53:29,829 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:53:29,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:53:29,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-02-19 17:53:29,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256821510] [2021-02-19 17:53:29,829 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:53:29,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:53:29,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:53:29,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:53:29,830 INFO L87 Difference]: Start difference. First operand 143 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) [2021-02-19 17:53:30,170 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2021-02-19 17:53:30,746 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2021-02-19 17:53:31,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:53:31,379 INFO L93 Difference]: Finished difference Result 197 states and 418 transitions. [2021-02-19 17:53:31,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:53:31,382 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 [2021-02-19 17:53:31,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:53:31,382 INFO L225 Difference]: With dead ends: 197 [2021-02-19 17:53:31,382 INFO L226 Difference]: Without dead ends: 197 [2021-02-19 17:53:31,383 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:53:31,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-02-19 17:53:31,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 144. [2021-02-19 17:53:31,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.1818181818181817) internal successors, (312), 143 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:53:31,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 312 transitions. [2021-02-19 17:53:31,384 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 312 transitions. Word has length 19 [2021-02-19 17:53:31,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:53:31,384 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 312 transitions. [2021-02-19 17:53:31,384 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) [2021-02-19 17:53:31,384 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 312 transitions. [2021-02-19 17:53:31,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:53:31,385 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:53:31,385 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:53:31,585 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1984,387 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:53:31,585 INFO L428 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:53:31,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:53:31,585 INFO L82 PathProgramCache]: Analyzing trace with hash 299613465, now seen corresponding path program 387 times [2021-02-19 17:53:31,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:53:31,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011689788] [2021-02-19 17:53:31,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:53:31,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:53:31,920 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:53:31,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011689788] [2021-02-19 17:53:31,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187537738] [2021-02-19 17:53:31,920 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 [2021-02-19 17:53:31,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:53:31,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:53:31,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:53:31,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:53:32,449 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:53:32,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:53:32,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:53:32,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75150892] [2021-02-19 17:53:32,450 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:53:32,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:53:32,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:53:32,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:53:32,450 INFO L87 Difference]: Start difference. First operand 144 states and 312 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) [2021-02-19 17:53:32,851 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2021-02-19 17:53:33,136 WARN L202 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-02-19 17:53:33,409 WARN L202 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-02-19 17:53:33,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:53:33,516 INFO L93 Difference]: Finished difference Result 157 states and 339 transitions. [2021-02-19 17:53:33,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:53:33,518 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 [2021-02-19 17:53:33,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:53:33,518 INFO L225 Difference]: With dead ends: 157 [2021-02-19 17:53:33,518 INFO L226 Difference]: Without dead ends: 157 [2021-02-19 17:53:33,519 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:53:33,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-02-19 17:53:33,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 141. [2021-02-19 17:53:33,520 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) [2021-02-19 17:53:33,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 306 transitions. [2021-02-19 17:53:33,520 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 306 transitions. Word has length 19 [2021-02-19 17:53:33,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:53:33,520 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 306 transitions. [2021-02-19 17:53:33,520 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) [2021-02-19 17:53:33,520 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 306 transitions. [2021-02-19 17:53:33,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:53:33,520 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:53:33,520 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:53:33,721 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 388 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1987 [2021-02-19 17:53:33,721 INFO L428 AbstractCegarLoop]: === Iteration 394 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:53:33,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:53:33,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1930934014, now seen corresponding path program 388 times [2021-02-19 17:53:33,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:53:33,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861199557] [2021-02-19 17:53:33,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:53:33,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:53:33,977 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:53:33,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861199557] [2021-02-19 17:53:33,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129385018] [2021-02-19 17:53:33,978 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 [2021-02-19 17:53:33,996 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:53:33,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:53:33,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:53:33,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:53:34,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:34,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:34,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:53:34,394 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:34,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:34,399 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 15 treesize of output 11 [2021-02-19 17:53:34,403 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:34,448 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-02-19 17:53:34,448 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:53:34,450 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:53:34,451 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-02-19 17:53:34,467 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:53:34,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:53:34,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:53:34,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289264697] [2021-02-19 17:53:34,468 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:53:34,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:53:34,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:53:34,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:53:34,468 INFO L87 Difference]: Start difference. First operand 141 states and 306 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) [2021-02-19 17:53:35,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:53:35,205 INFO L93 Difference]: Finished difference Result 170 states and 364 transitions. [2021-02-19 17:53:35,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:53:35,207 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 [2021-02-19 17:53:35,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:53:35,207 INFO L225 Difference]: With dead ends: 170 [2021-02-19 17:53:35,208 INFO L226 Difference]: Without dead ends: 170 [2021-02-19 17:53:35,208 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:53:35,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-02-19 17:53:35,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 141. [2021-02-19 17:53:35,209 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) [2021-02-19 17:53:35,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 306 transitions. [2021-02-19 17:53:35,209 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 306 transitions. Word has length 19 [2021-02-19 17:53:35,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:53:35,209 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 306 transitions. [2021-02-19 17:53:35,209 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) [2021-02-19 17:53:35,209 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 306 transitions. [2021-02-19 17:53:35,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:53:35,209 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:53:35,210 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:53:35,410 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1997,389 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:53:35,410 INFO L428 AbstractCegarLoop]: === Iteration 395 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:53:35,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:53:35,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1787186986, now seen corresponding path program 389 times [2021-02-19 17:53:35,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:53:35,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959108977] [2021-02-19 17:53:35,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:53:35,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:53:35,687 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:53:35,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959108977] [2021-02-19 17:53:35,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110984442] [2021-02-19 17:53:35,688 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 [2021-02-19 17:53:35,706 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 17:53:35,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:53:35,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:53:35,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:53:36,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:36,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:36,101 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 [2021-02-19 17:53:36,104 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:36,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:36,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:36,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:53:36,114 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:36,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:36,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:36,122 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 16 treesize of output 12 [2021-02-19 17:53:36,124 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:36,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:36,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:53:36,134 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:36,243 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 15 [2021-02-19 17:53:36,244 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-02-19 17:53:36,244 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:53:36,246 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:53:36,246 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-02-19 17:53:36,348 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:53:36,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:53:36,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:53:36,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422115263] [2021-02-19 17:53:36,348 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:53:36,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:53:36,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:53:36,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:53:36,349 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) [2021-02-19 17:53:37,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:53:37,368 INFO L93 Difference]: Finished difference Result 185 states and 394 transitions. [2021-02-19 17:53:37,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:53:37,371 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 [2021-02-19 17:53:37,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:53:37,372 INFO L225 Difference]: With dead ends: 185 [2021-02-19 17:53:37,372 INFO L226 Difference]: Without dead ends: 185 [2021-02-19 17:53:37,372 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:53:37,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-02-19 17:53:37,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 141. [2021-02-19 17:53:37,373 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) [2021-02-19 17:53:37,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 306 transitions. [2021-02-19 17:53:37,373 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 306 transitions. Word has length 19 [2021-02-19 17:53:37,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:53:37,373 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 306 transitions. [2021-02-19 17:53:37,373 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) [2021-02-19 17:53:37,374 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 306 transitions. [2021-02-19 17:53:37,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:53:37,374 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:53:37,374 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:53:37,574 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 390 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2001 [2021-02-19 17:53:37,574 INFO L428 AbstractCegarLoop]: === Iteration 396 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:53:37,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:53:37,574 INFO L82 PathProgramCache]: Analyzing trace with hash 948366489, now seen corresponding path program 390 times [2021-02-19 17:53:37,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:53:37,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892354291] [2021-02-19 17:53:37,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:53:37,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:53:37,845 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:53:37,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892354291] [2021-02-19 17:53:37,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240661245] [2021-02-19 17:53:37,845 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 [2021-02-19 17:53:37,864 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:53:37,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:53:37,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:53:37,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:53:38,313 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:53:38,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:53:38,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:53:38,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219466113] [2021-02-19 17:53:38,314 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:53:38,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:53:38,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:53:38,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:53:38,314 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) [2021-02-19 17:53:39,175 WARN L202 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2021-02-19 17:53:39,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:53:39,518 INFO L93 Difference]: Finished difference Result 172 states and 360 transitions. [2021-02-19 17:53:39,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:53:39,520 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 [2021-02-19 17:53:39,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:53:39,520 INFO L225 Difference]: With dead ends: 172 [2021-02-19 17:53:39,520 INFO L226 Difference]: Without dead ends: 169 [2021-02-19 17:53:39,520 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:53:39,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-02-19 17:53:39,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 146. [2021-02-19 17:53:39,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.1862068965517243) internal successors, (317), 145 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:53:39,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 317 transitions. [2021-02-19 17:53:39,522 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 317 transitions. Word has length 19 [2021-02-19 17:53:39,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:53:39,522 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 317 transitions. [2021-02-19 17:53:39,522 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) [2021-02-19 17:53:39,522 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 317 transitions. [2021-02-19 17:53:39,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:53:39,522 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:53:39,522 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:53:39,722 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2011,391 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:53:39,723 INFO L428 AbstractCegarLoop]: === Iteration 397 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:53:39,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:53:39,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1339849263, now seen corresponding path program 391 times [2021-02-19 17:53:39,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:53:39,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133585474] [2021-02-19 17:53:39,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:53:39,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:53:40,022 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:53:40,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133585474] [2021-02-19 17:53:40,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344171952] [2021-02-19 17:53:40,023 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 [2021-02-19 17:53:40,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:53:40,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:53:40,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:53:40,499 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:53:40,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:53:40,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:53:40,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050344078] [2021-02-19 17:53:40,499 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:53:40,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:53:40,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:53:40,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:53:40,500 INFO L87 Difference]: Start difference. First operand 146 states and 317 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) [2021-02-19 17:53:41,026 WARN L202 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-02-19 17:53:41,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:53:41,134 INFO L93 Difference]: Finished difference Result 157 states and 339 transitions. [2021-02-19 17:53:41,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:53:41,136 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 [2021-02-19 17:53:41,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:53:41,136 INFO L225 Difference]: With dead ends: 157 [2021-02-19 17:53:41,136 INFO L226 Difference]: Without dead ends: 157 [2021-02-19 17:53:41,136 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:53:41,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-02-19 17:53:41,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 140. [2021-02-19 17:53:41,138 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) [2021-02-19 17:53:41,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 304 transitions. [2021-02-19 17:53:41,138 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 304 transitions. Word has length 19 [2021-02-19 17:53:41,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:53:41,138 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 304 transitions. [2021-02-19 17:53:41,138 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) [2021-02-19 17:53:41,138 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 304 transitions. [2021-02-19 17:53:41,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:53:41,138 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:53:41,138 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:53:41,338 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2021,392 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:53:41,339 INFO L428 AbstractCegarLoop]: === Iteration 398 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:53:41,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:53:41,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1920034988, now seen corresponding path program 392 times [2021-02-19 17:53:41,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:53:41,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921114233] [2021-02-19 17:53:41,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:53:41,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:53:41,641 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:53:41,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921114233] [2021-02-19 17:53:41,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710745541] [2021-02-19 17:53:41,641 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 [2021-02-19 17:53:41,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:53:41,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:53:41,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:53:41,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:53:42,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:42,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:42,052 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 17 treesize of output 13 [2021-02-19 17:53:42,055 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:42,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:42,062 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 18 treesize of output 14 [2021-02-19 17:53:42,065 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:42,234 WARN L202 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 33 [2021-02-19 17:53:42,235 INFO L628 ElimStorePlain]: treesize reduction 78, result has 39.5 percent of original size [2021-02-19 17:53:42,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:42,241 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 18 treesize of output 14 [2021-02-19 17:53:42,243 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:42,303 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:53:42,303 INFO L518 ElimStorePlain]: Eliminatee v_prenex_306 vanished before elimination [2021-02-19 17:53:42,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:42,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:53:42,314 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:53:42,367 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:53:42,370 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:53:42,370 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:141, output treesize:22 [2021-02-19 17:53:42,517 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:53:42,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:53:42,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-02-19 17:53:42,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186960393] [2021-02-19 17:53:42,518 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:53:42,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:53:42,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:53:42,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:53:42,518 INFO L87 Difference]: Start difference. First operand 140 states and 304 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) [2021-02-19 17:53:43,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:53:43,068 INFO L93 Difference]: Finished difference Result 171 states and 358 transitions. [2021-02-19 17:53:43,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:53:43,070 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 [2021-02-19 17:53:43,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:53:43,071 INFO L225 Difference]: With dead ends: 171 [2021-02-19 17:53:43,071 INFO L226 Difference]: Without dead ends: 171 [2021-02-19 17:53:43,071 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:53:43,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-02-19 17:53:43,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 142. [2021-02-19 17:53:43,072 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) [2021-02-19 17:53:43,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 309 transitions. [2021-02-19 17:53:43,072 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 309 transitions. Word has length 19 [2021-02-19 17:53:43,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:53:43,072 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 309 transitions. [2021-02-19 17:53:43,072 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) [2021-02-19 17:53:43,072 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 309 transitions. [2021-02-19 17:53:43,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:53:43,073 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:53:43,073 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:53:43,273 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2031,393 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:53:43,273 INFO L428 AbstractCegarLoop]: === Iteration 399 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:53:43,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:53:43,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1927594585, now seen corresponding path program 393 times [2021-02-19 17:53:43,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:53:43,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867769394] [2021-02-19 17:53:43,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:53:43,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:53:43,525 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:53:43,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867769394] [2021-02-19 17:53:43,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34722] [2021-02-19 17:53:43,525 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 [2021-02-19 17:53:43,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:53:43,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:53:43,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:53:43,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:53:44,107 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:53:44,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:53:44,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-02-19 17:53:44,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652255345] [2021-02-19 17:53:44,107 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:53:44,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:53:44,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:53:44,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:53:44,108 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) [2021-02-19 17:53:45,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:53:45,226 INFO L93 Difference]: Finished difference Result 210 states and 436 transitions. [2021-02-19 17:53:45,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:53:45,229 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 [2021-02-19 17:53:45,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:53:45,230 INFO L225 Difference]: With dead ends: 210 [2021-02-19 17:53:45,230 INFO L226 Difference]: Without dead ends: 210 [2021-02-19 17:53:45,230 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:53:45,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-02-19 17:53:45,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 143. [2021-02-19 17:53:45,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.211267605633803) internal successors, (314), 142 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) [2021-02-19 17:53:45,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 314 transitions. [2021-02-19 17:53:45,231 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 314 transitions. Word has length 19 [2021-02-19 17:53:45,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:53:45,232 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 314 transitions. [2021-02-19 17:53:45,232 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) [2021-02-19 17:53:45,232 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 314 transitions. [2021-02-19 17:53:45,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:53:45,232 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:53:45,232 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:53:45,432 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 394 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2035 [2021-02-19 17:53:45,432 INFO L428 AbstractCegarLoop]: === Iteration 400 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:53:45,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:53:45,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1292633440, now seen corresponding path program 394 times [2021-02-19 17:53:45,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:53:45,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184296958] [2021-02-19 17:53:45,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:53:45,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:53:45,613 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:53:45,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184296958] [2021-02-19 17:53:45,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831423722] [2021-02-19 17:53:45,613 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 [2021-02-19 17:53:45,632 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:53:45,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:53:45,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:53:45,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:53:46,115 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:53:46,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:53:46,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:53:46,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777610920] [2021-02-19 17:53:46,116 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:53:46,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:53:46,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:53:46,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:53:46,116 INFO L87 Difference]: Start difference. First operand 143 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) [2021-02-19 17:53:46,742 WARN L202 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-02-19 17:53:46,975 WARN L202 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 35 [2021-02-19 17:53:47,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:53:47,025 INFO L93 Difference]: Finished difference Result 147 states and 318 transitions. [2021-02-19 17:53:47,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:53:47,027 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 [2021-02-19 17:53:47,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:53:47,027 INFO L225 Difference]: With dead ends: 147 [2021-02-19 17:53:47,027 INFO L226 Difference]: Without dead ends: 143 [2021-02-19 17:53:47,028 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:53:47,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-02-19 17:53:47,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2021-02-19 17:53:47,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.204225352112676) internal successors, (313), 142 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) [2021-02-19 17:53:47,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 313 transitions. [2021-02-19 17:53:47,029 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 313 transitions. Word has length 19 [2021-02-19 17:53:47,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:53:47,029 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 313 transitions. [2021-02-19 17:53:47,029 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) [2021-02-19 17:53:47,029 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 313 transitions. [2021-02-19 17:53:47,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:53:47,029 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:53:47,029 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:53:47,230 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2047,395 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:53:47,230 INFO L428 AbstractCegarLoop]: === Iteration 401 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:53:47,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:53:47,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1392364783, now seen corresponding path program 395 times [2021-02-19 17:53:47,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:53:47,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127630689] [2021-02-19 17:53:47,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:53:47,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:53:47,477 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:53:47,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127630689] [2021-02-19 17:53:47,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048007346] [2021-02-19 17:53:47,477 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 [2021-02-19 17:53:47,496 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 17:53:47,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:53:47,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:53:47,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:53:47,965 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:53:47,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:53:47,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-02-19 17:53:47,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176604928] [2021-02-19 17:53:47,965 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:53:47,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:53:47,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:53:47,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:53:47,966 INFO L87 Difference]: Start difference. First operand 143 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) [2021-02-19 17:53:48,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:53:48,516 INFO L93 Difference]: Finished difference Result 167 states and 359 transitions. [2021-02-19 17:53:48,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:53:48,519 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 [2021-02-19 17:53:48,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:53:48,519 INFO L225 Difference]: With dead ends: 167 [2021-02-19 17:53:48,519 INFO L226 Difference]: Without dead ends: 167 [2021-02-19 17:53:48,519 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:53:48,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-02-19 17:53:48,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 137. [2021-02-19 17:53:48,520 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) [2021-02-19 17:53:48,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 298 transitions. [2021-02-19 17:53:48,521 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 298 transitions. Word has length 19 [2021-02-19 17:53:48,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:53:48,521 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 298 transitions. [2021-02-19 17:53:48,521 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) [2021-02-19 17:53:48,521 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 298 transitions. [2021-02-19 17:53:48,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:53:48,521 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:53:48,521 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:53:48,721 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2052,396 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:53:48,721 INFO L428 AbstractCegarLoop]: === Iteration 402 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:53:48,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:53:48,722 INFO L82 PathProgramCache]: Analyzing trace with hash -8889302, now seen corresponding path program 396 times [2021-02-19 17:53:48,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:53:48,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517891670] [2021-02-19 17:53:48,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:53:48,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:53:48,985 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:53:48,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517891670] [2021-02-19 17:53:48,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328224507] [2021-02-19 17:53:48,986 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 [2021-02-19 17:53:49,004 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:53:49,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:53:49,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:53:49,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:53:49,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:49,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:49,389 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 17 treesize of output 13 [2021-02-19 17:53:49,392 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:49,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:49,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:53:49,400 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:49,448 INFO L628 ElimStorePlain]: treesize reduction 38, result has 30.9 percent of original size [2021-02-19 17:53:49,449 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:53:49,450 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:53:49,450 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:67, output treesize:9 [2021-02-19 17:53:49,509 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:53:49,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:53:49,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-02-19 17:53:49,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421149355] [2021-02-19 17:53:49,509 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:53:49,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:53:49,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:53:49,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:53:49,510 INFO L87 Difference]: Start difference. First operand 137 states and 298 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) [2021-02-19 17:53:50,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:53:50,237 INFO L93 Difference]: Finished difference Result 167 states and 358 transitions. [2021-02-19 17:53:50,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:53:50,239 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 [2021-02-19 17:53:50,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:53:50,239 INFO L225 Difference]: With dead ends: 167 [2021-02-19 17:53:50,239 INFO L226 Difference]: Without dead ends: 167 [2021-02-19 17:53:50,239 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:53:50,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-02-19 17:53:50,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 139. [2021-02-19 17:53:50,240 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) [2021-02-19 17:53:50,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 302 transitions. [2021-02-19 17:53:50,241 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 302 transitions. Word has length 19 [2021-02-19 17:53:50,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:53:50,241 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 302 transitions. [2021-02-19 17:53:50,241 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) [2021-02-19 17:53:50,241 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 302 transitions. [2021-02-19 17:53:50,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:53:50,241 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:53:50,241 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:53:50,441 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2056 [2021-02-19 17:53:50,441 INFO L428 AbstractCegarLoop]: === Iteration 403 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:53:50,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:53:50,442 INFO L82 PathProgramCache]: Analyzing trace with hash -170079874, now seen corresponding path program 397 times [2021-02-19 17:53:50,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:53:50,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369089481] [2021-02-19 17:53:50,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:53:50,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:53:50,707 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:53:50,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369089481] [2021-02-19 17:53:50,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209559989] [2021-02-19 17:53:50,707 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 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 [2021-02-19 17:53:50,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:53:50,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:53:50,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:53:51,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:51,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:51,142 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 [2021-02-19 17:53:51,145 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:51,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:51,151 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 17 treesize of output 13 [2021-02-19 17:53:51,153 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:51,202 INFO L628 ElimStorePlain]: treesize reduction 38, result has 30.9 percent of original size [2021-02-19 17:53:51,203 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:53:51,205 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:53:51,205 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:67, output treesize:9 [2021-02-19 17:53:51,268 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:53:51,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:53:51,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-02-19 17:53:51,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924225049] [2021-02-19 17:53:51,269 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:53:51,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:53:51,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:53:51,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:53:51,269 INFO L87 Difference]: Start difference. First operand 139 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) [2021-02-19 17:53:52,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:53:52,739 INFO L93 Difference]: Finished difference Result 186 states and 396 transitions. [2021-02-19 17:53:52,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:53:52,741 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 [2021-02-19 17:53:52,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:53:52,742 INFO L225 Difference]: With dead ends: 186 [2021-02-19 17:53:52,742 INFO L226 Difference]: Without dead ends: 186 [2021-02-19 17:53:52,742 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:53:52,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-02-19 17:53:52,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 140. [2021-02-19 17:53:52,743 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) [2021-02-19 17:53:52,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 304 transitions. [2021-02-19 17:53:52,743 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 304 transitions. Word has length 19 [2021-02-19 17:53:52,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:53:52,743 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 304 transitions. [2021-02-19 17:53:52,744 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) [2021-02-19 17:53:52,744 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 304 transitions. [2021-02-19 17:53:52,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:53:52,744 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:53:52,744 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:53:52,944 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 398 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2057 [2021-02-19 17:53:52,944 INFO L428 AbstractCegarLoop]: === Iteration 404 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:53:52,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:53:52,944 INFO L82 PathProgramCache]: Analyzing trace with hash -519064586, now seen corresponding path program 398 times [2021-02-19 17:53:52,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:53:52,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537011888] [2021-02-19 17:53:52,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:53:52,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:53:53,217 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:53:53,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537011888] [2021-02-19 17:53:53,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189701322] [2021-02-19 17:53:53,218 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 [2021-02-19 17:53:53,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:53:53,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:53:53,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:53:53,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:53:53,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:53,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:53,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:53:53,597 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:53,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:53,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:53,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:53:53,609 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:53,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:53,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:53,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:53:53,620 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:53,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:53,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:53:53,630 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:53,791 WARN L202 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-02-19 17:53:53,792 INFO L628 ElimStorePlain]: treesize reduction 73, result has 38.7 percent of original size [2021-02-19 17:53:53,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:53,798 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 12 treesize of output 8 [2021-02-19 17:53:53,803 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:53:53,855 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:53:53,857 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:53:53,857 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:141, output treesize:22 [2021-02-19 17:53:54,018 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:53:54,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:53:54,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-02-19 17:53:54,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74559909] [2021-02-19 17:53:54,019 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:53:54,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:53:54,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:53:54,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:53:54,019 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) [2021-02-19 17:53:55,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:53:55,279 INFO L93 Difference]: Finished difference Result 199 states and 422 transitions. [2021-02-19 17:53:55,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:53:55,282 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 [2021-02-19 17:53:55,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:53:55,282 INFO L225 Difference]: With dead ends: 199 [2021-02-19 17:53:55,282 INFO L226 Difference]: Without dead ends: 199 [2021-02-19 17:53:55,282 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:53:55,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-02-19 17:53:55,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 141. [2021-02-19 17:53:55,284 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) [2021-02-19 17:53:55,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 306 transitions. [2021-02-19 17:53:55,284 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 306 transitions. Word has length 19 [2021-02-19 17:53:55,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:53:55,284 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 306 transitions. [2021-02-19 17:53:55,284 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) [2021-02-19 17:53:55,284 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 306 transitions. [2021-02-19 17:53:55,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:53:55,284 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:53:55,284 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:53:55,485 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 399 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2058 [2021-02-19 17:53:55,485 INFO L428 AbstractCegarLoop]: === Iteration 405 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:53:55,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:53:55,485 INFO L82 PathProgramCache]: Analyzing trace with hash -761164625, now seen corresponding path program 399 times [2021-02-19 17:53:55,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:53:55,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701535737] [2021-02-19 17:53:55,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:53:55,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:53:55,793 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:53:55,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701535737] [2021-02-19 17:53:55,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954948378] [2021-02-19 17:53:55,794 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 [2021-02-19 17:53:55,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:53:55,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:53:55,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:53:55,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:53:56,361 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:53:56,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:53:56,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-02-19 17:53:56,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366488180] [2021-02-19 17:53:56,362 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:53:56,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:53:56,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:53:56,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:53:56,362 INFO L87 Difference]: Start difference. First operand 141 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) [2021-02-19 17:53:57,301 WARN L202 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-02-19 17:53:57,626 WARN L202 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2021-02-19 17:53:57,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:53:57,860 INFO L93 Difference]: Finished difference Result 159 states and 343 transitions. [2021-02-19 17:53:57,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:53:57,862 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 [2021-02-19 17:53:57,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:53:57,863 INFO L225 Difference]: With dead ends: 159 [2021-02-19 17:53:57,863 INFO L226 Difference]: Without dead ends: 159 [2021-02-19 17:53:57,863 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:53:57,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-02-19 17:53:57,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 138. [2021-02-19 17:53:57,864 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) [2021-02-19 17:53:57,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 300 transitions. [2021-02-19 17:53:57,864 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 300 transitions. Word has length 19 [2021-02-19 17:53:57,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:53:57,864 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 300 transitions. [2021-02-19 17:53:57,865 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) [2021-02-19 17:53:57,865 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 300 transitions. [2021-02-19 17:53:57,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:53:57,865 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:53:57,865 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:53:58,065 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2061,400 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:53:58,065 INFO L428 AbstractCegarLoop]: === Iteration 406 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:53:58,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:53:58,065 INFO L82 PathProgramCache]: Analyzing trace with hash 870155924, now seen corresponding path program 400 times [2021-02-19 17:53:58,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:53:58,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98957249] [2021-02-19 17:53:58,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:53:58,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:53:58,302 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:53:58,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98957249] [2021-02-19 17:53:58,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30902889] [2021-02-19 17:53:58,302 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 [2021-02-19 17:53:58,320 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:53:58,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:53:58,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:53:58,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:53:58,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:58,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:58,738 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 16 treesize of output 12 [2021-02-19 17:53:58,741 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:58,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:58,747 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 15 treesize of output 11 [2021-02-19 17:53:58,751 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:58,795 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-02-19 17:53:58,795 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:53:58,797 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:53:58,797 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-02-19 17:53:58,811 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:53:58,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:53:58,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:53:58,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188983868] [2021-02-19 17:53:58,811 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:53:58,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:53:58,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:53:58,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:53:58,812 INFO L87 Difference]: Start difference. First operand 138 states and 300 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) [2021-02-19 17:53:59,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:53:59,445 INFO L93 Difference]: Finished difference Result 170 states and 364 transitions. [2021-02-19 17:53:59,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:53:59,447 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 [2021-02-19 17:53:59,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:53:59,447 INFO L225 Difference]: With dead ends: 170 [2021-02-19 17:53:59,447 INFO L226 Difference]: Without dead ends: 170 [2021-02-19 17:53:59,447 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:53:59,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-02-19 17:53:59,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 140. [2021-02-19 17:53:59,448 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) [2021-02-19 17:53:59,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 304 transitions. [2021-02-19 17:53:59,449 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 304 transitions. Word has length 19 [2021-02-19 17:53:59,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:53:59,449 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 304 transitions. [2021-02-19 17:53:59,449 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) [2021-02-19 17:53:59,449 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 304 transitions. [2021-02-19 17:53:59,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:53:59,449 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:53:59,449 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:53:59,649 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2071,401 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:53:59,649 INFO L428 AbstractCegarLoop]: === Iteration 407 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:53:59,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:53:59,650 INFO L82 PathProgramCache]: Analyzing trace with hash 521171212, now seen corresponding path program 401 times [2021-02-19 17:53:59,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:53:59,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328250944] [2021-02-19 17:53:59,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:53:59,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:53:59,899 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:53:59,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328250944] [2021-02-19 17:53:59,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015046521] [2021-02-19 17:53:59,900 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 [2021-02-19 17:53:59,919 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 17:53:59,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:53:59,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:53:59,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:54:00,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:00,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:00,306 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 15 treesize of output 11 [2021-02-19 17:54:00,310 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:00,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:00,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:00,318 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 16 treesize of output 12 [2021-02-19 17:54:00,320 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:00,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:00,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:00,329 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 [2021-02-19 17:54:00,332 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:00,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:00,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:54:00,343 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:00,465 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 15 [2021-02-19 17:54:00,466 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-02-19 17:54:00,467 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:54:00,469 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:54:00,469 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-02-19 17:54:00,609 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:54:00,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:54:00,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-02-19 17:54:00,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838566861] [2021-02-19 17:54:00,610 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:54:00,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:54:00,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:54:00,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:54:00,610 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) [2021-02-19 17:54:01,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:54:01,942 INFO L93 Difference]: Finished difference Result 189 states and 403 transitions. [2021-02-19 17:54:01,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:54:01,945 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 [2021-02-19 17:54:01,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:54:01,945 INFO L225 Difference]: With dead ends: 189 [2021-02-19 17:54:01,945 INFO L226 Difference]: Without dead ends: 189 [2021-02-19 17:54:01,945 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2021-02-19 17:54:01,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-02-19 17:54:01,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 141. [2021-02-19 17:54:01,947 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) [2021-02-19 17:54:01,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 306 transitions. [2021-02-19 17:54:01,947 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 306 transitions. Word has length 19 [2021-02-19 17:54:01,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:54:01,947 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 306 transitions. [2021-02-19 17:54:01,947 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) [2021-02-19 17:54:01,947 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 306 transitions. [2021-02-19 17:54:01,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:54:01,947 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:54:01,947 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:54:02,147 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2075,402 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:54:02,148 INFO L428 AbstractCegarLoop]: === Iteration 408 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:54:02,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:54:02,148 INFO L82 PathProgramCache]: Analyzing trace with hash 279071173, now seen corresponding path program 402 times [2021-02-19 17:54:02,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:54:02,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806622086] [2021-02-19 17:54:02,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:54:02,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:54:02,461 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:54:02,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806622086] [2021-02-19 17:54:02,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669005277] [2021-02-19 17:54:02,461 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 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 [2021-02-19 17:54:02,481 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:54:02,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:54:02,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:54:02,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:54:02,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:02,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:02,853 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 18 treesize of output 14 [2021-02-19 17:54:02,857 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:02,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:02,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:02,864 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 17 treesize of output 13 [2021-02-19 17:54:02,867 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:02,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:02,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:02,875 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 18 treesize of output 14 [2021-02-19 17:54:02,877 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:02,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:02,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:54:02,886 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:03,028 WARN L202 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 23 [2021-02-19 17:54:03,029 INFO L628 ElimStorePlain]: treesize reduction 65, result has 38.1 percent of original size [2021-02-19 17:54:03,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:03,032 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 9 treesize of output 5 [2021-02-19 17:54:03,035 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:54:03,060 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:54:03,061 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:54:03,062 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:133, output treesize:22 [2021-02-19 17:54:03,129 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:54:03,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:54:03,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-02-19 17:54:03,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514154724] [2021-02-19 17:54:03,129 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:54:03,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:54:03,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:54:03,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:54:03,130 INFO L87 Difference]: Start difference. First operand 141 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) [2021-02-19 17:54:03,459 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2021-02-19 17:54:03,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:54:03,796 INFO L93 Difference]: Finished difference Result 154 states and 333 transitions. [2021-02-19 17:54:03,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:54:03,799 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 [2021-02-19 17:54:03,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:54:03,799 INFO L225 Difference]: With dead ends: 154 [2021-02-19 17:54:03,799 INFO L226 Difference]: Without dead ends: 154 [2021-02-19 17:54:03,799 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:54:03,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-02-19 17:54:03,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 139. [2021-02-19 17:54:03,800 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) [2021-02-19 17:54:03,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 302 transitions. [2021-02-19 17:54:03,801 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 302 transitions. Word has length 19 [2021-02-19 17:54:03,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:54:03,801 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 302 transitions. [2021-02-19 17:54:03,801 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) [2021-02-19 17:54:03,801 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 302 transitions. [2021-02-19 17:54:03,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:54:03,801 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:54:03,801 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:54:04,001 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2085,403 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:54:04,001 INFO L428 AbstractCegarLoop]: === Iteration 409 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:54:04,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:54:04,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1108916534, now seen corresponding path program 403 times [2021-02-19 17:54:04,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:54:04,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284024646] [2021-02-19 17:54:04,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:54:04,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:54:04,280 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:54:04,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284024646] [2021-02-19 17:54:04,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655745869] [2021-02-19 17:54:04,280 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 [2021-02-19 17:54:04,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:54:04,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:54:04,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:54:04,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:04,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:04,713 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 17 treesize of output 13 [2021-02-19 17:54:04,717 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:04,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:04,723 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 16 treesize of output 12 [2021-02-19 17:54:04,726 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:04,864 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 25 [2021-02-19 17:54:04,865 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-02-19 17:54:04,869 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 [2021-02-19 17:54:04,874 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:04,925 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:54:04,925 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:54:04,925 INFO L518 ElimStorePlain]: Eliminatee v_prenex_309 vanished before elimination [2021-02-19 17:54:04,927 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:54:04,928 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-02-19 17:54:05,054 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:54:05,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:54:05,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-02-19 17:54:05,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545717549] [2021-02-19 17:54:05,055 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:54:05,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:54:05,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:54:05,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:54:05,055 INFO L87 Difference]: Start difference. First operand 139 states and 302 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) [2021-02-19 17:54:05,733 WARN L202 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-02-19 17:54:05,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:54:05,990 INFO L93 Difference]: Finished difference Result 171 states and 360 transitions. [2021-02-19 17:54:05,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:54:05,991 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 [2021-02-19 17:54:05,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:54:05,992 INFO L225 Difference]: With dead ends: 171 [2021-02-19 17:54:05,992 INFO L226 Difference]: Without dead ends: 171 [2021-02-19 17:54:05,992 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:54:05,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-02-19 17:54:05,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 141. [2021-02-19 17:54:05,993 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) [2021-02-19 17:54:05,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 307 transitions. [2021-02-19 17:54:05,993 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 307 transitions. Word has length 19 [2021-02-19 17:54:05,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:54:05,993 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 307 transitions. [2021-02-19 17:54:05,994 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) [2021-02-19 17:54:05,994 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 307 transitions. [2021-02-19 17:54:05,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:54:05,994 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:54:05,994 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:54:06,194 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 404 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2089 [2021-02-19 17:54:06,194 INFO L428 AbstractCegarLoop]: === Iteration 410 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:54:06,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:54:06,194 INFO L82 PathProgramCache]: Analyzing trace with hash 866816495, now seen corresponding path program 404 times [2021-02-19 17:54:06,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:54:06,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928944230] [2021-02-19 17:54:06,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:54:06,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:54:06,424 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:54:06,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928944230] [2021-02-19 17:54:06,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016922135] [2021-02-19 17:54:06,424 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 [2021-02-19 17:54:06,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:54:06,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:54:06,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:54:06,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:54:06,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:06,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:06,805 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 17 treesize of output 13 [2021-02-19 17:54:06,808 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:06,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:06,815 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 [2021-02-19 17:54:06,818 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:06,993 WARN L202 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2021-02-19 17:54:06,994 INFO L628 ElimStorePlain]: treesize reduction 66, result has 44.5 percent of original size [2021-02-19 17:54:06,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:07,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:54:07,007 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:54:07,082 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:54:07,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:07,089 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 18 treesize of output 14 [2021-02-19 17:54:07,091 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:07,151 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:54:07,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:07,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:54:07,162 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:54:07,212 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:54:07,217 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:54:07,217 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-02-19 17:54:07,356 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:54:07,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:54:07,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-02-19 17:54:07,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269836435] [2021-02-19 17:54:07,357 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:54:07,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:54:07,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:54:07,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:54:07,357 INFO L87 Difference]: Start difference. First operand 141 states and 307 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) [2021-02-19 17:54:08,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:54:08,362 INFO L93 Difference]: Finished difference Result 212 states and 440 transitions. [2021-02-19 17:54:08,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:54:08,364 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 [2021-02-19 17:54:08,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:54:08,365 INFO L225 Difference]: With dead ends: 212 [2021-02-19 17:54:08,365 INFO L226 Difference]: Without dead ends: 212 [2021-02-19 17:54:08,365 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:54:08,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-02-19 17:54:08,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 142. [2021-02-19 17:54:08,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.2127659574468086) internal successors, (312), 141 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:54:08,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 312 transitions. [2021-02-19 17:54:08,366 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 312 transitions. Word has length 19 [2021-02-19 17:54:08,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:54:08,366 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 312 transitions. [2021-02-19 17:54:08,367 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) [2021-02-19 17:54:08,367 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 312 transitions. [2021-02-19 17:54:08,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:54:08,367 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:54:08,367 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:54:08,567 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2096,405 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:54:08,567 INFO L428 AbstractCegarLoop]: === Iteration 411 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:54:08,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:54:08,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1941555766, now seen corresponding path program 405 times [2021-02-19 17:54:08,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:54:08,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983165277] [2021-02-19 17:54:08,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:54:08,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:54:08,723 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:54:08,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983165277] [2021-02-19 17:54:08,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613404712] [2021-02-19 17:54:08,724 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 [2021-02-19 17:54:08,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:54:08,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:54:08,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:54:08,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:54:09,203 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:54:09,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:54:09,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:54:09,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627526865] [2021-02-19 17:54:09,204 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:54:09,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:54:09,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:54:09,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:54:09,204 INFO L87 Difference]: Start difference. First operand 142 states and 312 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) [2021-02-19 17:54:09,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:54:09,868 INFO L93 Difference]: Finished difference Result 146 states and 316 transitions. [2021-02-19 17:54:09,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:54:09,870 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 [2021-02-19 17:54:09,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:54:09,870 INFO L225 Difference]: With dead ends: 146 [2021-02-19 17:54:09,870 INFO L226 Difference]: Without dead ends: 142 [2021-02-19 17:54:09,870 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:54:09,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-02-19 17:54:09,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2021-02-19 17:54:09,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.2056737588652484) internal successors, (311), 141 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) [2021-02-19 17:54:09,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 311 transitions. [2021-02-19 17:54:09,872 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 311 transitions. Word has length 19 [2021-02-19 17:54:09,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:54:09,872 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 311 transitions. [2021-02-19 17:54:09,872 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) [2021-02-19 17:54:09,872 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 311 transitions. [2021-02-19 17:54:09,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:54:09,872 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:54:09,872 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:54:10,072 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 406 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2100 [2021-02-19 17:54:10,073 INFO L428 AbstractCegarLoop]: === Iteration 412 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:54:10,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:54:10,073 INFO L82 PathProgramCache]: Analyzing trace with hash 331586693, now seen corresponding path program 406 times [2021-02-19 17:54:10,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:54:10,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728055320] [2021-02-19 17:54:10,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:54:10,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:54:10,329 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:54:10,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728055320] [2021-02-19 17:54:10,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879433003] [2021-02-19 17:54:10,330 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 [2021-02-19 17:54:10,348 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:54:10,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:54:10,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:54:10,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:54:10,806 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:54:10,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:54:10,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:54:10,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170282901] [2021-02-19 17:54:10,807 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:54:10,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:54:10,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:54:10,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:54:10,807 INFO L87 Difference]: Start difference. First operand 142 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) [2021-02-19 17:54:11,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:54:11,404 INFO L93 Difference]: Finished difference Result 166 states and 357 transitions. [2021-02-19 17:54:11,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:54:11,405 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 [2021-02-19 17:54:11,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:54:11,406 INFO L225 Difference]: With dead ends: 166 [2021-02-19 17:54:11,406 INFO L226 Difference]: Without dead ends: 166 [2021-02-19 17:54:11,406 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:54:11,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-02-19 17:54:11,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 137. [2021-02-19 17:54:11,407 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) [2021-02-19 17:54:11,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 298 transitions. [2021-02-19 17:54:11,407 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 298 transitions. Word has length 19 [2021-02-19 17:54:11,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:54:11,407 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 298 transitions. [2021-02-19 17:54:11,408 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) [2021-02-19 17:54:11,408 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 298 transitions. [2021-02-19 17:54:11,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:54:11,408 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:54:11,408 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:54:11,608 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 407 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2104 [2021-02-19 17:54:11,608 INFO L428 AbstractCegarLoop]: === Iteration 413 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:54:11,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:54:11,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1242272706, now seen corresponding path program 407 times [2021-02-19 17:54:11,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:54:11,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333386023] [2021-02-19 17:54:11,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:54:11,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:54:11,893 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:54:11,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333386023] [2021-02-19 17:54:11,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725921847] [2021-02-19 17:54:11,893 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 [2021-02-19 17:54:11,912 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:54:11,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:54:11,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:54:11,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:54:12,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:12,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:12,317 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 17 treesize of output 13 [2021-02-19 17:54:12,319 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:12,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:12,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:54:12,329 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:12,392 INFO L628 ElimStorePlain]: treesize reduction 38, result has 30.9 percent of original size [2021-02-19 17:54:12,392 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:54:12,394 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:54:12,394 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:67, output treesize:9 [2021-02-19 17:54:12,461 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:54:12,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:54:12,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-02-19 17:54:12,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687071758] [2021-02-19 17:54:12,461 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:54:12,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:54:12,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:54:12,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:54:12,462 INFO L87 Difference]: Start difference. First operand 137 states and 298 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) [2021-02-19 17:54:13,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:54:13,141 INFO L93 Difference]: Finished difference Result 178 states and 380 transitions. [2021-02-19 17:54:13,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:54:13,143 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 [2021-02-19 17:54:13,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:54:13,144 INFO L225 Difference]: With dead ends: 178 [2021-02-19 17:54:13,144 INFO L226 Difference]: Without dead ends: 178 [2021-02-19 17:54:13,144 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:54:13,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-02-19 17:54:13,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 137. [2021-02-19 17:54:13,145 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) [2021-02-19 17:54:13,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 298 transitions. [2021-02-19 17:54:13,145 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 298 transitions. Word has length 19 [2021-02-19 17:54:13,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:54:13,145 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 298 transitions. [2021-02-19 17:54:13,145 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) [2021-02-19 17:54:13,145 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 298 transitions. [2021-02-19 17:54:13,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:54:13,146 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:54:13,146 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:54:13,346 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2108,408 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:54:13,346 INFO L428 AbstractCegarLoop]: === Iteration 414 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:54:13,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:54:13,346 INFO L82 PathProgramCache]: Analyzing trace with hash -1591257418, now seen corresponding path program 408 times [2021-02-19 17:54:13,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:54:13,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732610421] [2021-02-19 17:54:13,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:54:13,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:54:13,515 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:54:13,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732610421] [2021-02-19 17:54:13,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732339774] [2021-02-19 17:54:13,516 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 [2021-02-19 17:54:13,535 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 17:54:13,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:54:13,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:54:13,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:54:13,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:13,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:13,874 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 17 treesize of output 13 [2021-02-19 17:54:13,878 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:13,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:13,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:13,886 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 18 treesize of output 14 [2021-02-19 17:54:13,890 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:13,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:13,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:13,898 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 18 treesize of output 14 [2021-02-19 17:54:13,901 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:13,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:13,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:54:13,911 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:14,071 WARN L202 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-02-19 17:54:14,072 INFO L628 ElimStorePlain]: treesize reduction 75, result has 38.0 percent of original size [2021-02-19 17:54:14,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:14,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:54:14,083 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:54:14,140 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:54:14,142 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:54:14,142 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:141, output treesize:22 [2021-02-19 17:54:14,298 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:54:14,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:54:14,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-02-19 17:54:14,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222038393] [2021-02-19 17:54:14,299 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:54:14,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:54:14,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:54:14,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:54:14,299 INFO L87 Difference]: Start difference. First operand 137 states and 298 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) [2021-02-19 17:54:15,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:54:15,408 INFO L93 Difference]: Finished difference Result 198 states and 419 transitions. [2021-02-19 17:54:15,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:54:15,411 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 [2021-02-19 17:54:15,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:54:15,411 INFO L225 Difference]: With dead ends: 198 [2021-02-19 17:54:15,411 INFO L226 Difference]: Without dead ends: 198 [2021-02-19 17:54:15,411 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:54:15,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-02-19 17:54:15,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 136. [2021-02-19 17:54:15,413 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) [2021-02-19 17:54:15,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 295 transitions. [2021-02-19 17:54:15,413 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 295 transitions. Word has length 19 [2021-02-19 17:54:15,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:54:15,413 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 295 transitions. [2021-02-19 17:54:15,413 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) [2021-02-19 17:54:15,413 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 295 transitions. [2021-02-19 17:54:15,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:54:15,413 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:54:15,413 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:54:15,613 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2109,409 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:54:15,614 INFO L428 AbstractCegarLoop]: === Iteration 415 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:54:15,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:54:15,614 INFO L82 PathProgramCache]: Analyzing trace with hash 2070127065, now seen corresponding path program 409 times [2021-02-19 17:54:15,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:54:15,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694944674] [2021-02-19 17:54:15,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:54:15,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:54:15,938 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:54:15,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694944674] [2021-02-19 17:54:15,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739063725] [2021-02-19 17:54:15,939 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 [2021-02-19 17:54:15,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:54:15,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:54:15,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:54:16,463 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:54:16,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:54:16,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:54:16,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71247965] [2021-02-19 17:54:16,463 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:54:16,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:54:16,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:54:16,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:54:16,464 INFO L87 Difference]: Start difference. First operand 136 states and 295 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) [2021-02-19 17:54:16,699 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-02-19 17:54:17,051 WARN L202 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2021-02-19 17:54:17,459 WARN L202 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-02-19 17:54:17,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:54:17,689 INFO L93 Difference]: Finished difference Result 169 states and 353 transitions. [2021-02-19 17:54:17,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:54:17,692 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 [2021-02-19 17:54:17,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:54:17,693 INFO L225 Difference]: With dead ends: 169 [2021-02-19 17:54:17,693 INFO L226 Difference]: Without dead ends: 166 [2021-02-19 17:54:17,693 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:54:17,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-02-19 17:54:17,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 141. [2021-02-19 17:54:17,694 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) [2021-02-19 17:54:17,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 306 transitions. [2021-02-19 17:54:17,694 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 306 transitions. Word has length 19 [2021-02-19 17:54:17,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:54:17,694 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 306 transitions. [2021-02-19 17:54:17,694 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) [2021-02-19 17:54:17,694 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 306 transitions. [2021-02-19 17:54:17,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:54:17,695 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:54:17,695 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:54:17,895 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 410 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2112 [2021-02-19 17:54:17,895 INFO L428 AbstractCegarLoop]: === Iteration 416 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:54:17,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:54:17,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1833357457, now seen corresponding path program 410 times [2021-02-19 17:54:17,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:54:17,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346569840] [2021-02-19 17:54:17,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:54:17,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:54:18,223 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:54:18,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346569840] [2021-02-19 17:54:18,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194832711] [2021-02-19 17:54:18,223 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 [2021-02-19 17:54:18,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:54:18,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:54:18,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:54:18,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:54:18,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:18,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:18,625 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 17 treesize of output 13 [2021-02-19 17:54:18,629 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:18,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:18,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:18,637 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 18 treesize of output 14 [2021-02-19 17:54:18,639 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:18,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:18,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:18,647 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 18 treesize of output 14 [2021-02-19 17:54:18,650 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:18,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:18,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:54:18,660 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:18,817 WARN L202 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 23 [2021-02-19 17:54:18,818 INFO L628 ElimStorePlain]: treesize reduction 65, result has 38.1 percent of original size [2021-02-19 17:54:18,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:18,824 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 9 treesize of output 5 [2021-02-19 17:54:18,830 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:54:18,881 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:54:18,885 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:54:18,885 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:133, output treesize:22 [2021-02-19 17:54:18,988 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:54:18,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:54:18,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-02-19 17:54:18,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131629563] [2021-02-19 17:54:18,988 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:54:18,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:54:18,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:54:18,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:54:18,989 INFO L87 Difference]: Start difference. First operand 141 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) [2021-02-19 17:54:19,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:54:19,706 INFO L93 Difference]: Finished difference Result 154 states and 332 transitions. [2021-02-19 17:54:19,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:54:19,708 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 [2021-02-19 17:54:19,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:54:19,709 INFO L225 Difference]: With dead ends: 154 [2021-02-19 17:54:19,709 INFO L226 Difference]: Without dead ends: 154 [2021-02-19 17:54:19,709 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:54:19,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-02-19 17:54:19,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 135. [2021-02-19 17:54:19,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.1865671641791047) internal successors, (293), 134 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) [2021-02-19 17:54:19,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 293 transitions. [2021-02-19 17:54:19,710 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 293 transitions. Word has length 19 [2021-02-19 17:54:19,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:54:19,710 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 293 transitions. [2021-02-19 17:54:19,710 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) [2021-02-19 17:54:19,710 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 293 transitions. [2021-02-19 17:54:19,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:54:19,710 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:54:19,711 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:54:19,911 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 411 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2122 [2021-02-19 17:54:19,911 INFO L428 AbstractCegarLoop]: === Iteration 417 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:54:19,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:54:19,911 INFO L82 PathProgramCache]: Analyzing trace with hash -1003512096, now seen corresponding path program 411 times [2021-02-19 17:54:19,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:54:19,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631941293] [2021-02-19 17:54:19,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:54:19,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:54:20,237 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:54:20,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631941293] [2021-02-19 17:54:20,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818118867] [2021-02-19 17:54:20,237 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 [2021-02-19 17:54:20,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:54:20,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:54:20,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:54:20,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:54:20,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:20,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:20,660 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 17 treesize of output 13 [2021-02-19 17:54:20,663 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:20,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:20,670 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 18 treesize of output 14 [2021-02-19 17:54:20,674 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:20,869 WARN L202 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 30 [2021-02-19 17:54:20,870 INFO L628 ElimStorePlain]: treesize reduction 84, result has 35.9 percent of original size [2021-02-19 17:54:20,870 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:54:20,875 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 [2021-02-19 17:54:20,879 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:20,944 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:54:20,944 INFO L518 ElimStorePlain]: Eliminatee v_prenex_315 vanished before elimination [2021-02-19 17:54:20,946 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:54:20,946 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:141, output treesize:22 [2021-02-19 17:54:21,113 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:54:21,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:54:21,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-02-19 17:54:21,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217049282] [2021-02-19 17:54:21,114 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:54:21,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:54:21,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:54:21,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:54:21,114 INFO L87 Difference]: Start difference. First operand 135 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) [2021-02-19 17:54:21,715 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-02-19 17:54:22,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:54:22,255 INFO L93 Difference]: Finished difference Result 174 states and 364 transitions. [2021-02-19 17:54:22,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:54:22,257 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 [2021-02-19 17:54:22,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:54:22,258 INFO L225 Difference]: With dead ends: 174 [2021-02-19 17:54:22,258 INFO L226 Difference]: Without dead ends: 174 [2021-02-19 17:54:22,258 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:54:22,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-02-19 17:54:22,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 137. [2021-02-19 17:54:22,259 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) [2021-02-19 17:54:22,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 298 transitions. [2021-02-19 17:54:22,260 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 298 transitions. Word has length 19 [2021-02-19 17:54:22,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:54:22,260 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 298 transitions. [2021-02-19 17:54:22,260 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) [2021-02-19 17:54:22,260 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 298 transitions. [2021-02-19 17:54:22,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:54:22,260 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:54:22,260 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:54:22,460 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 412 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2126 [2021-02-19 17:54:22,460 INFO L428 AbstractCegarLoop]: === Iteration 418 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:54:22,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:54:22,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1245612135, now seen corresponding path program 412 times [2021-02-19 17:54:22,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:54:22,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473916632] [2021-02-19 17:54:22,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:54:22,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:54:22,767 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:54:22,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473916632] [2021-02-19 17:54:22,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588318802] [2021-02-19 17:54:22,767 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 [2021-02-19 17:54:22,785 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:54:22,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:54:22,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:54:22,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:54:23,409 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:54:23,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:54:23,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-02-19 17:54:23,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918646046] [2021-02-19 17:54:23,409 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:54:23,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:54:23,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:54:23,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:54:23,409 INFO L87 Difference]: Start difference. First operand 137 states and 298 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) [2021-02-19 17:54:24,439 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-02-19 17:54:24,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:54:24,848 INFO L93 Difference]: Finished difference Result 212 states and 439 transitions. [2021-02-19 17:54:24,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:54:24,851 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 [2021-02-19 17:54:24,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:54:24,851 INFO L225 Difference]: With dead ends: 212 [2021-02-19 17:54:24,851 INFO L226 Difference]: Without dead ends: 212 [2021-02-19 17:54:24,851 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2021-02-19 17:54:24,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-02-19 17:54:24,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 138. [2021-02-19 17:54:24,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.2116788321167884) internal successors, (303), 137 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) [2021-02-19 17:54:24,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 303 transitions. [2021-02-19 17:54:24,853 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 303 transitions. Word has length 19 [2021-02-19 17:54:24,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:54:24,853 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 303 transitions. [2021-02-19 17:54:24,853 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) [2021-02-19 17:54:24,853 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 303 transitions. [2021-02-19 17:54:24,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:54:24,853 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:54:24,853 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:54:25,053 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2130,413 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:54:25,054 INFO L428 AbstractCegarLoop]: === Iteration 419 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:54:25,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:54:25,054 INFO L82 PathProgramCache]: Analyzing trace with hash -170872864, now seen corresponding path program 413 times [2021-02-19 17:54:25,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:54:25,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949710928] [2021-02-19 17:54:25,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:54:25,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:54:25,368 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:54:25,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949710928] [2021-02-19 17:54:25,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594297947] [2021-02-19 17:54:25,368 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 [2021-02-19 17:54:25,387 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 17:54:25,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:54:25,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:54:25,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:54:25,882 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:54:25,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:54:25,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:54:25,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072321973] [2021-02-19 17:54:25,883 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:54:25,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:54:25,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:54:25,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:54:25,883 INFO L87 Difference]: Start difference. First operand 138 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) [2021-02-19 17:54:26,159 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-02-19 17:54:26,418 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-02-19 17:54:26,792 WARN L202 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-02-19 17:54:27,032 WARN L202 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 35 [2021-02-19 17:54:27,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:54:27,084 INFO L93 Difference]: Finished difference Result 143 states and 309 transitions. [2021-02-19 17:54:27,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:54:27,087 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 [2021-02-19 17:54:27,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:54:27,087 INFO L225 Difference]: With dead ends: 143 [2021-02-19 17:54:27,087 INFO L226 Difference]: Without dead ends: 139 [2021-02-19 17:54:27,087 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:54:27,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-02-19 17:54:27,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 138. [2021-02-19 17:54:27,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.204379562043796) internal successors, (302), 137 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) [2021-02-19 17:54:27,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 302 transitions. [2021-02-19 17:54:27,089 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 302 transitions. Word has length 19 [2021-02-19 17:54:27,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:54:27,089 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 302 transitions. [2021-02-19 17:54:27,089 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) [2021-02-19 17:54:27,089 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 302 transitions. [2021-02-19 17:54:27,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:54:27,089 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:54:27,089 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:54:27,289 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2142,414 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:54:27,290 INFO L428 AbstractCegarLoop]: === Iteration 420 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:54:27,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:54:27,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1780841937, now seen corresponding path program 414 times [2021-02-19 17:54:27,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:54:27,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482127943] [2021-02-19 17:54:27,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:54:27,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:54:27,544 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:54:27,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482127943] [2021-02-19 17:54:27,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911657829] [2021-02-19 17:54:27,544 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 [2021-02-19 17:54:27,563 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:54:27,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:54:27,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:54:27,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:54:28,054 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:54:28,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:54:28,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-02-19 17:54:28,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228450117] [2021-02-19 17:54:28,054 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:54:28,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:54:28,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:54:28,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:54:28,055 INFO L87 Difference]: Start difference. First operand 138 states and 302 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) [2021-02-19 17:54:28,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:54:28,973 INFO L93 Difference]: Finished difference Result 165 states and 356 transitions. [2021-02-19 17:54:28,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:54:28,976 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 [2021-02-19 17:54:28,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:54:28,976 INFO L225 Difference]: With dead ends: 165 [2021-02-19 17:54:28,976 INFO L226 Difference]: Without dead ends: 165 [2021-02-19 17:54:28,977 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:54:28,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-02-19 17:54:28,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 134. [2021-02-19 17:54:28,978 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) [2021-02-19 17:54:28,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 291 transitions. [2021-02-19 17:54:28,978 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 291 transitions. Word has length 19 [2021-02-19 17:54:28,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:54:28,978 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 291 transitions. [2021-02-19 17:54:28,978 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) [2021-02-19 17:54:28,978 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 291 transitions. [2021-02-19 17:54:28,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:54:28,978 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:54:28,978 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:54:29,179 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 415 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2147 [2021-02-19 17:54:29,179 INFO L428 AbstractCegarLoop]: === Iteration 421 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:54:29,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:54:29,179 INFO L82 PathProgramCache]: Analyzing trace with hash 241961386, now seen corresponding path program 415 times [2021-02-19 17:54:29,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:54:29,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101188539] [2021-02-19 17:54:29,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:54:29,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:54:29,502 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:54:29,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101188539] [2021-02-19 17:54:29,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062791009] [2021-02-19 17:54:29,502 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 [2021-02-19 17:54:29,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:54:29,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:54:29,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:54:30,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:30,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:30,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:54:30,044 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:30,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:30,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:54:30,054 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:30,201 WARN L202 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 26 [2021-02-19 17:54:30,202 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-02-19 17:54:30,206 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 [2021-02-19 17:54:30,210 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:30,264 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:54:30,264 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:54:30,264 INFO L518 ElimStorePlain]: Eliminatee v_prenex_319 vanished before elimination [2021-02-19 17:54:30,266 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:54:30,267 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-02-19 17:54:30,384 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:54:30,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:54:30,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:54:30,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830817338] [2021-02-19 17:54:30,384 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:54:30,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:54:30,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:54:30,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:54:30,385 INFO L87 Difference]: Start difference. First operand 134 states and 291 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) [2021-02-19 17:54:31,416 WARN L202 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2021-02-19 17:54:31,746 WARN L202 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2021-02-19 17:54:31,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:54:31,996 INFO L93 Difference]: Finished difference Result 172 states and 359 transitions. [2021-02-19 17:54:31,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:54:31,998 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 [2021-02-19 17:54:31,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:54:31,998 INFO L225 Difference]: With dead ends: 172 [2021-02-19 17:54:31,998 INFO L226 Difference]: Without dead ends: 172 [2021-02-19 17:54:31,998 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:54:31,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-02-19 17:54:31,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 137. [2021-02-19 17:54:32,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.198529411764706) internal successors, (299), 136 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) [2021-02-19 17:54:32,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 299 transitions. [2021-02-19 17:54:32,000 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 299 transitions. Word has length 19 [2021-02-19 17:54:32,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:54:32,000 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 299 transitions. [2021-02-19 17:54:32,000 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) [2021-02-19 17:54:32,000 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 299 transitions. [2021-02-19 17:54:32,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:54:32,000 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:54:32,000 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:54:32,200 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2151,416 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:54:32,201 INFO L428 AbstractCegarLoop]: === Iteration 422 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:54:32,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:54:32,201 INFO L82 PathProgramCache]: Analyzing trace with hash -205376337, now seen corresponding path program 416 times [2021-02-19 17:54:32,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:54:32,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355780741] [2021-02-19 17:54:32,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:54:32,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:54:32,491 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:54:32,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355780741] [2021-02-19 17:54:32,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351400202] [2021-02-19 17:54:32,492 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 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 [2021-02-19 17:54:32,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:54:32,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:54:32,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:54:32,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:54:33,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:33,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:33,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:54:33,022 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:33,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:33,029 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 17 treesize of output 13 [2021-02-19 17:54:33,032 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:33,220 WARN L202 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2021-02-19 17:54:33,222 INFO L628 ElimStorePlain]: treesize reduction 70, result has 41.2 percent of original size [2021-02-19 17:54:33,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:33,228 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 9 treesize of output 5 [2021-02-19 17:54:33,234 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:54:33,306 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:54:33,311 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 [2021-02-19 17:54:33,314 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:33,376 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:54:33,376 INFO L518 ElimStorePlain]: Eliminatee v_prenex_322 vanished before elimination [2021-02-19 17:54:33,381 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:54:33,381 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-02-19 17:54:33,555 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:54:33,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:54:33,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-02-19 17:54:33,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895593] [2021-02-19 17:54:33,556 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:54:33,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:54:33,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:54:33,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:54:33,556 INFO L87 Difference]: Start difference. First operand 137 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) [2021-02-19 17:54:34,547 WARN L202 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2021-02-19 17:54:34,961 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2021-02-19 17:54:35,140 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-02-19 17:54:35,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:54:35,224 INFO L93 Difference]: Finished difference Result 223 states and 459 transitions. [2021-02-19 17:54:35,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:54:35,226 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 [2021-02-19 17:54:35,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:54:35,227 INFO L225 Difference]: With dead ends: 223 [2021-02-19 17:54:35,227 INFO L226 Difference]: Without dead ends: 223 [2021-02-19 17:54:35,227 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:54:35,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-02-19 17:54:35,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 139. [2021-02-19 17:54:35,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.2246376811594204) internal successors, (307), 138 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) [2021-02-19 17:54:35,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 307 transitions. [2021-02-19 17:54:35,228 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 307 transitions. Word has length 19 [2021-02-19 17:54:35,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:54:35,229 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 307 transitions. [2021-02-19 17:54:35,229 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) [2021-02-19 17:54:35,229 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 307 transitions. [2021-02-19 17:54:35,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:54:35,229 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:54:35,229 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:54:35,429 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 417 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2158 [2021-02-19 17:54:35,429 INFO L428 AbstractCegarLoop]: === Iteration 423 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:54:35,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:54:35,429 INFO L82 PathProgramCache]: Analyzing trace with hash 869362934, now seen corresponding path program 417 times [2021-02-19 17:54:35,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:54:35,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229184009] [2021-02-19 17:54:35,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:54:35,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:54:35,800 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:54:35,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229184009] [2021-02-19 17:54:35,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80015397] [2021-02-19 17:54:35,800 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 [2021-02-19 17:54:35,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:54:35,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:54:35,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:54:35,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:54:36,436 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:54:36,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:54:36,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:54:36,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911010896] [2021-02-19 17:54:36,437 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:54:36,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:54:36,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:54:36,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:54:36,437 INFO L87 Difference]: Start difference. First operand 139 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) [2021-02-19 17:54:36,744 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-02-19 17:54:37,042 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2021-02-19 17:54:37,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:54:37,563 INFO L93 Difference]: Finished difference Result 148 states and 319 transitions. [2021-02-19 17:54:37,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:54:37,566 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 [2021-02-19 17:54:37,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:54:37,566 INFO L225 Difference]: With dead ends: 148 [2021-02-19 17:54:37,566 INFO L226 Difference]: Without dead ends: 144 [2021-02-19 17:54:37,566 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:54:37,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-02-19 17:54:37,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 139. [2021-02-19 17:54:37,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.217391304347826) internal successors, (306), 138 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) [2021-02-19 17:54:37,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 306 transitions. [2021-02-19 17:54:37,568 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 306 transitions. Word has length 19 [2021-02-19 17:54:37,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:54:37,568 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 306 transitions. [2021-02-19 17:54:37,568 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) [2021-02-19 17:54:37,568 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 306 transitions. [2021-02-19 17:54:37,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:54:37,568 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:54:37,568 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:54:37,768 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2162,418 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:54:37,769 INFO L428 AbstractCegarLoop]: === Iteration 424 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:54:37,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:54:37,769 INFO L82 PathProgramCache]: Analyzing trace with hash -740606139, now seen corresponding path program 418 times [2021-02-19 17:54:37,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:54:37,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458045929] [2021-02-19 17:54:37,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:54:37,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:54:38,054 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:54:38,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458045929] [2021-02-19 17:54:38,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148975064] [2021-02-19 17:54:38,054 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 [2021-02-19 17:54:38,073 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:54:38,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:54:38,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:54:38,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:54:38,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:38,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:38,608 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 [2021-02-19 17:54:38,611 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:38,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:38,618 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 17 treesize of output 13 [2021-02-19 17:54:38,621 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:38,696 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-02-19 17:54:38,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:38,702 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 9 treesize of output 5 [2021-02-19 17:54:38,709 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:54:38,727 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:54:38,730 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:54:38,730 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-02-19 17:54:38,812 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:54:38,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:54:38,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-02-19 17:54:38,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944105256] [2021-02-19 17:54:38,812 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:54:38,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:54:38,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:54:38,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:54:38,813 INFO L87 Difference]: Start difference. First operand 139 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) [2021-02-19 17:54:39,724 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2021-02-19 17:54:40,031 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2021-02-19 17:54:40,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:54:40,310 INFO L93 Difference]: Finished difference Result 179 states and 380 transitions. [2021-02-19 17:54:40,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:54:40,313 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 [2021-02-19 17:54:40,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:54:40,314 INFO L225 Difference]: With dead ends: 179 [2021-02-19 17:54:40,314 INFO L226 Difference]: Without dead ends: 179 [2021-02-19 17:54:40,314 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-02-19 17:54:40,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-02-19 17:54:40,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 138. [2021-02-19 17:54:40,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.218978102189781) internal successors, (304), 137 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) [2021-02-19 17:54:40,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 304 transitions. [2021-02-19 17:54:40,316 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 304 transitions. Word has length 19 [2021-02-19 17:54:40,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:54:40,316 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 304 transitions. [2021-02-19 17:54:40,316 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) [2021-02-19 17:54:40,316 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 304 transitions. [2021-02-19 17:54:40,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:54:40,316 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:54:40,316 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:54:40,516 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 419 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2166 [2021-02-19 17:54:40,516 INFO L428 AbstractCegarLoop]: === Iteration 425 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:54:40,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:54:40,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1237421186, now seen corresponding path program 419 times [2021-02-19 17:54:40,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:54:40,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496478517] [2021-02-19 17:54:40,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:54:40,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:54:40,809 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:54:40,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496478517] [2021-02-19 17:54:40,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008143765] [2021-02-19 17:54:40,810 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 [2021-02-19 17:54:40,829 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 17:54:40,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:54:40,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:54:40,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:54:41,386 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:54:41,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:54:41,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:54:41,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354483427] [2021-02-19 17:54:41,387 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:54:41,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:54:41,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:54:41,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:54:41,387 INFO L87 Difference]: Start difference. First operand 138 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) [2021-02-19 17:54:42,106 WARN L202 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2021-02-19 17:54:42,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:54:42,188 INFO L93 Difference]: Finished difference Result 144 states and 311 transitions. [2021-02-19 17:54:42,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:54:42,189 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 [2021-02-19 17:54:42,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:54:42,189 INFO L225 Difference]: With dead ends: 144 [2021-02-19 17:54:42,189 INFO L226 Difference]: Without dead ends: 138 [2021-02-19 17:54:42,189 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:54:42,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-02-19 17:54:42,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2021-02-19 17:54:42,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.2116788321167884) internal successors, (303), 137 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) [2021-02-19 17:54:42,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 303 transitions. [2021-02-19 17:54:42,191 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 303 transitions. Word has length 19 [2021-02-19 17:54:42,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:54:42,191 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 303 transitions. [2021-02-19 17:54:42,191 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) [2021-02-19 17:54:42,191 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 303 transitions. [2021-02-19 17:54:42,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:54:42,191 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:54:42,191 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:54:42,391 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 420 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2168 [2021-02-19 17:54:42,391 INFO L428 AbstractCegarLoop]: === Iteration 426 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:54:42,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:54:42,392 INFO L82 PathProgramCache]: Analyzing trace with hash -152860817, now seen corresponding path program 420 times [2021-02-19 17:54:42,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:54:42,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952134314] [2021-02-19 17:54:42,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:54:42,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:54:42,658 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:54:42,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952134314] [2021-02-19 17:54:42,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998060319] [2021-02-19 17:54:42,659 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 [2021-02-19 17:54:42,678 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:54:42,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:54:42,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:54:42,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:54:43,239 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:54:43,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:54:43,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-02-19 17:54:43,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052869642] [2021-02-19 17:54:43,240 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:54:43,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:54:43,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:54:43,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:54:43,240 INFO L87 Difference]: Start difference. First operand 138 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) [2021-02-19 17:54:43,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:54:43,900 INFO L93 Difference]: Finished difference Result 163 states and 347 transitions. [2021-02-19 17:54:43,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:54:43,902 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 [2021-02-19 17:54:43,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:54:43,903 INFO L225 Difference]: With dead ends: 163 [2021-02-19 17:54:43,903 INFO L226 Difference]: Without dead ends: 163 [2021-02-19 17:54:43,903 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:54:43,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-02-19 17:54:43,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 131. [2021-02-19 17:54:43,904 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) [2021-02-19 17:54:43,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 285 transitions. [2021-02-19 17:54:43,904 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 285 transitions. Word has length 19 [2021-02-19 17:54:43,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:54:43,904 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 285 transitions. [2021-02-19 17:54:43,904 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) [2021-02-19 17:54:43,904 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 285 transitions. [2021-02-19 17:54:43,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:54:43,904 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:54:43,904 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:54:44,105 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2173,421 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:54:44,105 INFO L428 AbstractCegarLoop]: === Iteration 427 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:54:44,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:54:44,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1466728276, now seen corresponding path program 421 times [2021-02-19 17:54:44,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:54:44,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472786144] [2021-02-19 17:54:44,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:54:44,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:54:44,359 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:54:44,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472786144] [2021-02-19 17:54:44,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413538394] [2021-02-19 17:54:44,360 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 [2021-02-19 17:54:44,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:54:44,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:54:44,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:54:44,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:44,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:44,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:54:44,794 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:44,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:44,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:54:44,803 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:44,865 INFO L628 ElimStorePlain]: treesize reduction 38, result has 30.9 percent of original size [2021-02-19 17:54:44,865 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:54:44,867 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:54:44,867 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:67, output treesize:9 [2021-02-19 17:54:44,933 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:54:44,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:54:44,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-02-19 17:54:44,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496331118] [2021-02-19 17:54:44,934 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:54:44,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:54:44,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:54:44,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:54:44,934 INFO L87 Difference]: Start difference. First operand 131 states and 285 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) [2021-02-19 17:54:45,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:54:45,955 INFO L93 Difference]: Finished difference Result 176 states and 375 transitions. [2021-02-19 17:54:45,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:54:45,957 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 [2021-02-19 17:54:45,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:54:45,958 INFO L225 Difference]: With dead ends: 176 [2021-02-19 17:54:45,958 INFO L226 Difference]: Without dead ends: 176 [2021-02-19 17:54:45,958 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:54:45,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-02-19 17:54:45,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 132. [2021-02-19 17:54:45,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.1908396946564888) internal successors, (287), 131 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:54:45,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 287 transitions. [2021-02-19 17:54:45,959 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 287 transitions. Word has length 19 [2021-02-19 17:54:45,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:54:45,960 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 287 transitions. [2021-02-19 17:54:45,960 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) [2021-02-19 17:54:45,960 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 287 transitions. [2021-02-19 17:54:45,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:54:45,960 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:54:45,960 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:54:46,160 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 422 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2177 [2021-02-19 17:54:46,160 INFO L428 AbstractCegarLoop]: === Iteration 428 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:54:46,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:54:46,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1305537704, now seen corresponding path program 422 times [2021-02-19 17:54:46,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:54:46,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508642410] [2021-02-19 17:54:46,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:54:46,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:54:46,450 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:54:46,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508642410] [2021-02-19 17:54:46,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310385577] [2021-02-19 17:54:46,450 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 [2021-02-19 17:54:46,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:54:46,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:54:46,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:54:46,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:54:46,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:46,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:46,916 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 17 treesize of output 13 [2021-02-19 17:54:46,919 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:46,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:46,928 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 17 treesize of output 13 [2021-02-19 17:54:46,931 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:46,991 INFO L628 ElimStorePlain]: treesize reduction 40, result has 29.8 percent of original size [2021-02-19 17:54:46,991 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:54:46,993 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:54:46,993 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:67, output treesize:9 [2021-02-19 17:54:47,062 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:54:47,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:54:47,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-02-19 17:54:47,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666838349] [2021-02-19 17:54:47,062 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:54:47,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:54:47,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:54:47,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:54:47,063 INFO L87 Difference]: Start difference. First operand 132 states and 287 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) [2021-02-19 17:54:48,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:54:48,643 INFO L93 Difference]: Finished difference Result 188 states and 399 transitions. [2021-02-19 17:54:48,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:54:48,646 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 [2021-02-19 17:54:48,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:54:48,646 INFO L225 Difference]: With dead ends: 188 [2021-02-19 17:54:48,646 INFO L226 Difference]: Without dead ends: 188 [2021-02-19 17:54:48,646 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:54:48,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-02-19 17:54:48,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 133. [2021-02-19 17:54:48,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.1893939393939394) internal successors, (289), 132 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:54:48,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 289 transitions. [2021-02-19 17:54:48,648 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 289 transitions. Word has length 19 [2021-02-19 17:54:48,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:54:48,648 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 289 transitions. [2021-02-19 17:54:48,648 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) [2021-02-19 17:54:48,648 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 289 transitions. [2021-02-19 17:54:48,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:54:48,648 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:54:48,648 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:54:48,848 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 423 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2178 [2021-02-19 17:54:48,848 INFO L428 AbstractCegarLoop]: === Iteration 429 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:54:48,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:54:48,849 INFO L82 PathProgramCache]: Analyzing trace with hash 956552992, now seen corresponding path program 423 times [2021-02-19 17:54:48,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:54:48,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975856349] [2021-02-19 17:54:48,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:54:48,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:54:49,134 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:54:49,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975856349] [2021-02-19 17:54:49,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272926344] [2021-02-19 17:54:49,134 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 [2021-02-19 17:54:49,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:54:49,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:54:49,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:54:49,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:54:49,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:49,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:49,625 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 15 treesize of output 11 [2021-02-19 17:54:49,629 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:49,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:49,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:49,637 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 16 treesize of output 12 [2021-02-19 17:54:49,640 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:49,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:49,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:49,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:54:49,651 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:49,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:49,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:54:49,661 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:49,771 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 15 [2021-02-19 17:54:49,771 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-02-19 17:54:49,771 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:54:49,773 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:54:49,774 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-02-19 17:54:49,881 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:54:49,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:54:49,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:54:49,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800909915] [2021-02-19 17:54:49,881 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:54:49,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:54:49,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:54:49,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:54:49,881 INFO L87 Difference]: Start difference. First operand 133 states and 289 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) [2021-02-19 17:54:50,908 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2021-02-19 17:54:51,059 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2021-02-19 17:54:51,251 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 22 [2021-02-19 17:54:51,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:54:51,729 INFO L93 Difference]: Finished difference Result 199 states and 422 transitions. [2021-02-19 17:54:51,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 17:54:51,731 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 [2021-02-19 17:54:51,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:54:51,731 INFO L225 Difference]: With dead ends: 199 [2021-02-19 17:54:51,732 INFO L226 Difference]: Without dead ends: 199 [2021-02-19 17:54:51,732 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=122, Invalid=748, Unknown=0, NotChecked=0, Total=870 [2021-02-19 17:54:51,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-02-19 17:54:51,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 134. [2021-02-19 17:54:51,733 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) [2021-02-19 17:54:51,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 291 transitions. [2021-02-19 17:54:51,733 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 291 transitions. Word has length 19 [2021-02-19 17:54:51,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:54:51,733 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 291 transitions. [2021-02-19 17:54:51,733 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) [2021-02-19 17:54:51,733 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 291 transitions. [2021-02-19 17:54:51,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:54:51,734 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:54:51,734 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:54:51,934 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2179,424 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:54:51,934 INFO L428 AbstractCegarLoop]: === Iteration 430 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:54:51,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:54:51,934 INFO L82 PathProgramCache]: Analyzing trace with hash 714452953, now seen corresponding path program 424 times [2021-02-19 17:54:51,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:54:51,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961036316] [2021-02-19 17:54:51,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:54:51,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:54:52,088 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:54:52,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961036316] [2021-02-19 17:54:52,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716303379] [2021-02-19 17:54:52,089 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 [2021-02-19 17:54:52,106 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:54:52,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:54:52,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:54:52,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:54:52,699 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:54:52,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:54:52,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-02-19 17:54:52,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431090159] [2021-02-19 17:54:52,699 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:54:52,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:54:52,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:54:52,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:54:52,700 INFO L87 Difference]: Start difference. First operand 134 states and 291 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) [2021-02-19 17:54:52,997 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2021-02-19 17:54:53,516 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-02-19 17:54:53,825 WARN L202 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-02-19 17:54:54,180 WARN L202 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2021-02-19 17:54:54,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:54:54,428 INFO L93 Difference]: Finished difference Result 160 states and 344 transitions. [2021-02-19 17:54:54,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:54:54,431 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 [2021-02-19 17:54:54,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:54:54,431 INFO L225 Difference]: With dead ends: 160 [2021-02-19 17:54:54,431 INFO L226 Difference]: Without dead ends: 160 [2021-02-19 17:54:54,431 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:54:54,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-02-19 17:54:54,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 131. [2021-02-19 17:54:54,433 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) [2021-02-19 17:54:54,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 285 transitions. [2021-02-19 17:54:54,433 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 285 transitions. Word has length 19 [2021-02-19 17:54:54,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:54:54,433 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 285 transitions. [2021-02-19 17:54:54,433 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) [2021-02-19 17:54:54,433 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 285 transitions. [2021-02-19 17:54:54,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:54:54,433 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:54:54,433 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:54:54,645 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 425 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2189 [2021-02-19 17:54:54,646 INFO L428 AbstractCegarLoop]: === Iteration 431 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:54:54,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:54:54,646 INFO L82 PathProgramCache]: Analyzing trace with hash -1949193794, now seen corresponding path program 425 times [2021-02-19 17:54:54,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:54:54,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831560006] [2021-02-19 17:54:54,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:54:54,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:54:54,785 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:54:54,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831560006] [2021-02-19 17:54:54,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838007184] [2021-02-19 17:54:54,786 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 [2021-02-19 17:54:54,803 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 17:54:54,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:54:54,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:54:54,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:54:55,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:55,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:55,156 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 15 treesize of output 11 [2021-02-19 17:54:55,159 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:55,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:55,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:54:55,169 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:55,212 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-02-19 17:54:55,212 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:54:55,214 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:54:55,214 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-02-19 17:54:55,264 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:54:55,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:54:55,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-02-19 17:54:55,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883147494] [2021-02-19 17:54:55,264 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:54:55,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:54:55,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:54:55,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:54:55,265 INFO L87 Difference]: Start difference. First operand 131 states and 285 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) [2021-02-19 17:54:56,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:54:56,121 INFO L93 Difference]: Finished difference Result 176 states and 375 transitions. [2021-02-19 17:54:56,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:54:56,124 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 [2021-02-19 17:54:56,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:54:56,124 INFO L225 Difference]: With dead ends: 176 [2021-02-19 17:54:56,124 INFO L226 Difference]: Without dead ends: 176 [2021-02-19 17:54:56,124 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:54:56,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-02-19 17:54:56,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 133. [2021-02-19 17:54:56,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.1893939393939394) internal successors, (289), 132 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:54:56,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 289 transitions. [2021-02-19 17:54:56,127 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 289 transitions. Word has length 19 [2021-02-19 17:54:56,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:54:56,128 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 289 transitions. [2021-02-19 17:54:56,128 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) [2021-02-19 17:54:56,128 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 289 transitions. [2021-02-19 17:54:56,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:54:56,128 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:54:56,128 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:54:56,341 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2201,426 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:54:56,342 INFO L428 AbstractCegarLoop]: === Iteration 432 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:54:56,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:54:56,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1996788790, now seen corresponding path program 426 times [2021-02-19 17:54:56,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:54:56,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245995570] [2021-02-19 17:54:56,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:54:56,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:54:56,504 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:54:56,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245995570] [2021-02-19 17:54:56,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88651297] [2021-02-19 17:54:56,504 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 [2021-02-19 17:54:56,522 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:54:56,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:54:56,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:54:56,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:54:56,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:56,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:56,804 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 18 treesize of output 14 [2021-02-19 17:54:56,807 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:56,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:56,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:56,815 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 [2021-02-19 17:54:56,819 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:56,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:56,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:56,827 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 [2021-02-19 17:54:56,831 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:56,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:56,837 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 [2021-02-19 17:54:56,841 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:57,001 WARN L202 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-02-19 17:54:57,002 INFO L628 ElimStorePlain]: treesize reduction 73, result has 38.7 percent of original size [2021-02-19 17:54:57,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:57,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:54:57,008 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:54:57,059 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:54:57,062 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:54:57,062 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:141, output treesize:22 [2021-02-19 17:54:57,228 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:54:57,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:54:57,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-02-19 17:54:57,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559142121] [2021-02-19 17:54:57,229 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:54:57,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:54:57,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:54:57,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:54:57,229 INFO L87 Difference]: Start difference. First operand 133 states and 289 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) [2021-02-19 17:54:58,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:54:58,551 INFO L93 Difference]: Finished difference Result 197 states and 418 transitions. [2021-02-19 17:54:58,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:54:58,553 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 [2021-02-19 17:54:58,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:54:58,554 INFO L225 Difference]: With dead ends: 197 [2021-02-19 17:54:58,554 INFO L226 Difference]: Without dead ends: 197 [2021-02-19 17:54:58,554 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-02-19 17:54:58,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-02-19 17:54:58,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 134. [2021-02-19 17:54:58,555 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) [2021-02-19 17:54:58,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 291 transitions. [2021-02-19 17:54:58,555 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 291 transitions. Word has length 19 [2021-02-19 17:54:58,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:54:58,556 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 291 transitions. [2021-02-19 17:54:58,556 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) [2021-02-19 17:54:58,556 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 291 transitions. [2021-02-19 17:54:58,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:54:58,556 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:54:58,556 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:54:58,756 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 427 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2205 [2021-02-19 17:54:58,756 INFO L428 AbstractCegarLoop]: === Iteration 433 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:54:58,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:54:58,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1754688751, now seen corresponding path program 427 times [2021-02-19 17:54:58,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:54:58,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80410959] [2021-02-19 17:54:58,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:54:58,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:54:59,080 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:54:59,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80410959] [2021-02-19 17:54:59,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914627499] [2021-02-19 17:54:59,080 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 [2021-02-19 17:54:59,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:54:59,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:54:59,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:54:59,656 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:54:59,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:54:59,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-02-19 17:54:59,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905646825] [2021-02-19 17:54:59,657 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:54:59,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:54:59,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:54:59,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:54:59,657 INFO L87 Difference]: Start difference. First operand 134 states and 291 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) [2021-02-19 17:54:59,954 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2021-02-19 17:55:00,347 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-02-19 17:55:00,888 WARN L202 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2021-02-19 17:55:01,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:55:01,180 INFO L93 Difference]: Finished difference Result 156 states and 336 transitions. [2021-02-19 17:55:01,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:55:01,183 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 [2021-02-19 17:55:01,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:55:01,183 INFO L225 Difference]: With dead ends: 156 [2021-02-19 17:55:01,184 INFO L226 Difference]: Without dead ends: 156 [2021-02-19 17:55:01,184 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:55:01,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-02-19 17:55:01,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 132. [2021-02-19 17:55:01,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.1908396946564888) internal successors, (287), 131 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:55:01,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 287 transitions. [2021-02-19 17:55:01,185 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 287 transitions. Word has length 19 [2021-02-19 17:55:01,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:55:01,185 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 287 transitions. [2021-02-19 17:55:01,185 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) [2021-02-19 17:55:01,185 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 287 transitions. [2021-02-19 17:55:01,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:55:01,185 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:55:01,186 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:55:01,386 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2208,428 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:55:01,386 INFO L428 AbstractCegarLoop]: === Iteration 434 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:55:01,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:55:01,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1710433184, now seen corresponding path program 428 times [2021-02-19 17:55:01,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:55:01,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427504481] [2021-02-19 17:55:01,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:55:01,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:55:01,673 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:55:01,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427504481] [2021-02-19 17:55:01,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913591683] [2021-02-19 17:55:01,673 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 [2021-02-19 17:55:01,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:55:01,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:55:01,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:55:01,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:55:02,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:55:02,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:55:02,039 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 18 treesize of output 14 [2021-02-19 17:55:02,042 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:55:02,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:55:02,050 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 [2021-02-19 17:55:02,054 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:55:02,259 WARN L202 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2021-02-19 17:55:02,260 INFO L628 ElimStorePlain]: treesize reduction 78, result has 40.5 percent of original size [2021-02-19 17:55:02,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:55:02,267 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 12 treesize of output 8 [2021-02-19 17:55:02,273 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:55:02,340 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:55:02,346 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 [2021-02-19 17:55:02,349 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:55:02,412 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:55:02,412 INFO L518 ElimStorePlain]: Eliminatee v_prenex_326 vanished before elimination [2021-02-19 17:55:02,414 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:55:02,415 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:141, output treesize:22 [2021-02-19 17:55:02,604 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:55:02,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:55:02,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-02-19 17:55:02,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534526791] [2021-02-19 17:55:02,605 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:55:02,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:55:02,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:55:02,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:55:02,605 INFO L87 Difference]: Start difference. First operand 132 states and 287 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) [2021-02-19 17:55:02,960 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2021-02-19 17:55:03,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:55:03,718 INFO L93 Difference]: Finished difference Result 184 states and 385 transitions. [2021-02-19 17:55:03,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:55:03,719 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 [2021-02-19 17:55:03,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:55:03,719 INFO L225 Difference]: With dead ends: 184 [2021-02-19 17:55:03,719 INFO L226 Difference]: Without dead ends: 184 [2021-02-19 17:55:03,719 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:55:03,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-02-19 17:55:03,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 134. [2021-02-19 17:55:03,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.1954887218045114) internal successors, (292), 133 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) [2021-02-19 17:55:03,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 292 transitions. [2021-02-19 17:55:03,721 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 292 transitions. Word has length 19 [2021-02-19 17:55:03,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:55:03,721 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 292 transitions. [2021-02-19 17:55:03,721 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) [2021-02-19 17:55:03,721 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 292 transitions. [2021-02-19 17:55:03,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:55:03,721 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:55:03,721 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:55:03,922 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 429 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2218 [2021-02-19 17:55:03,922 INFO L428 AbstractCegarLoop]: === Iteration 435 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:55:03,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:55:03,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1952533223, now seen corresponding path program 429 times [2021-02-19 17:55:03,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:55:03,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289710795] [2021-02-19 17:55:03,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:55:03,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:55:04,210 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:55:04,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289710795] [2021-02-19 17:55:04,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621485173] [2021-02-19 17:55:04,211 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 [2021-02-19 17:55:04,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 17:55:04,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:55:04,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:55:04,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:55:04,842 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:55:04,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:55:04,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:55:04,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049632883] [2021-02-19 17:55:04,842 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:55:04,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:55:04,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:55:04,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:55:04,843 INFO L87 Difference]: Start difference. First operand 134 states and 292 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) [2021-02-19 17:55:05,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:55:05,811 INFO L93 Difference]: Finished difference Result 218 states and 449 transitions. [2021-02-19 17:55:05,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:55:05,813 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 [2021-02-19 17:55:05,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:55:05,814 INFO L225 Difference]: With dead ends: 218 [2021-02-19 17:55:05,814 INFO L226 Difference]: Without dead ends: 218 [2021-02-19 17:55:05,814 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:55:05,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-02-19 17:55:05,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 135. [2021-02-19 17:55:05,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.216417910447761) internal successors, (297), 134 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) [2021-02-19 17:55:05,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 297 transitions. [2021-02-19 17:55:05,815 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 297 transitions. Word has length 19 [2021-02-19 17:55:05,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:55:05,815 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 297 transitions. [2021-02-19 17:55:05,815 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) [2021-02-19 17:55:05,815 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 297 transitions. [2021-02-19 17:55:05,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:55:05,816 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:55:05,816 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:55:06,020 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 430 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2222 [2021-02-19 17:55:06,020 INFO L428 AbstractCegarLoop]: === Iteration 436 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:55:06,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:55:06,020 INFO L82 PathProgramCache]: Analyzing trace with hash -877793952, now seen corresponding path program 430 times [2021-02-19 17:55:06,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:55:06,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342829314] [2021-02-19 17:55:06,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:55:06,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:55:06,351 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:55:06,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342829314] [2021-02-19 17:55:06,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548671545] [2021-02-19 17:55:06,351 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 [2021-02-19 17:55:06,369 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:55:06,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:55:06,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:55:06,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:55:06,912 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:55:06,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:55:06,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:55:06,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181696387] [2021-02-19 17:55:06,912 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:55:06,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:55:06,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:55:06,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:55:06,912 INFO L87 Difference]: Start difference. First operand 135 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) [2021-02-19 17:55:07,258 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-02-19 17:55:07,839 WARN L202 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-02-19 17:55:08,131 WARN L202 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 36 [2021-02-19 17:55:08,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:55:08,167 INFO L93 Difference]: Finished difference Result 146 states and 315 transitions. [2021-02-19 17:55:08,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:55:08,170 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 [2021-02-19 17:55:08,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:55:08,170 INFO L225 Difference]: With dead ends: 146 [2021-02-19 17:55:08,170 INFO L226 Difference]: Without dead ends: 142 [2021-02-19 17:55:08,170 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:55:08,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-02-19 17:55:08,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 135. [2021-02-19 17:55:08,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.208955223880597) internal successors, (296), 134 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) [2021-02-19 17:55:08,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 296 transitions. [2021-02-19 17:55:08,172 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 296 transitions. Word has length 19 [2021-02-19 17:55:08,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:55:08,172 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 296 transitions. [2021-02-19 17:55:08,172 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) [2021-02-19 17:55:08,172 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 296 transitions. [2021-02-19 17:55:08,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:55:08,172 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:55:08,172 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:55:08,372 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 431 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2234 [2021-02-19 17:55:08,373 INFO L428 AbstractCegarLoop]: === Iteration 437 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:55:08,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:55:08,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1807204271, now seen corresponding path program 431 times [2021-02-19 17:55:08,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:55:08,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85157893] [2021-02-19 17:55:08,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:55:08,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:55:08,536 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:55:08,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85157893] [2021-02-19 17:55:08,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286067043] [2021-02-19 17:55:08,537 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 [2021-02-19 17:55:08,555 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 17:55:08,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:55:08,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:55:08,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:55:09,003 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:55:09,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:55:09,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-02-19 17:55:09,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701819942] [2021-02-19 17:55:09,004 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:55:09,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:55:09,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:55:09,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:55:09,004 INFO L87 Difference]: Start difference. First operand 135 states and 296 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) [2021-02-19 17:55:09,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:55:09,904 INFO L93 Difference]: Finished difference Result 171 states and 366 transitions. [2021-02-19 17:55:09,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:55:09,907 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 [2021-02-19 17:55:09,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:55:09,907 INFO L225 Difference]: With dead ends: 171 [2021-02-19 17:55:09,907 INFO L226 Difference]: Without dead ends: 171 [2021-02-19 17:55:09,908 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:55:09,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-02-19 17:55:09,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 130. [2021-02-19 17:55:09,909 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) [2021-02-19 17:55:09,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 283 transitions. [2021-02-19 17:55:09,909 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 283 transitions. Word has length 19 [2021-02-19 17:55:09,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:55:09,909 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 283 transitions. [2021-02-19 17:55:09,909 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) [2021-02-19 17:55:09,909 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 283 transitions. [2021-02-19 17:55:09,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:55:09,909 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:55:09,909 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:55:10,110 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2239,432 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:55:10,110 INFO L428 AbstractCegarLoop]: === Iteration 438 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:55:10,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:55:10,110 INFO L82 PathProgramCache]: Analyzing trace with hash 233344872, now seen corresponding path program 432 times [2021-02-19 17:55:10,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:55:10,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496033047] [2021-02-19 17:55:10,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:55:10,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:55:10,428 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:55:10,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496033047] [2021-02-19 17:55:10,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330495178] [2021-02-19 17:55:10,428 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 [2021-02-19 17:55:10,448 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:55:10,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:55:10,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:55:10,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:55:10,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:55:10,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:55:10,788 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 15 treesize of output 11 [2021-02-19 17:55:10,790 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:55:10,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:55:10,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:55:10,794 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:55:10,818 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-02-19 17:55:10,818 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:55:10,819 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:55:10,819 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-02-19 17:55:10,828 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:55:10,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:55:10,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:55:10,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401277774] [2021-02-19 17:55:10,829 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:55:10,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:55:10,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:55:10,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:55:10,829 INFO L87 Difference]: Start difference. First operand 130 states and 283 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) [2021-02-19 17:55:11,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:55:11,504 INFO L93 Difference]: Finished difference Result 165 states and 353 transitions. [2021-02-19 17:55:11,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:55:11,506 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 [2021-02-19 17:55:11,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:55:11,506 INFO L225 Difference]: With dead ends: 165 [2021-02-19 17:55:11,506 INFO L226 Difference]: Without dead ends: 165 [2021-02-19 17:55:11,507 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:55:11,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-02-19 17:55:11,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 133. [2021-02-19 17:55:11,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.1893939393939394) internal successors, (289), 132 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:55:11,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 289 transitions. [2021-02-19 17:55:11,508 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 289 transitions. Word has length 19 [2021-02-19 17:55:11,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:55:11,508 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 289 transitions. [2021-02-19 17:55:11,508 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) [2021-02-19 17:55:11,508 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 289 transitions. [2021-02-19 17:55:11,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:55:11,508 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:55:11,508 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:55:11,709 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 433 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2243 [2021-02-19 17:55:11,709 INFO L428 AbstractCegarLoop]: === Iteration 439 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:55:11,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:55:11,709 INFO L82 PathProgramCache]: Analyzing trace with hash -115639840, now seen corresponding path program 433 times [2021-02-19 17:55:11,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:55:11,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935037501] [2021-02-19 17:55:11,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:55:11,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:55:12,003 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:55:12,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935037501] [2021-02-19 17:55:12,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333353215] [2021-02-19 17:55:12,003 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 [2021-02-19 17:55:12,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:55:12,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:55:12,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:55:12,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:55:12,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:55:12,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:55:12,493 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:55:12,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:55:12,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:55:12,501 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 15 treesize of output 11 [2021-02-19 17:55:12,504 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:55:12,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:55:12,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:55:12,513 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 17 treesize of output 13 [2021-02-19 17:55:12,517 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:55:12,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:55:12,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:55:12,528 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:55:12,656 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 15 [2021-02-19 17:55:12,657 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-02-19 17:55:12,657 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:55:12,659 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:55:12,659 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-02-19 17:55:12,767 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:55:12,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:55:12,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:55:12,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333647805] [2021-02-19 17:55:12,768 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:55:12,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:55:12,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:55:12,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:55:12,768 INFO L87 Difference]: Start difference. First operand 133 states and 289 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) [2021-02-19 17:55:13,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:55:13,450 INFO L93 Difference]: Finished difference Result 188 states and 400 transitions. [2021-02-19 17:55:13,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:55:13,452 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 [2021-02-19 17:55:13,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:55:13,452 INFO L225 Difference]: With dead ends: 188 [2021-02-19 17:55:13,452 INFO L226 Difference]: Without dead ends: 188 [2021-02-19 17:55:13,452 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:55:13,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-02-19 17:55:13,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 134. [2021-02-19 17:55:13,454 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) [2021-02-19 17:55:13,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 291 transitions. [2021-02-19 17:55:13,454 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 291 transitions. Word has length 19 [2021-02-19 17:55:13,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:55:13,454 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 291 transitions. [2021-02-19 17:55:13,454 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) [2021-02-19 17:55:13,454 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 291 transitions. [2021-02-19 17:55:13,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:55:13,454 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:55:13,454 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:55:13,655 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2247,434 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:55:13,655 INFO L428 AbstractCegarLoop]: === Iteration 440 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:55:13,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:55:13,655 INFO L82 PathProgramCache]: Analyzing trace with hash -357739879, now seen corresponding path program 434 times [2021-02-19 17:55:13,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:55:13,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525462172] [2021-02-19 17:55:13,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:55:13,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:55:13,992 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:55:13,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525462172] [2021-02-19 17:55:13,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2443345] [2021-02-19 17:55:13,992 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 [2021-02-19 17:55:14,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:55:14,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:55:14,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:55:14,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:55:14,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:55:14,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:55:14,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:55:14,252 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:55:14,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:55:14,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:55:14,257 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 17 treesize of output 13 [2021-02-19 17:55:14,258 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:55:14,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:55:14,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:55:14,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-02-19 17:55:14,263 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:55:14,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:55:14,267 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 18 treesize of output 14 [2021-02-19 17:55:14,268 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:55:14,346 INFO L628 ElimStorePlain]: treesize reduction 65, result has 38.1 percent of original size [2021-02-19 17:55:14,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:55:14,350 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 9 treesize of output 5 [2021-02-19 17:55:14,352 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:55:14,383 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:55:14,385 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:55:14,385 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:133, output treesize:22 [2021-02-19 17:55:14,469 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:55:14,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:55:14,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-02-19 17:55:14,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836633328] [2021-02-19 17:55:14,469 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:55:14,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:55:14,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:55:14,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:55:14,469 INFO L87 Difference]: Start difference. First operand 134 states and 291 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) [2021-02-19 17:55:14,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:55:14,961 INFO L93 Difference]: Finished difference Result 150 states and 323 transitions. [2021-02-19 17:55:14,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:55:14,963 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 [2021-02-19 17:55:14,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:55:14,963 INFO L225 Difference]: With dead ends: 150 [2021-02-19 17:55:14,963 INFO L226 Difference]: Without dead ends: 150 [2021-02-19 17:55:14,963 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:55:14,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-02-19 17:55:14,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 132. [2021-02-19 17:55:14,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.1908396946564888) internal successors, (287), 131 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:55:14,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 287 transitions. [2021-02-19 17:55:14,965 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 287 transitions. Word has length 19 [2021-02-19 17:55:14,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:55:14,965 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 287 transitions. [2021-02-19 17:55:14,965 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) [2021-02-19 17:55:14,965 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 287 transitions. [2021-02-19 17:55:14,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:55:14,965 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:55:14,965 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:55:15,165 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 435 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2257 [2021-02-19 17:55:15,165 INFO L428 AbstractCegarLoop]: === Iteration 441 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:55:15,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:55:15,166 INFO L82 PathProgramCache]: Analyzing trace with hash 472105482, now seen corresponding path program 435 times [2021-02-19 17:55:15,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:55:15,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664300990] [2021-02-19 17:55:15,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:55:15,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:55:15,362 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:55:15,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664300990] [2021-02-19 17:55:15,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264132420] [2021-02-19 17:55:15,362 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 [2021-02-19 17:55:15,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:55:15,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:55:15,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:55:15,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:55:15,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:55:15,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:55:15,672 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 [2021-02-19 17:55:15,674 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:55:15,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:55:15,679 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 16 treesize of output 12 [2021-02-19 17:55:15,681 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:55:15,784 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 26 [2021-02-19 17:55:15,784 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-02-19 17:55:15,788 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 [2021-02-19 17:55:15,790 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:55:15,824 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:55:15,824 INFO L518 ElimStorePlain]: Eliminatee v_prenex_329 vanished before elimination [2021-02-19 17:55:15,824 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:55:15,826 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:55:15,826 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-02-19 17:55:15,923 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:55:15,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:55:15,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-02-19 17:55:15,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831722053] [2021-02-19 17:55:15,923 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:55:15,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:55:15,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:55:15,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:55:15,924 INFO L87 Difference]: Start difference. First operand 132 states and 287 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) [2021-02-19 17:55:16,595 WARN L202 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-02-19 17:55:16,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:55:16,763 INFO L93 Difference]: Finished difference Result 169 states and 354 transitions. [2021-02-19 17:55:16,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:55:16,765 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 [2021-02-19 17:55:16,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:55:16,765 INFO L225 Difference]: With dead ends: 169 [2021-02-19 17:55:16,765 INFO L226 Difference]: Without dead ends: 169 [2021-02-19 17:55:16,765 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:55:16,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-02-19 17:55:16,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 134. [2021-02-19 17:55:16,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.1954887218045114) internal successors, (292), 133 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) [2021-02-19 17:55:16,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 292 transitions. [2021-02-19 17:55:16,766 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 292 transitions. Word has length 19 [2021-02-19 17:55:16,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:55:16,766 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 292 transitions. [2021-02-19 17:55:16,767 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) [2021-02-19 17:55:16,767 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 292 transitions. [2021-02-19 17:55:16,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:55:16,767 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:55:16,767 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:55:16,967 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2261,436 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:55:16,967 INFO L428 AbstractCegarLoop]: === Iteration 442 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:55:16,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:55:16,967 INFO L82 PathProgramCache]: Analyzing trace with hash 230005443, now seen corresponding path program 436 times [2021-02-19 17:55:16,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:55:16,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565606921] [2021-02-19 17:55:16,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:55:16,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:55:17,142 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:55:17,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565606921] [2021-02-19 17:55:17,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478831528] [2021-02-19 17:55:17,142 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 [2021-02-19 17:55:17,160 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:55:17,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:55:17,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:55:17,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:55:17,513 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:55:17,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:55:17,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:55:17,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496507150] [2021-02-19 17:55:17,514 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:55:17,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:55:17,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:55:17,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:55:17,514 INFO L87 Difference]: Start difference. First operand 134 states and 292 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) [2021-02-19 17:55:18,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:55:18,219 INFO L93 Difference]: Finished difference Result 201 states and 414 transitions. [2021-02-19 17:55:18,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:55:18,220 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 [2021-02-19 17:55:18,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:55:18,221 INFO L225 Difference]: With dead ends: 201 [2021-02-19 17:55:18,221 INFO L226 Difference]: Without dead ends: 201 [2021-02-19 17:55:18,221 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:55:18,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-02-19 17:55:18,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 135. [2021-02-19 17:55:18,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.216417910447761) internal successors, (297), 134 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) [2021-02-19 17:55:18,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 297 transitions. [2021-02-19 17:55:18,222 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 297 transitions. Word has length 19 [2021-02-19 17:55:18,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:55:18,222 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 297 transitions. [2021-02-19 17:55:18,222 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) [2021-02-19 17:55:18,222 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 297 transitions. [2021-02-19 17:55:18,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:55:18,223 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:55:18,223 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:55:18,437 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 437 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2268 [2021-02-19 17:55:18,437 INFO L428 AbstractCegarLoop]: === Iteration 443 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:55:18,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:55:18,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1304744714, now seen corresponding path program 437 times [2021-02-19 17:55:18,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:55:18,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88616542] [2021-02-19 17:55:18,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:55:18,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:55:18,615 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:55:18,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88616542] [2021-02-19 17:55:18,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876201061] [2021-02-19 17:55:18,616 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 [2021-02-19 17:55:18,636 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:55:18,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:55:18,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:55:18,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:55:18,935 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:55:18,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:55:18,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:55:18,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132349616] [2021-02-19 17:55:18,936 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:55:18,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:55:18,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:55:18,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:55:18,936 INFO L87 Difference]: Start difference. First operand 135 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) [2021-02-19 17:55:19,486 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-02-19 17:55:19,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:55:19,673 INFO L93 Difference]: Finished difference Result 139 states and 301 transitions. [2021-02-19 17:55:19,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:55:19,675 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 [2021-02-19 17:55:19,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:55:19,675 INFO L225 Difference]: With dead ends: 139 [2021-02-19 17:55:19,675 INFO L226 Difference]: Without dead ends: 135 [2021-02-19 17:55:19,675 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:55:19,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-02-19 17:55:19,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2021-02-19 17:55:19,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.208955223880597) internal successors, (296), 134 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) [2021-02-19 17:55:19,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 296 transitions. [2021-02-19 17:55:19,677 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 296 transitions. Word has length 19 [2021-02-19 17:55:19,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:55:19,677 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 296 transitions. [2021-02-19 17:55:19,677 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) [2021-02-19 17:55:19,677 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 296 transitions. [2021-02-19 17:55:19,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:55:19,677 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:55:19,677 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:55:19,877 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 438 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2278 [2021-02-19 17:55:19,877 INFO L428 AbstractCegarLoop]: === Iteration 444 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:55:19,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:55:19,878 INFO L82 PathProgramCache]: Analyzing trace with hash -305224359, now seen corresponding path program 438 times [2021-02-19 17:55:19,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:55:19,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615387709] [2021-02-19 17:55:19,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:55:19,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:55:20,062 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:55:20,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615387709] [2021-02-19 17:55:20,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549341174] [2021-02-19 17:55:20,062 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 [2021-02-19 17:55:20,080 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:55:20,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:55:20,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:55:20,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:55:20,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:55:20,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:55:20,343 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 [2021-02-19 17:55:20,345 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:55:20,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:55:20,349 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 17 treesize of output 13 [2021-02-19 17:55:20,351 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:55:20,393 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-02-19 17:55:20,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:55:20,397 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 9 treesize of output 5 [2021-02-19 17:55:20,400 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:55:20,411 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:55:20,413 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:55:20,413 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-02-19 17:55:20,459 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:55:20,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:55:20,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-02-19 17:55:20,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966460457] [2021-02-19 17:55:20,459 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:55:20,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:55:20,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:55:20,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:55:20,460 INFO L87 Difference]: Start difference. First operand 135 states and 296 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) [2021-02-19 17:55:20,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:55:20,825 INFO L93 Difference]: Finished difference Result 159 states and 342 transitions. [2021-02-19 17:55:20,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:55:20,827 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 [2021-02-19 17:55:20,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:55:20,827 INFO L225 Difference]: With dead ends: 159 [2021-02-19 17:55:20,827 INFO L226 Difference]: Without dead ends: 159 [2021-02-19 17:55:20,827 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:55:20,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-02-19 17:55:20,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 131. [2021-02-19 17:55:20,828 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) [2021-02-19 17:55:20,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 285 transitions. [2021-02-19 17:55:20,829 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 285 transitions. Word has length 19 [2021-02-19 17:55:20,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:55:20,829 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 285 transitions. [2021-02-19 17:55:20,829 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) [2021-02-19 17:55:20,829 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 285 transitions. [2021-02-19 17:55:20,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:55:20,829 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:55:20,829 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:55:21,029 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2283,439 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:55:21,029 INFO L428 AbstractCegarLoop]: === Iteration 445 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:55:21,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:55:21,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1717578964, now seen corresponding path program 439 times [2021-02-19 17:55:21,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:55:21,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122936719] [2021-02-19 17:55:21,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:55:21,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:55:21,287 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:55:21,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122936719] [2021-02-19 17:55:21,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835845436] [2021-02-19 17:55:21,288 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 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 [2021-02-19 17:55:21,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:55:21,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:55:21,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:55:21,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:55:21,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:55:21,633 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 15 treesize of output 11 [2021-02-19 17:55:21,635 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:55:21,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:55:21,640 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 16 treesize of output 12 [2021-02-19 17:55:21,642 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:55:21,743 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 26 [2021-02-19 17:55:21,744 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-02-19 17:55:21,744 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:55:21,747 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 [2021-02-19 17:55:21,749 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:55:21,780 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:55:21,780 INFO L518 ElimStorePlain]: Eliminatee v_prenex_333 vanished before elimination [2021-02-19 17:55:21,782 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:55:21,782 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-02-19 17:55:21,845 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:55:21,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:55:21,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:55:21,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959704057] [2021-02-19 17:55:21,845 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:55:21,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:55:21,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:55:21,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:55:21,845 INFO L87 Difference]: Start difference. First operand 131 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) [2021-02-19 17:55:22,505 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-02-19 17:55:22,655 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2021-02-19 17:55:22,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:55:22,824 INFO L93 Difference]: Finished difference Result 177 states and 370 transitions. [2021-02-19 17:55:22,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:55:22,826 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 [2021-02-19 17:55:22,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:55:22,826 INFO L225 Difference]: With dead ends: 177 [2021-02-19 17:55:22,826 INFO L226 Difference]: Without dead ends: 177 [2021-02-19 17:55:22,826 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:55:22,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-02-19 17:55:22,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 134. [2021-02-19 17:55:22,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.218045112781955) internal successors, (295), 133 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) [2021-02-19 17:55:22,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 295 transitions. [2021-02-19 17:55:22,827 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 295 transitions. Word has length 19 [2021-02-19 17:55:22,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:55:22,827 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 295 transitions. [2021-02-19 17:55:22,827 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) [2021-02-19 17:55:22,827 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 295 transitions. [2021-02-19 17:55:22,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:55:22,828 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:55:22,828 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:55:23,028 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2285,440 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:55:23,028 INFO L428 AbstractCegarLoop]: === Iteration 446 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:55:23,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:55:23,028 INFO L82 PathProgramCache]: Analyzing trace with hash 878758467, now seen corresponding path program 440 times [2021-02-19 17:55:23,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:55:23,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150642048] [2021-02-19 17:55:23,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:55:23,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:55:23,207 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:55:23,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150642048] [2021-02-19 17:55:23,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74600880] [2021-02-19 17:55:23,207 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 [2021-02-19 17:55:23,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:55:23,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:55:23,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:55:23,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2021-02-19 17:55:23,505 WARN L219 SmtUtils]: Removed 3 from assertion stack [2021-02-19 17:55:23,705 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 441 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2292 [2021-02-19 17:55:23,705 WARN L545 AbstractCegarLoop]: Verification canceled [2021-02-19 17:55:23,708 WARN L224 ceAbstractionStarter]: Timeout [2021-02-19 17:55:23,708 INFO L202 PluginConnector]: Adding new model chromosome-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.02 05:55:23 BasicIcfg [2021-02-19 17:55:23,708 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-19 17:55:23,709 INFO L168 Benchmark]: Toolchain (without parser) took 595723.67 ms. Allocated memory was 255.9 MB in the beginning and 434.1 MB in the end (delta: 178.3 MB). Free memory was 236.4 MB in the beginning and 174.2 MB in the end (delta: 62.2 MB). Peak memory consumption was 242.4 MB. Max. memory is 16.0 GB. [2021-02-19 17:55:23,709 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 255.9 MB. Free memory was 237.6 MB in the beginning and 237.5 MB in the end (delta: 89.2 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-02-19 17:55:23,709 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.08 ms. Allocated memory is still 255.9 MB. Free memory was 235.9 MB in the beginning and 234.4 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-02-19 17:55:23,709 INFO L168 Benchmark]: Boogie Preprocessor took 19.72 ms. Allocated memory is still 255.9 MB. Free memory was 234.4 MB in the beginning and 233.4 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-02-19 17:55:23,709 INFO L168 Benchmark]: RCFGBuilder took 319.06 ms. Allocated memory is still 255.9 MB. Free memory was 233.4 MB in the beginning and 231.2 MB in the end (delta: 2.2 MB). Peak memory consumption was 18.5 MB. Max. memory is 16.0 GB. [2021-02-19 17:55:23,709 INFO L168 Benchmark]: TraceAbstraction took 595353.17 ms. Allocated memory was 255.9 MB in the beginning and 434.1 MB in the end (delta: 178.3 MB). Free memory was 230.6 MB in the beginning and 174.2 MB in the end (delta: 56.4 MB). Peak memory consumption was 234.3 MB. Max. memory is 16.0 GB. [2021-02-19 17:55:23,709 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 0.09 ms. Allocated memory is still 255.9 MB. Free memory was 237.6 MB in the beginning and 237.5 MB in the end (delta: 89.2 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 24.08 ms. Allocated memory is still 255.9 MB. Free memory was 235.9 MB in the beginning and 234.4 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 19.72 ms. Allocated memory is still 255.9 MB. Free memory was 234.4 MB in the beginning and 233.4 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 319.06 ms. Allocated memory is still 255.9 MB. Free memory was 233.4 MB in the beginning and 231.2 MB in the end (delta: 2.2 MB). Peak memory consumption was 18.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 595353.17 ms. Allocated memory was 255.9 MB in the beginning and 434.1 MB in the end (delta: 178.3 MB). Free memory was 230.6 MB in the beginning and 174.2 MB in the end (delta: 56.4 MB). Peak memory consumption was 234.3 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 75]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 75). Cancelled while BasicCegarLoop was analyzing trace of length 20 with TraceHistMax 4,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 27 for 30ms.. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 595.2s, OverallIterations: 446, TraceHistogramMax: 4, AutomataDifference: 261.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 12375 SDtfs, 13608 SDslu, 85792 SDs, 0 SdLazy, 139273 SolverSat, 4563 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 68.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 14042 GetRequests, 5085 SyntacticMatches, 478 SemanticMatches, 8479 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27829 ImplicationChecksByTransitivity, 273.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=166occurred in iteration=329, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.6s AutomataMinimizationTime, 445 MinimizatonAttempts, 11826 StatesRemovedByMinimization, 419 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.2s SsaConstructionTime, 4.2s SatisfiabilityAnalysisTime, 231.9s InterpolantComputationTime, 15613 NumberOfCodeBlocks, 15613 NumberOfCodeBlocksAsserted, 1491 NumberOfCheckSat, 14729 ConstructedInterpolants, 784 QuantifiedInterpolants, 2771786 SizeOfPredicates, 2418 NumberOfNonLiveVariables, 33311 ConjunctsInSsa, 9321 ConjunctsInUnsatCore, 884 InterpolantComputations, 6 PerfectInterpolantSequences, 1574/10145 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