/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/unroll-cond-4.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d47b94137d5c7dd60722882962a90fb345e61909-d47b941 [2021-05-03 14:08:55,126 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-03 14:08:55,128 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-03 14:08:55,158 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-03 14:08:55,200 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-05-03 14:08:55,226 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-03 14:08:55,227 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-03 14:08:55,227 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-03 14:08:55,227 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-03 14:08:55,229 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-03 14:08:55,229 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-03 14:08:55,229 INFO L138 SettingsManager]: * Use SBE=true [2021-05-03 14:08:55,229 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-03 14:08:55,229 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-03 14:08:55,229 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-03 14:08:55,230 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-03 14:08:55,230 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-03 14:08:55,230 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-03 14:08:55,230 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-03 14:08:55,230 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-03 14:08:55,230 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-03 14:08:55,230 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-03 14:08:55,230 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-03 14:08:55,231 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-03 14:08:55,231 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-03 14:08:55,231 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-03 14:08:55,231 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-03 14:08:55,231 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-03 14:08:55,231 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-03 14:08:55,231 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-03 14:08:55,231 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-03 14:08:55,231 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-03 14:08:55,231 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-03 14:08:55,231 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-03 14:08:55,232 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-03 14:08:55,232 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-03 14:08:55,232 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-03 14:08:55,514 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-03 14:08:55,551 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-03 14:08:55,553 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-03 14:08:55,553 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-03 14:08:55,568 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-03 14:08:55,571 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-cond-4.wvr.bpl [2021-05-03 14:08:55,572 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-cond-4.wvr.bpl' [2021-05-03 14:08:55,593 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-03 14:08:55,620 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-03 14:08:55,622 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-03 14:08:55,622 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-03 14:08:55,622 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-03 14:08:55,643 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:08:55" (1/1) ... [2021-05-03 14:08:55,648 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:08:55" (1/1) ... [2021-05-03 14:08:55,664 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-03 14:08:55,665 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-03 14:08:55,665 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-03 14:08:55,665 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-03 14:08:55,673 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:08:55" (1/1) ... [2021-05-03 14:08:55,673 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:08:55" (1/1) ... [2021-05-03 14:08:55,680 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:08:55" (1/1) ... [2021-05-03 14:08:55,680 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:08:55" (1/1) ... [2021-05-03 14:08:55,686 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:08:55" (1/1) ... [2021-05-03 14:08:55,687 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:08:55" (1/1) ... [2021-05-03 14:08:55,688 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:08:55" (1/1) ... [2021-05-03 14:08:55,689 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-03 14:08:55,689 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-03 14:08:55,689 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-03 14:08:55,689 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-03 14:08:55,709 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:08:55" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-03 14:08:55,762 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-05-03 14:08:55,762 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-05-03 14:08:55,763 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-05-03 14:08:55,763 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-05-03 14:08:55,763 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-05-03 14:08:55,763 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-05-03 14:08:55,763 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-03 14:08:55,763 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-03 14:08:55,763 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-03 14:08:55,764 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-03 14:08:56,127 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-03 14:08:56,127 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-03 14:08:56,128 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-05-03 14:08:56,129 INFO L202 PluginConnector]: Adding new model unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 02:08:56 BoogieIcfgContainer [2021-05-03 14:08:56,129 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-03 14:08:56,130 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-03 14:08:56,130 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-03 14:08:56,133 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-03 14:08:56,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:08:55" (1/2) ... [2021-05-03 14:08:56,134 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@306bd0d1 and model type unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 02:08:56, skipping insertion in model container [2021-05-03 14:08:56,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 02:08:56" (2/2) ... [2021-05-03 14:08:56,135 INFO L111 eAbstractionObserver]: Analyzing ICFG unroll-cond-4.wvr.bpl [2021-05-03 14:08:56,138 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-03 14:08:56,138 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-03 14:08:56,142 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-03 14:08:56,144 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-03 14:08:56,177 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-05-03 14:08:56,189 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-05-03 14:08:56,211 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-03 14:08:56,212 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-03 14:08:56,212 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-03 14:08:56,212 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-03 14:08:56,212 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-03 14:08:56,212 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-03 14:08:56,212 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-03 14:08:56,212 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-03 14:08:56,220 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 21 places, 16 transitions, 48 flow [2021-05-03 14:08:56,227 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 18 states, 16 states have (on average 1.8125) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:56,228 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.8125) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:56,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-05-03 14:08:56,232 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:56,232 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:56,233 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:56,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:56,236 INFO L82 PathProgramCache]: Analyzing trace with hash -1298021065, now seen corresponding path program 1 times [2021-05-03 14:08:56,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:56,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488475409] [2021-05-03 14:08:56,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:56,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:56,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:56,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488475409] [2021-05-03 14:08:56,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:08:56,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-03 14:08:56,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341222043] [2021-05-03 14:08:56,448 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-03 14:08:56,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:08:56,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-03 14:08:56,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-03 14:08:56,459 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.8125) 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) Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:56,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:56,500 INFO L93 Difference]: Finished difference Result 26 states and 43 transitions. [2021-05-03 14:08:56,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-03 14:08:56,501 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-05-03 14:08:56,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:56,507 INFO L225 Difference]: With dead ends: 26 [2021-05-03 14:08:56,507 INFO L226 Difference]: Without dead ends: 18 [2021-05-03 14:08:56,508 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 50.6ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-05-03 14:08:56,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-05-03 14:08:56,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-05-03 14:08:56,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:56,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 32 transitions. [2021-05-03 14:08:56,530 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 32 transitions. Word has length 10 [2021-05-03 14:08:56,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:56,531 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 32 transitions. [2021-05-03 14:08:56,531 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:56,531 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 32 transitions. [2021-05-03 14:08:56,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-05-03 14:08:56,531 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:56,531 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:56,532 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-03 14:08:56,532 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:56,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:56,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1253032747, now seen corresponding path program 2 times [2021-05-03 14:08:56,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:56,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514213973] [2021-05-03 14:08:56,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:56,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:56,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:56,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514213973] [2021-05-03 14:08:56,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:08:56,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-03 14:08:56,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888667166] [2021-05-03 14:08:56,598 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-03 14:08:56,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:08:56,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-03 14:08:56,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-05-03 14:08:56,600 INFO L87 Difference]: Start difference. First operand 18 states and 32 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:56,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:56,632 INFO L93 Difference]: Finished difference Result 28 states and 51 transitions. [2021-05-03 14:08:56,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 14:08:56,633 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-05-03 14:08:56,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:56,634 INFO L225 Difference]: With dead ends: 28 [2021-05-03 14:08:56,634 INFO L226 Difference]: Without dead ends: 23 [2021-05-03 14:08:56,636 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.2ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-05-03 14:08:56,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-05-03 14:08:56,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2021-05-03 14:08:56,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:56,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 35 transitions. [2021-05-03 14:08:56,642 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 35 transitions. Word has length 10 [2021-05-03 14:08:56,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:56,642 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 35 transitions. [2021-05-03 14:08:56,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:56,642 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 35 transitions. [2021-05-03 14:08:56,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-03 14:08:56,643 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:56,643 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:56,643 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-03 14:08:56,643 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:56,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:56,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1876900165, now seen corresponding path program 1 times [2021-05-03 14:08:56,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:56,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895451966] [2021-05-03 14:08:56,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:56,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:56,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:56,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895451966] [2021-05-03 14:08:56,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498918048] [2021-05-03 14:08:56,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:56,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:56,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-03 14:08:56,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:08:57,165 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 11 treesize of output 7 [2021-05-03 14:08:57,171 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:08:57,173 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:08:57,173 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:08:57,174 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-05-03 14:08:57,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:57,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:08:57,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-05-03 14:08:57,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266108982] [2021-05-03 14:08:57,187 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 14:08:57,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:08:57,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 14:08:57,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:08:57,189 INFO L87 Difference]: Start difference. First operand 20 states and 35 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:57,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:57,289 INFO L93 Difference]: Finished difference Result 30 states and 51 transitions. [2021-05-03 14:08:57,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-03 14:08:57,289 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-05-03 14:08:57,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:57,291 INFO L225 Difference]: With dead ends: 30 [2021-05-03 14:08:57,291 INFO L226 Difference]: Without dead ends: 22 [2021-05-03 14:08:57,297 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 180.1ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:08:57,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-05-03 14:08:57,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-05-03 14:08:57,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:57,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 40 transitions. [2021-05-03 14:08:57,301 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 40 transitions. Word has length 11 [2021-05-03 14:08:57,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:57,301 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 40 transitions. [2021-05-03 14:08:57,301 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:57,302 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 40 transitions. [2021-05-03 14:08:57,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-03 14:08:57,303 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:57,303 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:57,518 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-03 14:08:57,518 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:57,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:57,519 INFO L82 PathProgramCache]: Analyzing trace with hash 132986681, now seen corresponding path program 2 times [2021-05-03 14:08:57,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:57,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234911298] [2021-05-03 14:08:57,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:57,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:57,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:57,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234911298] [2021-05-03 14:08:57,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335637146] [2021-05-03 14:08:57,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-03 14:08:57,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:08:57,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:08:57,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-03 14:08:57,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:08:57,871 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:08:57,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 37 [2021-05-03 14:08:57,894 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 14:08:57,905 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:08:57,905 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 18 [2021-05-03 14:08:57,908 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:08:57,911 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 11 treesize of output 7 [2021-05-03 14:08:57,913 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:08:57,972 INFO L628 ElimStorePlain]: treesize reduction 34, result has 39.3 percent of original size [2021-05-03 14:08:57,973 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:08:57,973 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:73, output treesize:22 [2021-05-03 14:08:58,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:58,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:08:58,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-05-03 14:08:58,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292420039] [2021-05-03 14:08:58,023 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 14:08:58,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:08:58,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 14:08:58,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:08:58,025 INFO L87 Difference]: Start difference. First operand 22 states and 40 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:58,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:58,087 INFO L93 Difference]: Finished difference Result 35 states and 68 transitions. [2021-05-03 14:08:58,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:08:58,087 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-05-03 14:08:58,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:58,089 INFO L225 Difference]: With dead ends: 35 [2021-05-03 14:08:58,089 INFO L226 Difference]: Without dead ends: 30 [2021-05-03 14:08:58,089 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 193.1ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:08:58,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-03 14:08:58,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 22. [2021-05-03 14:08:58,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:58,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 40 transitions. [2021-05-03 14:08:58,093 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 40 transitions. Word has length 11 [2021-05-03 14:08:58,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:58,093 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 40 transitions. [2021-05-03 14:08:58,093 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:58,094 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 40 transitions. [2021-05-03 14:08:58,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-03 14:08:58,094 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:58,094 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:58,309 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:58,310 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:58,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:58,310 INFO L82 PathProgramCache]: Analyzing trace with hash -788714619, now seen corresponding path program 3 times [2021-05-03 14:08:58,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:58,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95758986] [2021-05-03 14:08:58,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:58,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:58,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:58,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95758986] [2021-05-03 14:08:58,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100980328] [2021-05-03 14:08:58,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:58,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 14:08:58,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:08:58,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-03 14:08:58,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:08:58,567 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:08:58,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 37 [2021-05-03 14:08:58,591 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 14:08:58,627 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:08:58,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 18 [2021-05-03 14:08:58,645 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:08:58,650 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 11 treesize of output 7 [2021-05-03 14:08:58,661 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:08:58,722 INFO L628 ElimStorePlain]: treesize reduction 34, result has 39.3 percent of original size [2021-05-03 14:08:58,723 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:08:58,723 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:73, output treesize:22 [2021-05-03 14:08:58,765 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:58,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:08:58,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-05-03 14:08:58,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753243183] [2021-05-03 14:08:58,766 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 14:08:58,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:08:58,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 14:08:58,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:08:58,767 INFO L87 Difference]: Start difference. First operand 22 states and 40 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:58,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:58,903 INFO L93 Difference]: Finished difference Result 51 states and 88 transitions. [2021-05-03 14:08:58,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 14:08:58,904 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-05-03 14:08:58,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:58,904 INFO L225 Difference]: With dead ends: 51 [2021-05-03 14:08:58,904 INFO L226 Difference]: Without dead ends: 41 [2021-05-03 14:08:58,905 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 164.2ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:08:58,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-03 14:08:58,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 26. [2021-05-03 14:08:58,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:58,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 46 transitions. [2021-05-03 14:08:58,907 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 46 transitions. Word has length 11 [2021-05-03 14:08:58,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:58,907 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 46 transitions. [2021-05-03 14:08:58,907 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:58,907 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 46 transitions. [2021-05-03 14:08:58,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-03 14:08:58,908 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:58,908 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:59,117 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-03 14:08:59,118 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:59,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:59,119 INFO L82 PathProgramCache]: Analyzing trace with hash 1870228548, now seen corresponding path program 1 times [2021-05-03 14:08:59,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:59,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911832300] [2021-05-03 14:08:59,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:59,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:59,167 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:59,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911832300] [2021-05-03 14:08:59,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:08:59,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-03 14:08:59,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377161124] [2021-05-03 14:08:59,173 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-03 14:08:59,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:08:59,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-03 14:08:59,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-03 14:08:59,174 INFO L87 Difference]: Start difference. First operand 26 states and 46 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:59,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:59,208 INFO L93 Difference]: Finished difference Result 29 states and 52 transitions. [2021-05-03 14:08:59,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-03 14:08:59,208 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-05-03 14:08:59,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:59,210 INFO L225 Difference]: With dead ends: 29 [2021-05-03 14:08:59,210 INFO L226 Difference]: Without dead ends: 29 [2021-05-03 14:08:59,211 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.7ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-03 14:08:59,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-03 14:08:59,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2021-05-03 14:08:59,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:59,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 49 transitions. [2021-05-03 14:08:59,218 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 49 transitions. Word has length 11 [2021-05-03 14:08:59,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:59,218 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 49 transitions. [2021-05-03 14:08:59,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:59,218 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 49 transitions. [2021-05-03 14:08:59,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-03 14:08:59,219 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:59,219 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:59,219 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-05-03 14:08:59,219 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:59,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:59,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1515210487, now seen corresponding path program 4 times [2021-05-03 14:08:59,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:59,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816955457] [2021-05-03 14:08:59,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:59,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:59,378 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:59,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816955457] [2021-05-03 14:08:59,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407926736] [2021-05-03 14:08:59,379 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) [2021-05-03 14:08:59,411 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:08:59,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:08:59,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-03 14:08:59,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:59,507 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:08:59,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-05-03 14:08:59,510 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:08:59,511 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:08:59,511 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:08:59,511 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:3 [2021-05-03 14:08:59,516 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:59,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:08:59,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-05-03 14:08:59,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471381002] [2021-05-03 14:08:59,517 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:08:59,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:08:59,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:08:59,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:08:59,518 INFO L87 Difference]: Start difference. First operand 27 states and 49 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:59,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:59,571 INFO L93 Difference]: Finished difference Result 37 states and 65 transitions. [2021-05-03 14:08:59,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:08:59,571 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) 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 12 [2021-05-03 14:08:59,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:59,572 INFO L225 Difference]: With dead ends: 37 [2021-05-03 14:08:59,572 INFO L226 Difference]: Without dead ends: 29 [2021-05-03 14:08:59,572 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 146.9ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:08:59,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-03 14:08:59,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-05-03 14:08:59,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:59,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 54 transitions. [2021-05-03 14:08:59,574 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 54 transitions. Word has length 12 [2021-05-03 14:08:59,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:59,574 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 54 transitions. [2021-05-03 14:08:59,574 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:59,574 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 54 transitions. [2021-05-03 14:08:59,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-03 14:08:59,575 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:59,575 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:59,775 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:59,775 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:59,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:59,776 INFO L82 PathProgramCache]: Analyzing trace with hash -228702997, now seen corresponding path program 5 times [2021-05-03 14:08:59,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:59,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4007823] [2021-05-03 14:08:59,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:59,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:59,946 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:59,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4007823] [2021-05-03 14:08:59,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948267291] [2021-05-03 14:08:59,947 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:59,966 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:08:59,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:08:59,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-03 14:08:59,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:00,037 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:00,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 37 [2021-05-03 14:09:00,051 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-05-03 14:09:00,056 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:00,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-05-03 14:09:00,060 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:09:00,077 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-05-03 14:09:00,078 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:09:00,078 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:18 [2021-05-03 14:09:00,150 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:00,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:00,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-05-03 14:09:00,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172846962] [2021-05-03 14:09:00,151 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:09:00,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:00,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:09:00,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:09:00,151 INFO L87 Difference]: Start difference. First operand 29 states and 54 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:00,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:00,235 INFO L93 Difference]: Finished difference Result 40 states and 76 transitions. [2021-05-03 14:09:00,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:09:00,235 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) 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 12 [2021-05-03 14:09:00,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:00,236 INFO L225 Difference]: With dead ends: 40 [2021-05-03 14:09:00,236 INFO L226 Difference]: Without dead ends: 35 [2021-05-03 14:09:00,236 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 158.2ms TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:09:00,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-03 14:09:00,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 29. [2021-05-03 14:09:00,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:00,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 54 transitions. [2021-05-03 14:09:00,243 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 54 transitions. Word has length 12 [2021-05-03 14:09:00,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:00,243 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 54 transitions. [2021-05-03 14:09:00,243 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:00,243 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 54 transitions. [2021-05-03 14:09:00,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-03 14:09:00,243 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:00,244 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:00,453 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-03 14:09:00,453 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:00,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:00,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1150404297, now seen corresponding path program 6 times [2021-05-03 14:09:00,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:00,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558524100] [2021-05-03 14:09:00,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:00,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:00,566 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:00,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558524100] [2021-05-03 14:09:00,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714199382] [2021-05-03 14:09:00,566 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:00,584 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-03 14:09:00,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:00,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-03 14:09:00,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:00,663 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:00,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 37 [2021-05-03 14:09:00,671 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-05-03 14:09:00,677 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:00,677 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-05-03 14:09:00,679 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:09:00,713 INFO L628 ElimStorePlain]: treesize reduction 23, result has 43.9 percent of original size [2021-05-03 14:09:00,714 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:09:00,714 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:18 [2021-05-03 14:09:00,752 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:00,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:00,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-05-03 14:09:00,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505448765] [2021-05-03 14:09:00,753 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:09:00,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:00,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:09:00,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:09:00,753 INFO L87 Difference]: Start difference. First operand 29 states and 54 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:00,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:00,890 INFO L93 Difference]: Finished difference Result 61 states and 110 transitions. [2021-05-03 14:09:00,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:09:00,891 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) 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 12 [2021-05-03 14:09:00,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:00,891 INFO L225 Difference]: With dead ends: 61 [2021-05-03 14:09:00,891 INFO L226 Difference]: Without dead ends: 51 [2021-05-03 14:09:00,891 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 163.5ms TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:09:00,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-03 14:09:00,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 29. [2021-05-03 14:09:00,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:00,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 54 transitions. [2021-05-03 14:09:00,894 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 54 transitions. Word has length 12 [2021-05-03 14:09:00,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:00,894 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 54 transitions. [2021-05-03 14:09:00,894 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:00,894 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 54 transitions. [2021-05-03 14:09:00,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-03 14:09:00,894 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:00,894 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:01,109 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:01,110 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:01,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:01,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1508538870, now seen corresponding path program 1 times [2021-05-03 14:09:01,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:01,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263892205] [2021-05-03 14:09:01,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:01,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:01,139 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:01,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263892205] [2021-05-03 14:09:01,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053908239] [2021-05-03 14:09:01,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:01,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:01,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-03 14:09:01,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:01,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:01,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:01,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-05-03 14:09:01,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257009441] [2021-05-03 14:09:01,286 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-03 14:09:01,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:01,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-03 14:09:01,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-03 14:09:01,287 INFO L87 Difference]: Start difference. First operand 29 states and 54 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:01,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:01,314 INFO L93 Difference]: Finished difference Result 59 states and 102 transitions. [2021-05-03 14:09:01,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-03 14:09:01,315 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-05-03 14:09:01,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:01,315 INFO L225 Difference]: With dead ends: 59 [2021-05-03 14:09:01,315 INFO L226 Difference]: Without dead ends: 59 [2021-05-03 14:09:01,316 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 18.7ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:09:01,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-05-03 14:09:01,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 30. [2021-05-03 14:09:01,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:01,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 58 transitions. [2021-05-03 14:09:01,334 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 58 transitions. Word has length 12 [2021-05-03 14:09:01,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:01,334 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 58 transitions. [2021-05-03 14:09:01,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:01,334 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 58 transitions. [2021-05-03 14:09:01,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-03 14:09:01,334 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:01,334 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:01,549 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:01,549 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:01,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:01,549 INFO L82 PathProgramCache]: Analyzing trace with hash -549695156, now seen corresponding path program 2 times [2021-05-03 14:09:01,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:01,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47709594] [2021-05-03 14:09:01,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:01,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:01,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:01,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47709594] [2021-05-03 14:09:01,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264738794] [2021-05-03 14:09:01,566 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:01,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:09:01,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:01,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-03 14:09:01,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:01,606 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:01,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:01,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-05-03 14:09:01,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868992187] [2021-05-03 14:09:01,607 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-03 14:09:01,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:01,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-03 14:09:01,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-03 14:09:01,607 INFO L87 Difference]: Start difference. First operand 30 states and 58 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:01,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:01,639 INFO L93 Difference]: Finished difference Result 43 states and 82 transitions. [2021-05-03 14:09:01,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:09:01,639 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-05-03 14:09:01,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:01,639 INFO L225 Difference]: With dead ends: 43 [2021-05-03 14:09:01,639 INFO L226 Difference]: Without dead ends: 43 [2021-05-03 14:09:01,640 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 22.4ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:09:01,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-03 14:09:01,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 32. [2021-05-03 14:09:01,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:01,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 64 transitions. [2021-05-03 14:09:01,642 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 64 transitions. Word has length 12 [2021-05-03 14:09:01,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:01,642 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 64 transitions. [2021-05-03 14:09:01,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:01,642 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 64 transitions. [2021-05-03 14:09:01,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-03 14:09:01,642 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:01,642 INFO L551 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:01,857 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-03 14:09:01,857 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:01,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:01,858 INFO L82 PathProgramCache]: Analyzing trace with hash -1107234939, now seen corresponding path program 7 times [2021-05-03 14:09:01,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:01,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616138521] [2021-05-03 14:09:01,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:01,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:01,969 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:01,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616138521] [2021-05-03 14:09:01,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819584923] [2021-05-03 14:09:01,969 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:02,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:02,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-03 14:09:02,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:02,141 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:02,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-05-03 14:09:02,149 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:09:02,150 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:02,150 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:09:02,151 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-05-03 14:09:02,155 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:02,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:02,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-05-03 14:09:02,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724366645] [2021-05-03 14:09:02,156 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:09:02,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:02,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:09:02,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:09:02,157 INFO L87 Difference]: Start difference. First operand 32 states and 64 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:02,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:02,219 INFO L93 Difference]: Finished difference Result 44 states and 87 transitions. [2021-05-03 14:09:02,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:09:02,219 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 13 [2021-05-03 14:09:02,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:02,220 INFO L225 Difference]: With dead ends: 44 [2021-05-03 14:09:02,220 INFO L226 Difference]: Without dead ends: 39 [2021-05-03 14:09:02,220 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 119.5ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:09:02,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-03 14:09:02,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2021-05-03 14:09:02,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:02,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 75 transitions. [2021-05-03 14:09:02,222 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 75 transitions. Word has length 13 [2021-05-03 14:09:02,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:02,222 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 75 transitions. [2021-05-03 14:09:02,222 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:02,222 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 75 transitions. [2021-05-03 14:09:02,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-03 14:09:02,222 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:02,222 INFO L551 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:02,437 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:02,438 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:02,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:02,438 INFO L82 PathProgramCache]: Analyzing trace with hash 522117573, now seen corresponding path program 8 times [2021-05-03 14:09:02,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:02,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568717562] [2021-05-03 14:09:02,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:02,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:02,520 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:02,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568717562] [2021-05-03 14:09:02,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980643708] [2021-05-03 14:09:02,520 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:02,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:09:02,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:02,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-03 14:09:02,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:02,708 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:02,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-05-03 14:09:02,715 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:09:02,717 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:02,717 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:09:02,717 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-05-03 14:09:02,723 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:02,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:02,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-05-03 14:09:02,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020663176] [2021-05-03 14:09:02,724 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:09:02,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:02,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:09:02,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:09:02,724 INFO L87 Difference]: Start difference. First operand 37 states and 75 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:02,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:02,912 INFO L93 Difference]: Finished difference Result 55 states and 100 transitions. [2021-05-03 14:09:02,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 14:09:02,912 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) 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 13 [2021-05-03 14:09:02,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:02,913 INFO L225 Difference]: With dead ends: 55 [2021-05-03 14:09:02,913 INFO L226 Difference]: Without dead ends: 50 [2021-05-03 14:09:02,913 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 125.3ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:09:02,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-03 14:09:02,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 37. [2021-05-03 14:09:02,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:02,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 75 transitions. [2021-05-03 14:09:02,915 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 75 transitions. Word has length 13 [2021-05-03 14:09:02,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:02,915 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 75 transitions. [2021-05-03 14:09:02,915 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:02,915 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 75 transitions. [2021-05-03 14:09:02,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-03 14:09:02,915 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:02,916 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:03,130 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:03,130 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:03,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:03,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1113906556, now seen corresponding path program 3 times [2021-05-03 14:09:03,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:03,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363751629] [2021-05-03 14:09:03,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:03,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:03,160 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:03,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363751629] [2021-05-03 14:09:03,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220954293] [2021-05-03 14:09:03,161 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:03,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 14:09:03,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:03,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-03 14:09:03,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:03,286 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:03,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:03,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-05-03 14:09:03,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553239277] [2021-05-03 14:09:03,286 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:09:03,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:03,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:09:03,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:09:03,287 INFO L87 Difference]: Start difference. First operand 37 states and 75 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:03,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:03,339 INFO L93 Difference]: Finished difference Result 85 states and 153 transitions. [2021-05-03 14:09:03,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:09:03,340 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-05-03 14:09:03,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:03,340 INFO L225 Difference]: With dead ends: 85 [2021-05-03 14:09:03,340 INFO L226 Difference]: Without dead ends: 85 [2021-05-03 14:09:03,340 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 37.1ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:09:03,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-05-03 14:09:03,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 38. [2021-05-03 14:09:03,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 2.135135135135135) internal successors, (79), 37 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:03,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 79 transitions. [2021-05-03 14:09:03,354 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 79 transitions. Word has length 13 [2021-05-03 14:09:03,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:03,354 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 79 transitions. [2021-05-03 14:09:03,354 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:03,354 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 79 transitions. [2021-05-03 14:09:03,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-03 14:09:03,356 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:03,356 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:03,572 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-05-03 14:09:03,573 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:03,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:03,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1122826714, now seen corresponding path program 4 times [2021-05-03 14:09:03,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:03,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800940565] [2021-05-03 14:09:03,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:03,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:03,608 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:03,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800940565] [2021-05-03 14:09:03,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131858880] [2021-05-03 14:09:03,609 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:09:03,640 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:09:03,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:03,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-03 14:09:03,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:03,682 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:03,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:03,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-05-03 14:09:03,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769272678] [2021-05-03 14:09:03,683 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:09:03,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:03,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:09:03,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:09:03,683 INFO L87 Difference]: Start difference. First operand 38 states and 79 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:03,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:03,724 INFO L93 Difference]: Finished difference Result 65 states and 121 transitions. [2021-05-03 14:09:03,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:09:03,724 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-05-03 14:09:03,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:03,724 INFO L225 Difference]: With dead ends: 65 [2021-05-03 14:09:03,724 INFO L226 Difference]: Without dead ends: 65 [2021-05-03 14:09:03,725 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 45.0ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:09:03,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-05-03 14:09:03,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 38. [2021-05-03 14:09:03,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 2.135135135135135) internal successors, (79), 37 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:03,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 79 transitions. [2021-05-03 14:09:03,726 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 79 transitions. Word has length 13 [2021-05-03 14:09:03,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:03,726 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 79 transitions. [2021-05-03 14:09:03,726 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:03,726 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 79 transitions. [2021-05-03 14:09:03,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-03 14:09:03,727 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:03,727 INFO L551 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:03,941 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:03,942 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:03,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:03,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1022462021, now seen corresponding path program 9 times [2021-05-03 14:09:03,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:03,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389400371] [2021-05-03 14:09:03,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:03,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:04,012 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:04,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389400371] [2021-05-03 14:09:04,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518814932] [2021-05-03 14:09:04,013 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:04,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:09:04,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:04,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-03 14:09:04,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:04,173 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:04,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-05-03 14:09:04,183 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:09:04,184 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:04,184 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:09:04,184 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-05-03 14:09:04,190 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:04,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:04,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-05-03 14:09:04,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377404044] [2021-05-03 14:09:04,191 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:09:04,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:04,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:09:04,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:09:04,191 INFO L87 Difference]: Start difference. First operand 38 states and 79 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:04,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:04,314 INFO L93 Difference]: Finished difference Result 78 states and 134 transitions. [2021-05-03 14:09:04,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:09:04,315 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) 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 13 [2021-05-03 14:09:04,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:04,315 INFO L225 Difference]: With dead ends: 78 [2021-05-03 14:09:04,315 INFO L226 Difference]: Without dead ends: 73 [2021-05-03 14:09:04,315 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 152.3ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:09:04,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-05-03 14:09:04,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 40. [2021-05-03 14:09:04,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 2.1025641025641026) internal successors, (82), 39 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:04,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 82 transitions. [2021-05-03 14:09:04,322 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 82 transitions. Word has length 13 [2021-05-03 14:09:04,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:04,323 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 82 transitions. [2021-05-03 14:09:04,323 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:04,323 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 82 transitions. [2021-05-03 14:09:04,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-03 14:09:04,323 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:04,323 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:04,541 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-05-03 14:09:04,541 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:04,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:04,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1742081348, now seen corresponding path program 5 times [2021-05-03 14:09:04,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:04,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782982090] [2021-05-03 14:09:04,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:04,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:04,599 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:04,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782982090] [2021-05-03 14:09:04,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893210788] [2021-05-03 14:09:04,599 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:04,626 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:09:04,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:04,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-03 14:09:04,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:04,687 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:04,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:04,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-05-03 14:09:04,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817400584] [2021-05-03 14:09:04,688 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:09:04,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:04,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:09:04,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:09:04,688 INFO L87 Difference]: Start difference. First operand 40 states and 82 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:04,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:04,739 INFO L93 Difference]: Finished difference Result 65 states and 130 transitions. [2021-05-03 14:09:04,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 14:09:04,739 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-05-03 14:09:04,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:04,739 INFO L225 Difference]: With dead ends: 65 [2021-05-03 14:09:04,739 INFO L226 Difference]: Without dead ends: 65 [2021-05-03 14:09:04,740 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 39.0ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:09:04,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-05-03 14:09:04,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 43. [2021-05-03 14:09:04,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 2.1666666666666665) internal successors, (91), 42 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:04,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 91 transitions. [2021-05-03 14:09:04,742 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 91 transitions. Word has length 13 [2021-05-03 14:09:04,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:04,742 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 91 transitions. [2021-05-03 14:09:04,742 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:04,742 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 91 transitions. [2021-05-03 14:09:04,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 14:09:04,742 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:04,742 INFO L551 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:04,962 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:04,963 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:04,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:04,963 INFO L82 PathProgramCache]: Analyzing trace with hash -798664521, now seen corresponding path program 10 times [2021-05-03 14:09:04,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:04,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681026323] [2021-05-03 14:09:04,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:04,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:04,996 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:04,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681026323] [2021-05-03 14:09:04,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865717589] [2021-05-03 14:09:04,997 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:05,028 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:09:05,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:05,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 14:09:05,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:05,060 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:05,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:05,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-05-03 14:09:05,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091871998] [2021-05-03 14:09:05,061 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:09:05,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:05,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:09:05,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:09:05,062 INFO L87 Difference]: Start difference. First operand 43 states and 91 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:05,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:05,102 INFO L93 Difference]: Finished difference Result 84 states and 148 transitions. [2021-05-03 14:09:05,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:09:05,103 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-05-03 14:09:05,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:05,103 INFO L225 Difference]: With dead ends: 84 [2021-05-03 14:09:05,103 INFO L226 Difference]: Without dead ends: 84 [2021-05-03 14:09:05,103 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 25.1ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:09:05,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-05-03 14:09:05,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 43. [2021-05-03 14:09:05,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 2.2142857142857144) internal successors, (93), 42 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:05,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 93 transitions. [2021-05-03 14:09:05,106 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 93 transitions. Word has length 14 [2021-05-03 14:09:05,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:05,106 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 93 transitions. [2021-05-03 14:09:05,106 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:05,106 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 93 transitions. [2021-05-03 14:09:05,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 14:09:05,107 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:05,107 INFO L551 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:05,321 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:05,322 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:05,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:05,322 INFO L82 PathProgramCache]: Analyzing trace with hash 861067660, now seen corresponding path program 6 times [2021-05-03 14:09:05,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:05,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565450211] [2021-05-03 14:09:05,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:05,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:05,347 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:05,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565450211] [2021-05-03 14:09:05,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561223450] [2021-05-03 14:09:05,347 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:09:05,367 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 14:09:05,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:05,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 14:09:05,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:05,390 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:05,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:05,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-05-03 14:09:05,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134813803] [2021-05-03 14:09:05,390 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:09:05,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:05,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:09:05,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:09:05,391 INFO L87 Difference]: Start difference. First operand 43 states and 93 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:05,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:05,457 INFO L93 Difference]: Finished difference Result 106 states and 189 transitions. [2021-05-03 14:09:05,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:09:05,457 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-05-03 14:09:05,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:05,458 INFO L225 Difference]: With dead ends: 106 [2021-05-03 14:09:05,458 INFO L226 Difference]: Without dead ends: 103 [2021-05-03 14:09:05,458 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 39.7ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:09:05,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-05-03 14:09:05,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 49. [2021-05-03 14:09:05,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 2.2916666666666665) internal successors, (110), 48 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:05,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 110 transitions. [2021-05-03 14:09:05,460 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 110 transitions. Word has length 14 [2021-05-03 14:09:05,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:05,460 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 110 transitions. [2021-05-03 14:09:05,460 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:05,460 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 110 transitions. [2021-05-03 14:09:05,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 14:09:05,460 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:05,460 INFO L551 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:05,675 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:05,675 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:05,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:05,675 INFO L82 PathProgramCache]: Analyzing trace with hash 830687991, now seen corresponding path program 11 times [2021-05-03 14:09:05,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:05,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479664596] [2021-05-03 14:09:05,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:05,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:05,706 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:05,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479664596] [2021-05-03 14:09:05,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359648965] [2021-05-03 14:09:05,707 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:09:05,749 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:09:05,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:05,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 14:09:05,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:05,772 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:05,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:05,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-05-03 14:09:05,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383837977] [2021-05-03 14:09:05,773 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:09:05,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:05,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:09:05,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:09:05,773 INFO L87 Difference]: Start difference. First operand 49 states and 110 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:05,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:05,854 INFO L93 Difference]: Finished difference Result 60 states and 123 transitions. [2021-05-03 14:09:05,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 14:09:05,854 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-05-03 14:09:05,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:05,854 INFO L225 Difference]: With dead ends: 60 [2021-05-03 14:09:05,854 INFO L226 Difference]: Without dead ends: 58 [2021-05-03 14:09:05,855 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 50.9ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:09:05,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-03 14:09:05,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 49. [2021-05-03 14:09:05,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 2.2708333333333335) internal successors, (109), 48 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:05,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 109 transitions. [2021-05-03 14:09:05,856 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 109 transitions. Word has length 14 [2021-05-03 14:09:05,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:05,856 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 109 transitions. [2021-05-03 14:09:05,856 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:05,856 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 109 transitions. [2021-05-03 14:09:05,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 14:09:05,857 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:05,857 INFO L551 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:06,072 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-05-03 14:09:06,072 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:06,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:06,072 INFO L82 PathProgramCache]: Analyzing trace with hash -805336138, now seen corresponding path program 7 times [2021-05-03 14:09:06,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:06,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946783284] [2021-05-03 14:09:06,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:06,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:06,105 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:06,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946783284] [2021-05-03 14:09:06,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757416060] [2021-05-03 14:09:06,105 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:06,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:06,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 14:09:06,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:06,371 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:06,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:06,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-05-03 14:09:06,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234299163] [2021-05-03 14:09:06,372 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:09:06,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:06,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:09:06,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:09:06,373 INFO L87 Difference]: Start difference. First operand 49 states and 109 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:06,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:06,410 INFO L93 Difference]: Finished difference Result 94 states and 171 transitions. [2021-05-03 14:09:06,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:09:06,410 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-05-03 14:09:06,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:06,411 INFO L225 Difference]: With dead ends: 94 [2021-05-03 14:09:06,411 INFO L226 Difference]: Without dead ends: 94 [2021-05-03 14:09:06,411 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 44.3ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:09:06,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-05-03 14:09:06,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 46. [2021-05-03 14:09:06,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:06,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 97 transitions. [2021-05-03 14:09:06,413 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 97 transitions. Word has length 14 [2021-05-03 14:09:06,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:06,413 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 97 transitions. [2021-05-03 14:09:06,413 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:06,413 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 97 transitions. [2021-05-03 14:09:06,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 14:09:06,414 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:06,414 INFO L551 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:06,628 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-05-03 14:09:06,629 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:06,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:06,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1972248533, now seen corresponding path program 12 times [2021-05-03 14:09:06,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:06,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142360489] [2021-05-03 14:09:06,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:06,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:06,697 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:06,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142360489] [2021-05-03 14:09:06,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901561310] [2021-05-03 14:09:06,697 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:06,756 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 14:09:06,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:06,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 14:09:06,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:06,780 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:06,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:06,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-05-03 14:09:06,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857079033] [2021-05-03 14:09:06,781 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:09:06,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:06,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:09:06,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:09:06,781 INFO L87 Difference]: Start difference. First operand 46 states and 97 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:06,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:06,825 INFO L93 Difference]: Finished difference Result 59 states and 113 transitions. [2021-05-03 14:09:06,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 14:09:06,826 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-05-03 14:09:06,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:06,826 INFO L225 Difference]: With dead ends: 59 [2021-05-03 14:09:06,826 INFO L226 Difference]: Without dead ends: 55 [2021-05-03 14:09:06,826 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 55.7ms TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:09:06,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-03 14:09:06,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2021-05-03 14:09:06,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.1333333333333333) internal successors, (96), 45 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) [2021-05-03 14:09:06,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 96 transitions. [2021-05-03 14:09:06,828 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 96 transitions. Word has length 14 [2021-05-03 14:09:06,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:06,828 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 96 transitions. [2021-05-03 14:09:06,828 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:06,828 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 96 transitions. [2021-05-03 14:09:06,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 14:09:06,828 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:06,828 INFO L551 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:07,041 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-05-03 14:09:07,041 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:07,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:07,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1431397132, now seen corresponding path program 8 times [2021-05-03 14:09:07,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:07,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810258717] [2021-05-03 14:09:07,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:07,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:07,108 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:07,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810258717] [2021-05-03 14:09:07,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823568186] [2021-05-03 14:09:07,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:07,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:09:07,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:07,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 14:09:07,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:07,202 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:07,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:07,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-05-03 14:09:07,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603679363] [2021-05-03 14:09:07,203 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:09:07,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:07,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:09:07,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:09:07,203 INFO L87 Difference]: Start difference. First operand 46 states and 96 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:07,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:07,258 INFO L93 Difference]: Finished difference Result 91 states and 166 transitions. [2021-05-03 14:09:07,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 14:09:07,259 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-05-03 14:09:07,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:07,260 INFO L225 Difference]: With dead ends: 91 [2021-05-03 14:09:07,260 INFO L226 Difference]: Without dead ends: 91 [2021-05-03 14:09:07,260 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 66.3ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:09:07,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-05-03 14:09:07,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 47. [2021-05-03 14:09:07,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 2.1739130434782608) internal successors, (100), 46 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) [2021-05-03 14:09:07,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 100 transitions. [2021-05-03 14:09:07,262 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 100 transitions. Word has length 14 [2021-05-03 14:09:07,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:07,262 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 100 transitions. [2021-05-03 14:09:07,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:07,262 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 100 transitions. [2021-05-03 14:09:07,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 14:09:07,262 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:07,262 INFO L551 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:07,476 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-05-03 14:09:07,477 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:07,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:07,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1331032439, now seen corresponding path program 13 times [2021-05-03 14:09:07,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:07,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216738280] [2021-05-03 14:09:07,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:07,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:07,592 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:07,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216738280] [2021-05-03 14:09:07,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186278672] [2021-05-03 14:09:07,593 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 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 [2021-05-03 14:09:07,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:07,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 14:09:07,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:08,092 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:08,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:08,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-05-03 14:09:08,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545309066] [2021-05-03 14:09:08,093 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:09:08,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:08,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:09:08,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:09:08,094 INFO L87 Difference]: Start difference. First operand 47 states and 100 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:08,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:08,136 INFO L93 Difference]: Finished difference Result 62 states and 119 transitions. [2021-05-03 14:09:08,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 14:09:08,136 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-05-03 14:09:08,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:08,137 INFO L225 Difference]: With dead ends: 62 [2021-05-03 14:09:08,137 INFO L226 Difference]: Without dead ends: 56 [2021-05-03 14:09:08,138 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 110.1ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:09:08,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-03 14:09:08,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 47. [2021-05-03 14:09:08,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:08,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 99 transitions. [2021-05-03 14:09:08,140 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 99 transitions. Word has length 14 [2021-05-03 14:09:08,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:08,141 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 99 transitions. [2021-05-03 14:09:08,141 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:08,141 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 99 transitions. [2021-05-03 14:09:08,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 14:09:08,142 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:08,142 INFO L551 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:08,356 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-05-03 14:09:08,357 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:08,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:08,357 INFO L82 PathProgramCache]: Analyzing trace with hash 2050651766, now seen corresponding path program 9 times [2021-05-03 14:09:08,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:08,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807885019] [2021-05-03 14:09:08,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:08,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:08,396 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:08,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807885019] [2021-05-03 14:09:08,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2160276] [2021-05-03 14:09:08,397 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:08,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:09:08,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:08,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 14:09:08,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:08,465 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:08,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:08,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-05-03 14:09:08,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284331047] [2021-05-03 14:09:08,465 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:09:08,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:08,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:09:08,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:09:08,466 INFO L87 Difference]: Start difference. First operand 47 states and 99 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:08,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:08,542 INFO L93 Difference]: Finished difference Result 88 states and 165 transitions. [2021-05-03 14:09:08,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:09:08,542 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-05-03 14:09:08,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:08,544 INFO L225 Difference]: With dead ends: 88 [2021-05-03 14:09:08,544 INFO L226 Difference]: Without dead ends: 88 [2021-05-03 14:09:08,544 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 47.6ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:09:08,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-05-03 14:09:08,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 47. [2021-05-03 14:09:08,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:08,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 99 transitions. [2021-05-03 14:09:08,554 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 99 transitions. Word has length 14 [2021-05-03 14:09:08,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:08,554 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 99 transitions. [2021-05-03 14:09:08,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:08,554 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 99 transitions. [2021-05-03 14:09:08,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 14:09:08,554 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:08,554 INFO L551 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:08,769 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:08,769 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:08,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:08,769 INFO L82 PathProgramCache]: Analyzing trace with hash 653527467, now seen corresponding path program 14 times [2021-05-03 14:09:08,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:08,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516963492] [2021-05-03 14:09:08,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:08,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:08,806 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:08,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516963492] [2021-05-03 14:09:08,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:09:08,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-03 14:09:08,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143385445] [2021-05-03 14:09:08,807 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:09:08,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:08,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:09:08,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:09:08,807 INFO L87 Difference]: Start difference. First operand 47 states and 99 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:08,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:08,825 INFO L93 Difference]: Finished difference Result 53 states and 106 transitions. [2021-05-03 14:09:08,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:09:08,826 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-05-03 14:09:08,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:08,826 INFO L225 Difference]: With dead ends: 53 [2021-05-03 14:09:08,826 INFO L226 Difference]: Without dead ends: 45 [2021-05-03 14:09:08,826 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.5ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:09:08,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-03 14:09:08,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-05-03 14:09:08,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 2.159090909090909) internal successors, (95), 44 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:08,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 95 transitions. [2021-05-03 14:09:08,832 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 95 transitions. Word has length 14 [2021-05-03 14:09:08,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:08,832 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 95 transitions. [2021-05-03 14:09:08,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:08,832 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 95 transitions. [2021-05-03 14:09:08,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 14:09:08,832 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:08,832 INFO L551 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:08,832 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2021-05-03 14:09:08,832 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:08,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:08,833 INFO L82 PathProgramCache]: Analyzing trace with hash -227291060, now seen corresponding path program 10 times [2021-05-03 14:09:08,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:08,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027552345] [2021-05-03 14:09:08,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:08,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:09,064 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:09,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027552345] [2021-05-03 14:09:09,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524727736] [2021-05-03 14:09:09,068 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:09,088 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:09:09,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:09,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 14:09:09,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:09,117 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:09,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:09,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-05-03 14:09:09,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049180364] [2021-05-03 14:09:09,118 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:09:09,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:09,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:09:09,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:09:09,119 INFO L87 Difference]: Start difference. First operand 45 states and 95 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:09,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:09,171 INFO L93 Difference]: Finished difference Result 91 states and 185 transitions. [2021-05-03 14:09:09,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 14:09:09,172 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-05-03 14:09:09,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:09,173 INFO L225 Difference]: With dead ends: 91 [2021-05-03 14:09:09,173 INFO L226 Difference]: Without dead ends: 91 [2021-05-03 14:09:09,173 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 210.6ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:09:09,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-05-03 14:09:09,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 51. [2021-05-03 14:09:09,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 2.2) internal successors, (110), 50 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:09,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 110 transitions. [2021-05-03 14:09:09,200 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 110 transitions. Word has length 14 [2021-05-03 14:09:09,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:09,201 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 110 transitions. [2021-05-03 14:09:09,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:09,201 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 110 transitions. [2021-05-03 14:09:09,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:09:09,201 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:09,201 INFO L551 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:09,417 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:09,417 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:09,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:09,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1836816026, now seen corresponding path program 11 times [2021-05-03 14:09:09,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:09,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287358317] [2021-05-03 14:09:09,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:09,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:09,506 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:09,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287358317] [2021-05-03 14:09:09,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124112304] [2021-05-03 14:09:09,506 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:09,556 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:09:09,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:09,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-03 14:09:09,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:09,804 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:09,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-05-03 14:09:09,825 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:09:09,826 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:09,827 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:09:09,827 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:3 [2021-05-03 14:09:09,831 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:09,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:09,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-03 14:09:09,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833671809] [2021-05-03 14:09:09,832 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:09:09,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:09,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:09:09,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:09:09,832 INFO L87 Difference]: Start difference. First operand 51 states and 110 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:09,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:09,935 INFO L93 Difference]: Finished difference Result 66 states and 137 transitions. [2021-05-03 14:09:09,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 14:09:09,935 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) 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 15 [2021-05-03 14:09:09,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:09,936 INFO L225 Difference]: With dead ends: 66 [2021-05-03 14:09:09,936 INFO L226 Difference]: Without dead ends: 56 [2021-05-03 14:09:09,936 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 210.9ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:09:09,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-03 14:09:09,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2021-05-03 14:09:09,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 2.1923076923076925) internal successors, (114), 52 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) [2021-05-03 14:09:09,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 114 transitions. [2021-05-03 14:09:09,938 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 114 transitions. Word has length 15 [2021-05-03 14:09:09,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:09,938 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 114 transitions. [2021-05-03 14:09:09,938 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:09,938 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 114 transitions. [2021-05-03 14:09:09,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:09:09,938 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:09,938 INFO L551 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:10,156 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:10,157 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:10,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:10,158 INFO L82 PathProgramCache]: Analyzing trace with hash 170412228, now seen corresponding path program 12 times [2021-05-03 14:09:10,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:10,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188321993] [2021-05-03 14:09:10,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:10,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:10,264 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:10,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188321993] [2021-05-03 14:09:10,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135901676] [2021-05-03 14:09:10,265 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 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 [2021-05-03 14:09:10,286 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 14:09:10,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:10,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 14:09:10,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:10,633 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 2061 DAG size of output: 48 [2021-05-03 14:09:10,685 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:10,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-05-03 14:09:10,707 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:09:10,708 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:10,708 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:09:10,708 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-05-03 14:09:10,713 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:10,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:10,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-03 14:09:10,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470196297] [2021-05-03 14:09:10,714 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:09:10,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:10,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:09:10,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:09:10,714 INFO L87 Difference]: Start difference. First operand 53 states and 114 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:10,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:10,906 INFO L93 Difference]: Finished difference Result 83 states and 179 transitions. [2021-05-03 14:09:10,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:09:10,906 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) 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 15 [2021-05-03 14:09:10,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:10,907 INFO L225 Difference]: With dead ends: 83 [2021-05-03 14:09:10,907 INFO L226 Difference]: Without dead ends: 69 [2021-05-03 14:09:10,907 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 192.9ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:09:10,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-03 14:09:10,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 58. [2021-05-03 14:09:10,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.3333333333333335) internal successors, (133), 57 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:10,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 133 transitions. [2021-05-03 14:09:10,908 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 133 transitions. Word has length 15 [2021-05-03 14:09:10,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:10,909 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 133 transitions. [2021-05-03 14:09:10,909 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:10,909 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 133 transitions. [2021-05-03 14:09:10,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:09:10,909 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:10,909 INFO L551 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:11,123 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-05-03 14:09:11,124 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:11,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:11,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1029286758, now seen corresponding path program 13 times [2021-05-03 14:09:11,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:11,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256664894] [2021-05-03 14:09:11,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:11,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:12,276 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:12,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256664894] [2021-05-03 14:09:12,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629602954] [2021-05-03 14:09:12,277 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:12,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:12,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 14:09:12,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:12,541 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-05-03 14:09:12,759 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:12,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-05-03 14:09:12,837 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-05-03 14:09:12,840 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-05-03 14:09:12,841 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:09:12,843 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-05-03 14:09:12,843 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:09:12,862 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:12,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-05-03 14:09:12,881 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:09:12,894 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-05-03 14:09:12,895 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:09:12,895 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-05-03 14:09:12,920 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:12,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:12,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-03 14:09:12,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25211066] [2021-05-03 14:09:12,921 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:09:12,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:12,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:09:12,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:09:12,922 INFO L87 Difference]: Start difference. First operand 58 states and 133 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:13,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:13,121 INFO L93 Difference]: Finished difference Result 102 states and 223 transitions. [2021-05-03 14:09:13,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:09:13,121 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) 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 15 [2021-05-03 14:09:13,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:13,122 INFO L225 Difference]: With dead ends: 102 [2021-05-03 14:09:13,122 INFO L226 Difference]: Without dead ends: 92 [2021-05-03 14:09:13,123 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1373.9ms TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:09:13,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-05-03 14:09:13,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 58. [2021-05-03 14:09:13,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.3333333333333335) internal successors, (133), 57 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:13,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 133 transitions. [2021-05-03 14:09:13,125 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 133 transitions. Word has length 15 [2021-05-03 14:09:13,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:13,125 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 133 transitions. [2021-05-03 14:09:13,125 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:13,125 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 133 transitions. [2021-05-03 14:09:13,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:09:13,125 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:13,125 INFO L551 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:13,340 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-05-03 14:09:13,341 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:13,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:13,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1887821798, now seen corresponding path program 14 times [2021-05-03 14:09:13,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:13,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138304274] [2021-05-03 14:09:13,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:13,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:13,434 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:13,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138304274] [2021-05-03 14:09:13,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340375568] [2021-05-03 14:09:13,434 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:13,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:09:13,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:13,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 14:09:13,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:13,668 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:13,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-05-03 14:09:13,681 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:09:13,683 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:13,683 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:09:13,683 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-05-03 14:09:13,688 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:13,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:13,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-03 14:09:13,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19394188] [2021-05-03 14:09:13,688 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:09:13,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:13,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:09:13,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:09:13,689 INFO L87 Difference]: Start difference. First operand 58 states and 133 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:13,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:13,878 INFO L93 Difference]: Finished difference Result 93 states and 210 transitions. [2021-05-03 14:09:13,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:09:13,879 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) 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 15 [2021-05-03 14:09:13,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:13,879 INFO L225 Difference]: With dead ends: 93 [2021-05-03 14:09:13,879 INFO L226 Difference]: Without dead ends: 79 [2021-05-03 14:09:13,879 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 205.8ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:09:13,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-05-03 14:09:13,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 67. [2021-05-03 14:09:13,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 2.515151515151515) internal successors, (166), 66 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:13,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 166 transitions. [2021-05-03 14:09:13,883 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 166 transitions. Word has length 15 [2021-05-03 14:09:13,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:13,883 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 166 transitions. [2021-05-03 14:09:13,883 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:13,883 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 166 transitions. [2021-05-03 14:09:13,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:09:13,883 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:13,884 INFO L551 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:14,099 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:14,099 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:14,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:14,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1028947268, now seen corresponding path program 15 times [2021-05-03 14:09:14,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:14,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302022257] [2021-05-03 14:09:14,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:14,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:14,167 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:14,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302022257] [2021-05-03 14:09:14,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015121092] [2021-05-03 14:09:14,167 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:14,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:09:14,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:14,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 14:09:14,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:14,420 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:14,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-05-03 14:09:14,519 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-05-03 14:09:14,523 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-05-03 14:09:14,523 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:09:14,525 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-05-03 14:09:14,526 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:09:14,557 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:14,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-05-03 14:09:14,573 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:09:14,587 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-05-03 14:09:14,587 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:09:14,587 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-05-03 14:09:14,611 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:14,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:14,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-03 14:09:14,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780352840] [2021-05-03 14:09:14,612 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:09:14,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:14,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:09:14,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:09:14,612 INFO L87 Difference]: Start difference. First operand 67 states and 166 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:14,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:14,895 INFO L93 Difference]: Finished difference Result 119 states and 261 transitions. [2021-05-03 14:09:14,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:09:14,896 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) 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 15 [2021-05-03 14:09:14,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:14,896 INFO L225 Difference]: With dead ends: 119 [2021-05-03 14:09:14,896 INFO L226 Difference]: Without dead ends: 102 [2021-05-03 14:09:14,898 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 229.4ms TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:09:14,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-05-03 14:09:14,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 67. [2021-05-03 14:09:14,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 2.5) internal successors, (165), 66 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:14,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 165 transitions. [2021-05-03 14:09:14,909 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 165 transitions. Word has length 15 [2021-05-03 14:09:14,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:14,909 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 165 transitions. [2021-05-03 14:09:14,910 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:14,910 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 165 transitions. [2021-05-03 14:09:14,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:09:14,910 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:14,910 INFO L551 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:15,125 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:15,125 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:15,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:15,125 INFO L82 PathProgramCache]: Analyzing trace with hash 681666040, now seen corresponding path program 16 times [2021-05-03 14:09:15,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:15,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871635466] [2021-05-03 14:09:15,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:15,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:15,243 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:15,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871635466] [2021-05-03 14:09:15,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867751567] [2021-05-03 14:09:15,243 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:15,272 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:09:15,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:15,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 14:09:15,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:15,506 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:15,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-05-03 14:09:15,589 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-05-03 14:09:15,597 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-05-03 14:09:15,598 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:09:15,600 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-05-03 14:09:15,600 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:09:15,618 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:15,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-05-03 14:09:15,666 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:09:15,680 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-05-03 14:09:15,680 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:09:15,681 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-05-03 14:09:15,704 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:15,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:15,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-03 14:09:15,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565989567] [2021-05-03 14:09:15,705 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:09:15,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:15,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:09:15,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:09:15,705 INFO L87 Difference]: Start difference. First operand 67 states and 165 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:15,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:15,930 INFO L93 Difference]: Finished difference Result 98 states and 230 transitions. [2021-05-03 14:09:15,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:09:15,930 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) 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 15 [2021-05-03 14:09:15,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:15,931 INFO L225 Difference]: With dead ends: 98 [2021-05-03 14:09:15,931 INFO L226 Difference]: Without dead ends: 93 [2021-05-03 14:09:15,931 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 269.3ms TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:09:15,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-05-03 14:09:15,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 67. [2021-05-03 14:09:15,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 2.5) internal successors, (165), 66 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:15,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 165 transitions. [2021-05-03 14:09:15,933 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 165 transitions. Word has length 15 [2021-05-03 14:09:15,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:15,933 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 165 transitions. [2021-05-03 14:09:15,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:15,933 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 165 transitions. [2021-05-03 14:09:15,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:09:15,933 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:15,934 INFO L551 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:16,148 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:16,148 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:16,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:16,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1268567164, now seen corresponding path program 17 times [2021-05-03 14:09:16,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:16,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516881123] [2021-05-03 14:09:16,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:16,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:16,221 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:16,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516881123] [2021-05-03 14:09:16,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010664745] [2021-05-03 14:09:16,221 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:09:16,239 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:09:16,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:16,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 14:09:16,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:16,384 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:16,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-05-03 14:09:16,404 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:09:16,405 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:16,406 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:09:16,406 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-05-03 14:09:16,410 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:16,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:16,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-03 14:09:16,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818571322] [2021-05-03 14:09:16,412 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:09:16,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:16,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:09:16,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:09:16,413 INFO L87 Difference]: Start difference. First operand 67 states and 165 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:16,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:16,621 INFO L93 Difference]: Finished difference Result 100 states and 238 transitions. [2021-05-03 14:09:16,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:09:16,622 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) 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 15 [2021-05-03 14:09:16,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:16,622 INFO L225 Difference]: With dead ends: 100 [2021-05-03 14:09:16,622 INFO L226 Difference]: Without dead ends: 86 [2021-05-03 14:09:16,622 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 176.2ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:09:16,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-05-03 14:09:16,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 76. [2021-05-03 14:09:16,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.6266666666666665) internal successors, (197), 75 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:16,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 197 transitions. [2021-05-03 14:09:16,634 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 197 transitions. Word has length 15 [2021-05-03 14:09:16,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:16,634 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 197 transitions. [2021-05-03 14:09:16,634 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:16,634 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 197 transitions. [2021-05-03 14:09:16,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:09:16,637 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:16,637 INFO L551 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:16,852 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:16,852 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:16,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:16,852 INFO L82 PathProgramCache]: Analyzing trace with hash -409692634, now seen corresponding path program 18 times [2021-05-03 14:09:16,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:16,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121058294] [2021-05-03 14:09:16,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:16,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:16,923 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:16,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121058294] [2021-05-03 14:09:16,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456679987] [2021-05-03 14:09:16,924 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:09:16,943 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 14:09:16,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:16,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 14:09:16,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:17,161 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2021-05-03 14:09:17,489 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2021-05-03 14:09:17,781 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2021-05-03 14:09:18,085 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2021-05-03 14:09:18,843 WARN L205 SmtUtils]: Spent 357.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-03 14:09:18,844 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:18,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-05-03 14:09:18,886 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-05-03 14:09:18,890 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-05-03 14:09:18,890 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:09:18,892 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-05-03 14:09:18,893 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:09:18,911 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:18,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-05-03 14:09:18,930 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:09:18,963 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-05-03 14:09:18,963 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:09:18,963 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-05-03 14:09:18,988 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:18,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:18,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-03 14:09:18,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358990015] [2021-05-03 14:09:18,989 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:09:18,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:18,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:09:18,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:09:18,989 INFO L87 Difference]: Start difference. First operand 76 states and 197 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:19,265 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2021-05-03 14:09:19,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:19,371 INFO L93 Difference]: Finished difference Result 120 states and 281 transitions. [2021-05-03 14:09:19,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:09:19,371 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) 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 15 [2021-05-03 14:09:19,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:19,372 INFO L225 Difference]: With dead ends: 120 [2021-05-03 14:09:19,372 INFO L226 Difference]: Without dead ends: 110 [2021-05-03 14:09:19,372 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1215.3ms TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:09:19,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-05-03 14:09:19,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 76. [2021-05-03 14:09:19,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.6266666666666665) internal successors, (197), 75 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:19,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 197 transitions. [2021-05-03 14:09:19,374 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 197 transitions. Word has length 15 [2021-05-03 14:09:19,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:19,374 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 197 transitions. [2021-05-03 14:09:19,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:19,374 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 197 transitions. [2021-05-03 14:09:19,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:09:19,374 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:19,374 INFO L551 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:19,584 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:19,585 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:19,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:19,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1300920674, now seen corresponding path program 19 times [2021-05-03 14:09:19,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:19,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318894049] [2021-05-03 14:09:19,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:19,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:19,692 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:19,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318894049] [2021-05-03 14:09:19,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558817527] [2021-05-03 14:09:19,693 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:19,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:19,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 14:09:19,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:19,927 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:19,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-05-03 14:09:19,985 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-05-03 14:09:19,987 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-05-03 14:09:19,988 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:09:19,990 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-05-03 14:09:19,990 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:09:20,008 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:20,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-05-03 14:09:20,041 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:09:20,055 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-05-03 14:09:20,055 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:09:20,056 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-05-03 14:09:20,078 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:20,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:20,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-03 14:09:20,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622289155] [2021-05-03 14:09:20,080 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:09:20,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:20,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:09:20,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:09:20,080 INFO L87 Difference]: Start difference. First operand 76 states and 197 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:20,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:20,361 INFO L93 Difference]: Finished difference Result 104 states and 252 transitions. [2021-05-03 14:09:20,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:09:20,362 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) 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 15 [2021-05-03 14:09:20,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:20,362 INFO L225 Difference]: With dead ends: 104 [2021-05-03 14:09:20,362 INFO L226 Difference]: Without dead ends: 99 [2021-05-03 14:09:20,363 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 308.7ms TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:09:20,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-05-03 14:09:20,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 76. [2021-05-03 14:09:20,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.6266666666666665) internal successors, (197), 75 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:20,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 197 transitions. [2021-05-03 14:09:20,365 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 197 transitions. Word has length 15 [2021-05-03 14:09:20,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:20,365 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 197 transitions. [2021-05-03 14:09:20,366 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:20,366 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 197 transitions. [2021-05-03 14:09:20,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:09:20,366 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:20,366 INFO L551 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:20,580 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable273 [2021-05-03 14:09:20,581 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:20,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:20,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1504641626, now seen corresponding path program 20 times [2021-05-03 14:09:20,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:20,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445403404] [2021-05-03 14:09:20,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:20,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:20,644 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:20,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445403404] [2021-05-03 14:09:20,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439536139] [2021-05-03 14:09:20,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:20,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:09:20,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:20,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 14:09:20,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:20,874 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:20,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-05-03 14:09:20,919 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-05-03 14:09:20,921 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-05-03 14:09:20,922 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:09:20,924 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-05-03 14:09:20,925 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:09:20,943 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:20,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-05-03 14:09:20,960 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:09:20,973 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-05-03 14:09:20,974 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:09:20,974 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-05-03 14:09:21,002 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:21,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:21,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-03 14:09:21,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006002073] [2021-05-03 14:09:21,003 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:09:21,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:21,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:09:21,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:09:21,004 INFO L87 Difference]: Start difference. First operand 76 states and 197 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:21,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:21,320 INFO L93 Difference]: Finished difference Result 121 states and 292 transitions. [2021-05-03 14:09:21,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:09:21,320 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) 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 15 [2021-05-03 14:09:21,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:21,321 INFO L225 Difference]: With dead ends: 121 [2021-05-03 14:09:21,321 INFO L226 Difference]: Without dead ends: 116 [2021-05-03 14:09:21,321 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 304.6ms TimeCoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:09:21,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-05-03 14:09:21,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 76. [2021-05-03 14:09:21,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.6266666666666665) internal successors, (197), 75 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:21,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 197 transitions. [2021-05-03 14:09:21,323 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 197 transitions. Word has length 15 [2021-05-03 14:09:21,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:21,323 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 197 transitions. [2021-05-03 14:09:21,323 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:21,323 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 197 transitions. [2021-05-03 14:09:21,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:09:21,323 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:21,323 INFO L551 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:21,537 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable307,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:21,537 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:21,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:21,537 INFO L82 PathProgramCache]: Analyzing trace with hash 748457306, now seen corresponding path program 21 times [2021-05-03 14:09:21,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:21,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416314153] [2021-05-03 14:09:21,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:21,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:21,596 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:21,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416314153] [2021-05-03 14:09:21,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141368829] [2021-05-03 14:09:21,596 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:21,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:09:21,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:21,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 14:09:21,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:21,750 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:21,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-05-03 14:09:21,764 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:09:21,765 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:21,766 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:09:21,766 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-05-03 14:09:21,770 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:21,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:21,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-03 14:09:21,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168248328] [2021-05-03 14:09:21,771 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:09:21,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:21,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:09:21,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:09:21,772 INFO L87 Difference]: Start difference. First operand 76 states and 197 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:21,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:21,928 INFO L93 Difference]: Finished difference Result 107 states and 266 transitions. [2021-05-03 14:09:21,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:09:21,928 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) 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 15 [2021-05-03 14:09:21,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:21,928 INFO L225 Difference]: With dead ends: 107 [2021-05-03 14:09:21,929 INFO L226 Difference]: Without dead ends: 93 [2021-05-03 14:09:21,929 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 155.0ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:09:21,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-05-03 14:09:21,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 85. [2021-05-03 14:09:21,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.7142857142857144) internal successors, (228), 84 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:21,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 228 transitions. [2021-05-03 14:09:21,931 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 228 transitions. Word has length 15 [2021-05-03 14:09:21,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:21,931 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 228 transitions. [2021-05-03 14:09:21,931 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:21,931 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 228 transitions. [2021-05-03 14:09:21,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:09:21,931 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:21,931 INFO L551 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:22,148 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:22,149 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:22,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:22,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1607331836, now seen corresponding path program 22 times [2021-05-03 14:09:22,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:22,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046699883] [2021-05-03 14:09:22,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:22,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:22,300 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:22,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046699883] [2021-05-03 14:09:22,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177790568] [2021-05-03 14:09:22,300 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:22,319 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:09:22,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:22,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 14:09:22,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:22,747 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:22,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-05-03 14:09:22,783 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-05-03 14:09:22,786 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-05-03 14:09:22,787 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:09:22,788 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-05-03 14:09:22,789 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:09:22,806 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:22,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-05-03 14:09:22,820 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:09:22,832 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-05-03 14:09:22,833 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:09:22,833 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-05-03 14:09:22,862 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:22,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:22,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-03 14:09:22,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384320603] [2021-05-03 14:09:22,863 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:09:22,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:22,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:09:22,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:09:22,863 INFO L87 Difference]: Start difference. First operand 85 states and 228 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:23,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:23,147 INFO L93 Difference]: Finished difference Result 129 states and 314 transitions. [2021-05-03 14:09:23,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:09:23,147 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) 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 15 [2021-05-03 14:09:23,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:23,148 INFO L225 Difference]: With dead ends: 129 [2021-05-03 14:09:23,148 INFO L226 Difference]: Without dead ends: 119 [2021-05-03 14:09:23,148 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 398.9ms TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:09:23,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-05-03 14:09:23,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 85. [2021-05-03 14:09:23,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.7142857142857144) internal successors, (228), 84 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:23,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 228 transitions. [2021-05-03 14:09:23,150 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 228 transitions. Word has length 15 [2021-05-03 14:09:23,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:23,150 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 228 transitions. [2021-05-03 14:09:23,150 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:23,150 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 228 transitions. [2021-05-03 14:09:23,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:09:23,150 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:23,150 INFO L551 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:23,352 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable364 [2021-05-03 14:09:23,353 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:23,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:23,353 INFO L82 PathProgramCache]: Analyzing trace with hash -977022152, now seen corresponding path program 23 times [2021-05-03 14:09:23,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:23,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532933631] [2021-05-03 14:09:23,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:23,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:23,459 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:23,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532933631] [2021-05-03 14:09:23,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672659019] [2021-05-03 14:09:23,459 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:23,476 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:09:23,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:23,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 14:09:23,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:24,151 WARN L205 SmtUtils]: Spent 584.00 ms on a formula simplification. DAG size of input: 2608 DAG size of output: 46 [2021-05-03 14:09:24,243 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:24,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-05-03 14:09:24,295 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-05-03 14:09:24,298 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-05-03 14:09:24,298 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:09:24,300 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-05-03 14:09:24,301 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:09:24,317 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:24,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-05-03 14:09:24,335 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:09:24,348 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-05-03 14:09:24,349 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:09:24,349 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-05-03 14:09:24,374 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:24,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:24,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-03 14:09:24,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102990994] [2021-05-03 14:09:24,374 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:09:24,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:24,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:09:24,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:09:24,375 INFO L87 Difference]: Start difference. First operand 85 states and 228 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:24,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:24,582 INFO L93 Difference]: Finished difference Result 111 states and 280 transitions. [2021-05-03 14:09:24,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:09:24,582 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) 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 15 [2021-05-03 14:09:24,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:24,582 INFO L225 Difference]: With dead ends: 111 [2021-05-03 14:09:24,582 INFO L226 Difference]: Without dead ends: 106 [2021-05-03 14:09:24,583 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 254.8ms TimeCoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:09:24,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-05-03 14:09:24,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 85. [2021-05-03 14:09:24,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.7142857142857144) internal successors, (228), 84 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:24,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 228 transitions. [2021-05-03 14:09:24,584 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 228 transitions. Word has length 15 [2021-05-03 14:09:24,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:24,584 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 228 transitions. [2021-05-03 14:09:24,585 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:24,585 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 228 transitions. [2021-05-03 14:09:24,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:09:24,585 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:24,585 INFO L551 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:24,793 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable409,37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:24,793 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:24,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:24,793 INFO L82 PathProgramCache]: Analyzing trace with hash 512382844, now seen corresponding path program 24 times [2021-05-03 14:09:24,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:24,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340860125] [2021-05-03 14:09:24,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:24,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:24,921 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:24,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340860125] [2021-05-03 14:09:24,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104900696] [2021-05-03 14:09:24,922 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 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 [2021-05-03 14:09:24,944 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 14:09:24,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:24,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 14:09:24,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:25,144 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:25,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-05-03 14:09:25,175 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-05-03 14:09:25,178 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-05-03 14:09:25,178 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:09:25,180 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-05-03 14:09:25,181 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:09:25,199 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:25,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-05-03 14:09:25,213 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:09:25,227 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-05-03 14:09:25,228 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:09:25,228 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-05-03 14:09:25,251 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:25,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:25,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-03 14:09:25,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518990542] [2021-05-03 14:09:25,252 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:09:25,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:25,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:09:25,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:09:25,252 INFO L87 Difference]: Start difference. First operand 85 states and 228 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:25,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:25,550 INFO L93 Difference]: Finished difference Result 125 states and 307 transitions. [2021-05-03 14:09:25,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:09:25,551 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) 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 15 [2021-05-03 14:09:25,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:25,551 INFO L225 Difference]: With dead ends: 125 [2021-05-03 14:09:25,551 INFO L226 Difference]: Without dead ends: 120 [2021-05-03 14:09:25,551 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 348.7ms TimeCoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:09:25,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-05-03 14:09:25,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 85. [2021-05-03 14:09:25,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.7142857142857144) internal successors, (228), 84 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:25,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 228 transitions. [2021-05-03 14:09:25,553 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 228 transitions. Word has length 15 [2021-05-03 14:09:25,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:25,553 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 228 transitions. [2021-05-03 14:09:25,553 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:25,553 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 228 transitions. [2021-05-03 14:09:25,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:09:25,554 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:25,554 INFO L551 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:25,760 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable454 [2021-05-03 14:09:25,761 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:25,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:25,761 INFO L82 PathProgramCache]: Analyzing trace with hash -560702536, now seen corresponding path program 25 times [2021-05-03 14:09:25,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:25,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499258053] [2021-05-03 14:09:25,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:25,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:25,819 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:25,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499258053] [2021-05-03 14:09:25,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504146447] [2021-05-03 14:09:25,819 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:09:25,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:25,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 14:09:25,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:26,037 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:26,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-05-03 14:09:26,077 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-05-03 14:09:26,079 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-05-03 14:09:26,079 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:09:26,081 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-05-03 14:09:26,082 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:09:26,100 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:26,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-05-03 14:09:26,114 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:09:26,127 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-05-03 14:09:26,128 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:09:26,128 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-05-03 14:09:26,150 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:26,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:26,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-03 14:09:26,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807913871] [2021-05-03 14:09:26,151 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:09:26,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:26,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:09:26,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:09:26,151 INFO L87 Difference]: Start difference. First operand 85 states and 228 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:26,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:26,498 INFO L93 Difference]: Finished difference Result 139 states and 341 transitions. [2021-05-03 14:09:26,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:09:26,499 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) 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 15 [2021-05-03 14:09:26,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:26,499 INFO L225 Difference]: With dead ends: 139 [2021-05-03 14:09:26,499 INFO L226 Difference]: Without dead ends: 134 [2021-05-03 14:09:26,500 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 339.2ms TimeCoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:09:26,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-05-03 14:09:26,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 85. [2021-05-03 14:09:26,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.7142857142857144) internal successors, (228), 84 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:26,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 228 transitions. [2021-05-03 14:09:26,501 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 228 transitions. Word has length 15 [2021-05-03 14:09:26,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:26,501 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 228 transitions. [2021-05-03 14:09:26,502 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:26,502 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 228 transitions. [2021-05-03 14:09:26,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:09:26,502 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:26,502 INFO L551 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:26,716 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable489,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:26,716 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:26,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:26,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1148293564, now seen corresponding path program 26 times [2021-05-03 14:09:26,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:26,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258603564] [2021-05-03 14:09:26,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:26,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:26,776 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:26,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258603564] [2021-05-03 14:09:26,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269542290] [2021-05-03 14:09:26,777 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:26,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:09:26,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:26,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 14:09:26,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:26,962 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:26,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-05-03 14:09:26,983 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:09:26,984 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:26,985 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:09:26,985 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-05-03 14:09:26,989 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:26,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:26,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-03 14:09:26,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15592523] [2021-05-03 14:09:26,989 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:09:26,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:26,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:09:26,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:09:26,990 INFO L87 Difference]: Start difference. First operand 85 states and 228 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:27,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:27,173 INFO L93 Difference]: Finished difference Result 117 states and 300 transitions. [2021-05-03 14:09:27,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:09:27,173 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) 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 15 [2021-05-03 14:09:27,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:27,174 INFO L225 Difference]: With dead ends: 117 [2021-05-03 14:09:27,174 INFO L226 Difference]: Without dead ends: 103 [2021-05-03 14:09:27,174 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 162.8ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:09:27,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-05-03 14:09:27,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 94. [2021-05-03 14:09:27,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.78494623655914) internal successors, (259), 93 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) [2021-05-03 14:09:27,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 259 transitions. [2021-05-03 14:09:27,176 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 259 transitions. Word has length 15 [2021-05-03 14:09:27,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:27,177 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 259 transitions. [2021-05-03 14:09:27,177 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:27,177 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 259 transitions. [2021-05-03 14:09:27,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:09:27,177 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:27,178 INFO L551 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:27,392 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable526,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:27,392 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:27,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:27,393 INFO L82 PathProgramCache]: Analyzing trace with hash -289419034, now seen corresponding path program 27 times [2021-05-03 14:09:27,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:27,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147765749] [2021-05-03 14:09:27,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:27,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:27,453 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:27,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147765749] [2021-05-03 14:09:27,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423176285] [2021-05-03 14:09:27,453 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:27,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:09:27,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:27,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 14:09:27,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:27,660 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:27,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-05-03 14:09:27,706 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-05-03 14:09:27,708 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-05-03 14:09:27,708 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:09:27,710 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-05-03 14:09:27,711 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:09:27,727 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:27,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-05-03 14:09:27,741 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:09:27,755 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-05-03 14:09:27,755 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:09:27,755 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-05-03 14:09:27,782 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:27,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:27,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-03 14:09:27,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126066135] [2021-05-03 14:09:27,783 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:09:27,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:27,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:09:27,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:09:27,783 INFO L87 Difference]: Start difference. First operand 94 states and 259 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:28,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:28,079 INFO L93 Difference]: Finished difference Result 141 states and 356 transitions. [2021-05-03 14:09:28,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:09:28,080 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) 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 15 [2021-05-03 14:09:28,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:28,080 INFO L225 Difference]: With dead ends: 141 [2021-05-03 14:09:28,080 INFO L226 Difference]: Without dead ends: 131 [2021-05-03 14:09:28,081 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 221.5ms TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:09:28,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-05-03 14:09:28,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 94. [2021-05-03 14:09:28,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.78494623655914) internal successors, (259), 93 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) [2021-05-03 14:09:28,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 259 transitions. [2021-05-03 14:09:28,082 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 259 transitions. Word has length 15 [2021-05-03 14:09:28,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:28,083 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 259 transitions. [2021-05-03 14:09:28,083 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:28,083 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 259 transitions. [2021-05-03 14:09:28,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:09:28,083 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:28,083 INFO L551 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:28,296 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable543 [2021-05-03 14:09:28,297 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:28,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:28,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1421194274, now seen corresponding path program 28 times [2021-05-03 14:09:28,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:28,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732957293] [2021-05-03 14:09:28,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:28,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:28,352 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:28,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732957293] [2021-05-03 14:09:28,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119702338] [2021-05-03 14:09:28,352 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:28,385 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:09:28,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:28,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 14:09:28,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:28,598 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:28,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-05-03 14:09:28,637 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-05-03 14:09:28,639 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-05-03 14:09:28,640 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:09:28,642 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-05-03 14:09:28,643 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:09:28,662 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:28,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-05-03 14:09:28,677 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:09:28,690 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-05-03 14:09:28,690 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:09:28,690 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-05-03 14:09:28,713 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:28,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:28,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-03 14:09:28,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558287066] [2021-05-03 14:09:28,714 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:09:28,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:28,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:09:28,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:09:28,714 INFO L87 Difference]: Start difference. First operand 94 states and 259 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:28,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:28,892 INFO L93 Difference]: Finished difference Result 128 states and 330 transitions. [2021-05-03 14:09:28,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:09:28,892 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) 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 15 [2021-05-03 14:09:28,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:28,893 INFO L225 Difference]: With dead ends: 128 [2021-05-03 14:09:28,893 INFO L226 Difference]: Without dead ends: 123 [2021-05-03 14:09:28,893 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 238.1ms TimeCoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:09:28,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-05-03 14:09:28,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 94. [2021-05-03 14:09:28,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.78494623655914) internal successors, (259), 93 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) [2021-05-03 14:09:28,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 259 transitions. [2021-05-03 14:09:28,895 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 259 transitions. Word has length 15 [2021-05-03 14:09:28,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:28,895 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 259 transitions. [2021-05-03 14:09:28,895 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:28,895 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 259 transitions. [2021-05-03 14:09:28,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:09:28,895 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:28,895 INFO L551 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:29,104 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable598 [2021-05-03 14:09:29,105 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:29,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:29,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1384368026, now seen corresponding path program 29 times [2021-05-03 14:09:29,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:29,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714351404] [2021-05-03 14:09:29,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:29,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:29,162 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:29,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714351404] [2021-05-03 14:09:29,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871841976] [2021-05-03 14:09:29,163 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:09:29,193 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:09:29,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:29,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 14:09:29,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:29,344 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:29,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-05-03 14:09:29,373 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-05-03 14:09:29,375 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-05-03 14:09:29,376 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:09:29,377 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-05-03 14:09:29,378 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:09:29,395 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:29,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-05-03 14:09:29,412 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:09:29,426 INFO L628 ElimStorePlain]: treesize reduction 20, result has 42.9 percent of original size [2021-05-03 14:09:29,426 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:09:29,427 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-05-03 14:09:29,450 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:29,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:29,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-03 14:09:29,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650688483] [2021-05-03 14:09:29,450 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:09:29,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:29,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:09:29,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:09:29,451 INFO L87 Difference]: Start difference. First operand 94 states and 259 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:29,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:29,707 INFO L93 Difference]: Finished difference Result 142 states and 360 transitions. [2021-05-03 14:09:29,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:09:29,707 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) 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 15 [2021-05-03 14:09:29,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:29,708 INFO L225 Difference]: With dead ends: 142 [2021-05-03 14:09:29,708 INFO L226 Difference]: Without dead ends: 137 [2021-05-03 14:09:29,708 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 280.5ms TimeCoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:09:29,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-05-03 14:09:29,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 94. [2021-05-03 14:09:29,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.78494623655914) internal successors, (259), 93 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) [2021-05-03 14:09:29,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 259 transitions. [2021-05-03 14:09:29,710 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 259 transitions. Word has length 15 [2021-05-03 14:09:29,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:29,710 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 259 transitions. [2021-05-03 14:09:29,710 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:29,710 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 259 transitions. [2021-05-03 14:09:29,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:09:29,710 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:29,710 INFO L551 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:29,923 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable633,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:29,924 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:29,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:29,924 INFO L82 PathProgramCache]: Analyzing trace with hash 1837513890, now seen corresponding path program 30 times [2021-05-03 14:09:29,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:29,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581301146] [2021-05-03 14:09:29,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:29,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:29,981 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:29,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581301146] [2021-05-03 14:09:29,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370731524] [2021-05-03 14:09:29,982 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:29,999 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 14:09:29,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:30,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 14:09:30,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:30,196 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:30,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-05-03 14:09:30,227 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-05-03 14:09:30,229 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-05-03 14:09:30,230 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:09:30,232 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-05-03 14:09:30,233 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:09:30,249 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:30,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-05-03 14:09:30,260 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:09:30,273 INFO L628 ElimStorePlain]: treesize reduction 20, result has 42.9 percent of original size [2021-05-03 14:09:30,274 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:09:30,274 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-05-03 14:09:30,295 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:30,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:30,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-03 14:09:30,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053930305] [2021-05-03 14:09:30,295 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:09:30,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:30,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:09:30,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:09:30,296 INFO L87 Difference]: Start difference. First operand 94 states and 259 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:30,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:30,630 INFO L93 Difference]: Finished difference Result 154 states and 387 transitions. [2021-05-03 14:09:30,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:09:30,631 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) 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 15 [2021-05-03 14:09:30,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:30,631 INFO L225 Difference]: With dead ends: 154 [2021-05-03 14:09:30,631 INFO L226 Difference]: Without dead ends: 149 [2021-05-03 14:09:30,631 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 354.9ms TimeCoverageRelationStatistics Valid=136, Invalid=620, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:09:30,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-05-03 14:09:30,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 94. [2021-05-03 14:09:30,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.78494623655914) internal successors, (259), 93 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) [2021-05-03 14:09:30,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 259 transitions. [2021-05-03 14:09:30,633 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 259 transitions. Word has length 15 [2021-05-03 14:09:30,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:30,633 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 259 transitions. [2021-05-03 14:09:30,633 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:30,633 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 259 transitions. [2021-05-03 14:09:30,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:09:30,634 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:30,634 INFO L551 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:30,848 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable671,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:30,848 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:30,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:30,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1363361818, now seen corresponding path program 31 times [2021-05-03 14:09:30,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:30,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966989921] [2021-05-03 14:09:30,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:30,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:30,903 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:30,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966989921] [2021-05-03 14:09:30,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676915022] [2021-05-03 14:09:30,904 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:30,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:30,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 14:09:30,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:31,111 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:31,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-05-03 14:09:31,157 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-05-03 14:09:31,159 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-05-03 14:09:31,160 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:09:31,161 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-05-03 14:09:31,162 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:09:31,180 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:31,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-05-03 14:09:31,194 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:09:31,207 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-05-03 14:09:31,208 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:09:31,208 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-05-03 14:09:31,233 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:31,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:31,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-03 14:09:31,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409825478] [2021-05-03 14:09:31,234 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:09:31,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:31,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:09:31,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:09:31,234 INFO L87 Difference]: Start difference. First operand 94 states and 259 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:31,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:31,589 INFO L93 Difference]: Finished difference Result 159 states and 400 transitions. [2021-05-03 14:09:31,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:09:31,589 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) 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 15 [2021-05-03 14:09:31,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:31,590 INFO L225 Difference]: With dead ends: 159 [2021-05-03 14:09:31,590 INFO L226 Difference]: Without dead ends: 154 [2021-05-03 14:09:31,590 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 397.6ms TimeCoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:09:31,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-05-03 14:09:31,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 96. [2021-05-03 14:09:31,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.7578947368421054) internal successors, (262), 95 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:31,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 262 transitions. [2021-05-03 14:09:31,592 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 262 transitions. Word has length 15 [2021-05-03 14:09:31,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:31,592 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 262 transitions. [2021-05-03 14:09:31,592 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:31,592 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 262 transitions. [2021-05-03 14:09:31,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:09:31,592 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:31,593 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:31,805 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable707,45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:31,805 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:31,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:31,805 INFO L82 PathProgramCache]: Analyzing trace with hash 2020244300, now seen corresponding path program 32 times [2021-05-03 14:09:31,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:31,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849515540] [2021-05-03 14:09:31,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:31,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:31,882 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:31,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849515540] [2021-05-03 14:09:31,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790010742] [2021-05-03 14:09:31,882 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:09:31,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:09:31,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:31,906 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-03 14:09:31,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:32,083 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:32,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-05-03 14:09:32,121 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:09:32,122 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:32,123 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:09:32,123 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-05-03 14:09:32,128 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:32,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:32,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-03 14:09:32,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281291516] [2021-05-03 14:09:32,128 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:09:32,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:32,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:09:32,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:09:32,129 INFO L87 Difference]: Start difference. First operand 96 states and 262 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:32,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:32,343 INFO L93 Difference]: Finished difference Result 123 states and 314 transitions. [2021-05-03 14:09:32,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:09:32,344 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:09:32,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:32,344 INFO L225 Difference]: With dead ends: 123 [2021-05-03 14:09:32,344 INFO L226 Difference]: Without dead ends: 109 [2021-05-03 14:09:32,344 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 211.2ms TimeCoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:09:32,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-05-03 14:09:32,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 99. [2021-05-03 14:09:32,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.7346938775510203) internal successors, (268), 98 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:32,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 268 transitions. [2021-05-03 14:09:32,346 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 268 transitions. Word has length 16 [2021-05-03 14:09:32,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:32,346 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 268 transitions. [2021-05-03 14:09:32,346 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:32,346 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 268 transitions. [2021-05-03 14:09:32,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:09:32,346 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:32,346 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:32,549 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable751 [2021-05-03 14:09:32,549 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:32,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:32,549 INFO L82 PathProgramCache]: Analyzing trace with hash 353840502, now seen corresponding path program 33 times [2021-05-03 14:09:32,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:32,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334919926] [2021-05-03 14:09:32,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:32,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:32,699 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:32,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334919926] [2021-05-03 14:09:32,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007728157] [2021-05-03 14:09:32,699 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:32,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:09:32,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:32,718 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-03 14:09:32,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:32,909 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:32,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-05-03 14:09:32,944 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:09:32,945 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:32,946 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:09:32,946 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-05-03 14:09:32,951 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:32,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:32,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-03 14:09:32,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586151478] [2021-05-03 14:09:32,951 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:09:32,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:32,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:09:32,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:09:32,952 INFO L87 Difference]: Start difference. First operand 99 states and 268 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:33,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:33,296 INFO L93 Difference]: Finished difference Result 118 states and 307 transitions. [2021-05-03 14:09:33,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:09:33,297 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:09:33,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:33,297 INFO L225 Difference]: With dead ends: 118 [2021-05-03 14:09:33,297 INFO L226 Difference]: Without dead ends: 109 [2021-05-03 14:09:33,298 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 355.4ms TimeCoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:09:33,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-05-03 14:09:33,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 100. [2021-05-03 14:09:33,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.727272727272727) internal successors, (270), 99 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:33,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 270 transitions. [2021-05-03 14:09:33,299 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 270 transitions. Word has length 16 [2021-05-03 14:09:33,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:33,299 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 270 transitions. [2021-05-03 14:09:33,299 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:33,300 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 270 transitions. [2021-05-03 14:09:33,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:09:33,300 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:33,300 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:33,515 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable773 [2021-05-03 14:09:33,515 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:33,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:33,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1212715032, now seen corresponding path program 34 times [2021-05-03 14:09:33,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:33,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551805472] [2021-05-03 14:09:33,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:33,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:33,618 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:33,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551805472] [2021-05-03 14:09:33,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52993926] [2021-05-03 14:09:33,618 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:33,634 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:09:33,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:33,635 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-03 14:09:33,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:33,802 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:33,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-05-03 14:09:33,835 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:09:33,893 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:33,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-05-03 14:09:33,965 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-05-03 14:09:34,038 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:34,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-05-03 14:09:34,267 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-05-03 14:09:34,297 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-05-03 14:09:34,297 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:09:34,297 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-05-03 14:09:34,336 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:34,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:34,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-03 14:09:34,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575852929] [2021-05-03 14:09:34,337 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:09:34,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:34,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:09:34,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:09:34,338 INFO L87 Difference]: Start difference. First operand 100 states and 270 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:34,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:34,581 INFO L93 Difference]: Finished difference Result 140 states and 346 transitions. [2021-05-03 14:09:34,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:09:34,582 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:09:34,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:34,582 INFO L225 Difference]: With dead ends: 140 [2021-05-03 14:09:34,582 INFO L226 Difference]: Without dead ends: 130 [2021-05-03 14:09:34,582 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 255.5ms TimeCoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:09:34,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-05-03 14:09:34,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 100. [2021-05-03 14:09:34,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.727272727272727) internal successors, (270), 99 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:34,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 270 transitions. [2021-05-03 14:09:34,584 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 270 transitions. Word has length 16 [2021-05-03 14:09:34,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:34,584 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 270 transitions. [2021-05-03 14:09:34,584 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:34,584 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 270 transitions. [2021-05-03 14:09:34,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:09:34,585 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:34,585 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:34,799 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable797,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:34,799 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:34,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:34,800 INFO L82 PathProgramCache]: Analyzing trace with hash 865094314, now seen corresponding path program 35 times [2021-05-03 14:09:34,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:34,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359142489] [2021-05-03 14:09:34,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:34,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:34,870 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:34,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359142489] [2021-05-03 14:09:34,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130540738] [2021-05-03 14:09:34,870 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:34,889 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:09:34,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:34,890 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-03 14:09:34,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:35,069 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:35,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-05-03 14:09:35,106 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:09:35,166 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:35,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-05-03 14:09:35,245 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-05-03 14:09:35,313 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:35,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-05-03 14:09:35,734 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-05-03 14:09:35,755 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-05-03 14:09:35,756 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:09:35,756 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-05-03 14:09:35,784 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:35,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:35,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-05-03 14:09:35,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868731954] [2021-05-03 14:09:35,784 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:09:35,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:35,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:09:35,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:09:35,785 INFO L87 Difference]: Start difference. First operand 100 states and 270 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:36,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:36,135 INFO L93 Difference]: Finished difference Result 156 states and 373 transitions. [2021-05-03 14:09:36,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 14:09:36,135 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:09:36,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:36,136 INFO L225 Difference]: With dead ends: 156 [2021-05-03 14:09:36,136 INFO L226 Difference]: Without dead ends: 146 [2021-05-03 14:09:36,136 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 283.1ms TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:09:36,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-05-03 14:09:36,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 103. [2021-05-03 14:09:36,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.7254901960784315) internal successors, (278), 102 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:36,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 278 transitions. [2021-05-03 14:09:36,138 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 278 transitions. Word has length 16 [2021-05-03 14:09:36,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:36,138 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 278 transitions. [2021-05-03 14:09:36,138 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:36,138 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 278 transitions. [2021-05-03 14:09:36,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:09:36,138 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:36,138 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:36,339 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable984 [2021-05-03 14:09:36,339 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:36,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:36,352 INFO L82 PathProgramCache]: Analyzing trace with hash -770929815, now seen corresponding path program 36 times [2021-05-03 14:09:36,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:36,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253947827] [2021-05-03 14:09:36,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:36,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:36,398 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:36,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253947827] [2021-05-03 14:09:36,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602509636] [2021-05-03 14:09:36,398 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:36,441 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 14:09:36,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:36,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 14:09:36,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:36,468 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:36,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:36,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-05-03 14:09:36,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812181685] [2021-05-03 14:09:36,468 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 14:09:36,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:36,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 14:09:36,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:09:36,468 INFO L87 Difference]: Start difference. First operand 103 states and 278 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:36,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:36,523 INFO L93 Difference]: Finished difference Result 216 states and 471 transitions. [2021-05-03 14:09:36,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 14:09:36,523 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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 16 [2021-05-03 14:09:36,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:36,524 INFO L225 Difference]: With dead ends: 216 [2021-05-03 14:09:36,524 INFO L226 Difference]: Without dead ends: 216 [2021-05-03 14:09:36,524 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 30.6ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:09:36,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-05-03 14:09:36,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 109. [2021-05-03 14:09:36,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.787037037037037) internal successors, (301), 108 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:36,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 301 transitions. [2021-05-03 14:09:36,526 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 301 transitions. Word has length 16 [2021-05-03 14:09:36,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:36,526 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 301 transitions. [2021-05-03 14:09:36,526 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:36,526 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 301 transitions. [2021-05-03 14:09:36,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:09:36,526 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:36,527 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:36,741 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1289 [2021-05-03 14:09:36,741 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:36,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:36,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1085138890, now seen corresponding path program 37 times [2021-05-03 14:09:36,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:36,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366442874] [2021-05-03 14:09:36,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:36,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:36,919 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:36,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366442874] [2021-05-03 14:09:36,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761850000] [2021-05-03 14:09:36,919 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:36,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:36,936 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-03 14:09:36,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:37,162 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:37,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-05-03 14:09:37,223 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:09:37,224 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:37,224 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:09:37,225 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-05-03 14:09:37,230 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:37,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:37,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-03 14:09:37,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768482490] [2021-05-03 14:09:37,230 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:09:37,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:37,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:09:37,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:09:37,231 INFO L87 Difference]: Start difference. First operand 109 states and 301 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:37,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:37,529 INFO L93 Difference]: Finished difference Result 126 states and 330 transitions. [2021-05-03 14:09:37,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:09:37,529 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:09:37,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:37,529 INFO L225 Difference]: With dead ends: 126 [2021-05-03 14:09:37,530 INFO L226 Difference]: Without dead ends: 117 [2021-05-03 14:09:37,530 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 412.8ms TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:09:37,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-05-03 14:09:37,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 109. [2021-05-03 14:09:37,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.7685185185185186) internal successors, (299), 108 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:37,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 299 transitions. [2021-05-03 14:09:37,531 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 299 transitions. Word has length 16 [2021-05-03 14:09:37,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:37,532 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 299 transitions. [2021-05-03 14:09:37,532 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:37,532 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 299 transitions. [2021-05-03 14:09:37,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:09:37,532 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:37,532 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:37,746 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1290,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:37,747 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:37,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:37,747 INFO L82 PathProgramCache]: Analyzing trace with hash -226264360, now seen corresponding path program 38 times [2021-05-03 14:09:37,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:37,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824924342] [2021-05-03 14:09:37,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:37,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:37,889 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:37,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824924342] [2021-05-03 14:09:37,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343948198] [2021-05-03 14:09:37,889 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 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 [2021-05-03 14:09:37,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:09:37,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:37,906 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-03 14:09:37,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:38,058 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:38,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-05-03 14:09:38,109 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:09:38,167 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:38,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-05-03 14:09:38,296 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-05-03 14:09:38,367 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:38,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-05-03 14:09:38,545 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 4 xjuncts. [2021-05-03 14:09:38,568 INFO L628 ElimStorePlain]: treesize reduction 54, result has 25.0 percent of original size [2021-05-03 14:09:38,569 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:09:38,569 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-05-03 14:09:38,595 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:38,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:38,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-03 14:09:38,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281403810] [2021-05-03 14:09:38,595 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:09:38,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:38,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:09:38,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:09:38,595 INFO L87 Difference]: Start difference. First operand 109 states and 299 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:38,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:38,873 INFO L93 Difference]: Finished difference Result 150 states and 373 transitions. [2021-05-03 14:09:38,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:09:38,874 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:09:38,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:38,874 INFO L225 Difference]: With dead ends: 150 [2021-05-03 14:09:38,874 INFO L226 Difference]: Without dead ends: 140 [2021-05-03 14:09:38,874 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 333.8ms TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:09:38,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-05-03 14:09:38,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 109. [2021-05-03 14:09:38,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.7685185185185186) internal successors, (299), 108 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:38,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 299 transitions. [2021-05-03 14:09:38,876 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 299 transitions. Word has length 16 [2021-05-03 14:09:38,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:38,876 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 299 transitions. [2021-05-03 14:09:38,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:38,876 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 299 transitions. [2021-05-03 14:09:38,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:09:38,876 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:38,876 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:39,088 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1325 [2021-05-03 14:09:39,089 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:39,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:39,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1484348948, now seen corresponding path program 39 times [2021-05-03 14:09:39,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:39,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84764023] [2021-05-03 14:09:39,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:39,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:39,179 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:39,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84764023] [2021-05-03 14:09:39,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128393333] [2021-05-03 14:09:39,179 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:39,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:09:39,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:39,197 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-03 14:09:39,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:39,360 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:39,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-05-03 14:09:39,417 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:09:39,474 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:39,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-05-03 14:09:39,590 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-05-03 14:09:39,654 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:39,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-05-03 14:09:39,856 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-05-03 14:09:39,876 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-05-03 14:09:39,877 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:09:39,877 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-05-03 14:09:39,902 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:39,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:39,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-03 14:09:39,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785475055] [2021-05-03 14:09:39,902 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:09:39,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:39,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:09:39,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:09:39,903 INFO L87 Difference]: Start difference. First operand 109 states and 299 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:40,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:40,274 INFO L93 Difference]: Finished difference Result 171 states and 410 transitions. [2021-05-03 14:09:40,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 14:09:40,275 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:09:40,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:40,275 INFO L225 Difference]: With dead ends: 171 [2021-05-03 14:09:40,275 INFO L226 Difference]: Without dead ends: 161 [2021-05-03 14:09:40,275 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 307.3ms TimeCoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:09:40,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-05-03 14:09:40,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 109. [2021-05-03 14:09:40,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.7685185185185186) internal successors, (299), 108 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:40,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 299 transitions. [2021-05-03 14:09:40,277 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 299 transitions. Word has length 16 [2021-05-03 14:09:40,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:40,277 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 299 transitions. [2021-05-03 14:09:40,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:40,277 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 299 transitions. [2021-05-03 14:09:40,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:09:40,278 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:40,278 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:40,488 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1524,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:40,489 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:40,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:40,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1321213352, now seen corresponding path program 40 times [2021-05-03 14:09:40,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:40,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153570806] [2021-05-03 14:09:40,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:40,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:40,564 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:40,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153570806] [2021-05-03 14:09:40,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084047671] [2021-05-03 14:09:40,564 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:40,580 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:09:40,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:40,581 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-03 14:09:40,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:40,763 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:40,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-05-03 14:09:40,803 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:09:40,875 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:40,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-05-03 14:09:40,949 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-05-03 14:09:41,015 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:41,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-05-03 14:09:41,479 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-05-03 14:09:41,500 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-05-03 14:09:41,501 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:09:41,501 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-05-03 14:09:41,527 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:41,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:41,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-03 14:09:41,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017227072] [2021-05-03 14:09:41,528 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:09:41,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:41,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:09:41,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:09:41,528 INFO L87 Difference]: Start difference. First operand 109 states and 299 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:41,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:41,983 INFO L93 Difference]: Finished difference Result 188 states and 439 transitions. [2021-05-03 14:09:41,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:09:41,983 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:09:41,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:41,984 INFO L225 Difference]: With dead ends: 188 [2021-05-03 14:09:41,984 INFO L226 Difference]: Without dead ends: 178 [2021-05-03 14:09:41,984 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 418.3ms TimeCoverageRelationStatistics Valid=137, Invalid=733, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:09:41,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-05-03 14:09:41,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 111. [2021-05-03 14:09:41,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.7636363636363637) internal successors, (304), 110 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:41,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 304 transitions. [2021-05-03 14:09:41,986 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 304 transitions. Word has length 16 [2021-05-03 14:09:41,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:41,986 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 304 transitions. [2021-05-03 14:09:41,986 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:41,986 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 304 transitions. [2021-05-03 14:09:41,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:09:41,986 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:41,986 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:42,186 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1757 [2021-05-03 14:09:42,187 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:42,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:42,187 INFO L82 PathProgramCache]: Analyzing trace with hash 2082432313, now seen corresponding path program 41 times [2021-05-03 14:09:42,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:42,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558286199] [2021-05-03 14:09:42,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:42,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:42,215 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:42,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558286199] [2021-05-03 14:09:42,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558255657] [2021-05-03 14:09:42,215 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:42,231 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:09:42,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:42,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 14:09:42,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:42,260 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:42,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:42,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-05-03 14:09:42,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573751059] [2021-05-03 14:09:42,261 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:09:42,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:42,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:09:42,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:09:42,261 INFO L87 Difference]: Start difference. First operand 111 states and 304 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:42,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:42,320 INFO L93 Difference]: Finished difference Result 260 states and 558 transitions. [2021-05-03 14:09:42,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:09:42,321 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) 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 16 [2021-05-03 14:09:42,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:42,321 INFO L225 Difference]: With dead ends: 260 [2021-05-03 14:09:42,321 INFO L226 Difference]: Without dead ends: 260 [2021-05-03 14:09:42,321 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 43.0ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:09:42,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-05-03 14:09:42,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 121. [2021-05-03 14:09:42,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.825) internal successors, (339), 120 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:42,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 339 transitions. [2021-05-03 14:09:42,324 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 339 transitions. Word has length 16 [2021-05-03 14:09:42,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:42,324 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 339 transitions. [2021-05-03 14:09:42,324 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:42,324 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 339 transitions. [2021-05-03 14:09:42,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:09:42,324 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:42,324 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:42,536 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2026 [2021-05-03 14:09:42,537 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:42,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:42,537 INFO L82 PathProgramCache]: Analyzing trace with hash 931885580, now seen corresponding path program 42 times [2021-05-03 14:09:42,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:42,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744773722] [2021-05-03 14:09:42,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:42,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:42,678 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:42,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744773722] [2021-05-03 14:09:42,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883438508] [2021-05-03 14:09:42,679 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:42,696 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:09:42,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:42,697 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-03 14:09:42,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:42,859 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:42,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-05-03 14:09:42,888 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:09:42,889 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:42,890 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:09:42,890 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-05-03 14:09:42,894 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:42,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:42,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-03 14:09:42,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646406741] [2021-05-03 14:09:42,895 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:09:42,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:42,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:09:42,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:09:42,895 INFO L87 Difference]: Start difference. First operand 121 states and 339 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:43,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:43,161 INFO L93 Difference]: Finished difference Result 136 states and 365 transitions. [2021-05-03 14:09:43,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:09:43,162 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:09:43,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:43,162 INFO L225 Difference]: With dead ends: 136 [2021-05-03 14:09:43,162 INFO L226 Difference]: Without dead ends: 127 [2021-05-03 14:09:43,162 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 340.0ms TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:09:43,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-05-03 14:09:43,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 121. [2021-05-03 14:09:43,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.808333333333333) internal successors, (337), 120 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:43,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 337 transitions. [2021-05-03 14:09:43,164 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 337 transitions. Word has length 16 [2021-05-03 14:09:43,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:43,164 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 337 transitions. [2021-05-03 14:09:43,164 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:43,164 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 337 transitions. [2021-05-03 14:09:43,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:09:43,165 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:43,165 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:43,365 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2027,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:43,365 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:43,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:43,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1790760110, now seen corresponding path program 43 times [2021-05-03 14:09:43,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:43,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569240733] [2021-05-03 14:09:43,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:43,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:43,504 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:43,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569240733] [2021-05-03 14:09:43,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040394831] [2021-05-03 14:09:43,505 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:09:43,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:43,539 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-03 14:09:43,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:43,690 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:43,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-05-03 14:09:43,719 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:09:43,776 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:43,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-05-03 14:09:43,861 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-05-03 14:09:43,928 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:43,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-05-03 14:09:44,651 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-05-03 14:09:44,679 INFO L628 ElimStorePlain]: treesize reduction 51, result has 26.1 percent of original size [2021-05-03 14:09:44,680 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:09:44,680 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-05-03 14:09:44,706 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:44,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:44,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-03 14:09:44,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715068531] [2021-05-03 14:09:44,711 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:09:44,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:44,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:09:44,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:09:44,711 INFO L87 Difference]: Start difference. First operand 121 states and 337 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:45,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:45,050 INFO L93 Difference]: Finished difference Result 163 states and 416 transitions. [2021-05-03 14:09:45,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:09:45,050 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:09:45,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:45,051 INFO L225 Difference]: With dead ends: 163 [2021-05-03 14:09:45,051 INFO L226 Difference]: Without dead ends: 153 [2021-05-03 14:09:45,051 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 356.3ms TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:09:45,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-05-03 14:09:45,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 121. [2021-05-03 14:09:45,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.808333333333333) internal successors, (337), 120 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:45,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 337 transitions. [2021-05-03 14:09:45,053 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 337 transitions. Word has length 16 [2021-05-03 14:09:45,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:45,053 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 337 transitions. [2021-05-03 14:09:45,053 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:45,053 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 337 transitions. [2021-05-03 14:09:45,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:09:45,054 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:45,054 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:45,268 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2050,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:45,268 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:45,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:45,268 INFO L82 PathProgramCache]: Analyzing trace with hash -793593878, now seen corresponding path program 44 times [2021-05-03 14:09:45,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:45,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337935238] [2021-05-03 14:09:45,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:45,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:45,354 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:45,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337935238] [2021-05-03 14:09:45,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876509723] [2021-05-03 14:09:45,354 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:45,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:09:45,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:45,402 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-03 14:09:45,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:45,577 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:45,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-05-03 14:09:45,608 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:09:45,667 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:45,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-05-03 14:09:45,799 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-05-03 14:09:45,867 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:45,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-05-03 14:09:46,206 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-05-03 14:09:46,227 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-05-03 14:09:46,227 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:09:46,227 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-05-03 14:09:46,265 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:46,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:46,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-03 14:09:46,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136569130] [2021-05-03 14:09:46,265 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:09:46,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:46,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:09:46,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:09:46,266 INFO L87 Difference]: Start difference. First operand 121 states and 337 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:46,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:46,705 INFO L93 Difference]: Finished difference Result 192 states and 470 transitions. [2021-05-03 14:09:46,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 14:09:46,706 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:09:46,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:46,706 INFO L225 Difference]: With dead ends: 192 [2021-05-03 14:09:46,707 INFO L226 Difference]: Without dead ends: 182 [2021-05-03 14:09:46,707 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 370.8ms TimeCoverageRelationStatistics Valid=133, Invalid=737, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:09:46,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-05-03 14:09:46,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 121. [2021-05-03 14:09:46,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.808333333333333) internal successors, (337), 120 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:46,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 337 transitions. [2021-05-03 14:09:46,709 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 337 transitions. Word has length 16 [2021-05-03 14:09:46,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:46,709 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 337 transitions. [2021-05-03 14:09:46,709 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:46,709 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 337 transitions. [2021-05-03 14:09:46,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:09:46,709 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:46,709 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:46,917 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2523,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:46,917 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:46,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:46,918 INFO L82 PathProgramCache]: Analyzing trace with hash 695811118, now seen corresponding path program 45 times [2021-05-03 14:09:46,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:46,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733532449] [2021-05-03 14:09:46,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:46,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:46,988 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:46,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733532449] [2021-05-03 14:09:46,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736864387] [2021-05-03 14:09:46,989 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:47,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:09:47,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:47,006 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-03 14:09:47,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:47,201 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:47,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-05-03 14:09:47,246 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:09:47,319 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:47,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-05-03 14:09:47,401 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-05-03 14:09:47,469 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:47,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-05-03 14:09:47,616 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-05-03 14:09:47,637 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-05-03 14:09:47,638 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:09:47,638 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-05-03 14:09:47,666 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:47,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:47,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-03 14:09:47,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345405140] [2021-05-03 14:09:47,667 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:09:47,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:47,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:09:47,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:09:47,667 INFO L87 Difference]: Start difference. First operand 121 states and 337 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:48,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:48,148 INFO L93 Difference]: Finished difference Result 205 states and 493 transitions. [2021-05-03 14:09:48,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 14:09:48,149 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:09:48,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:48,149 INFO L225 Difference]: With dead ends: 205 [2021-05-03 14:09:48,149 INFO L226 Difference]: Without dead ends: 195 [2021-05-03 14:09:48,150 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 454.9ms TimeCoverageRelationStatistics Valid=177, Invalid=879, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 14:09:48,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-05-03 14:09:48,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 121. [2021-05-03 14:09:48,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.808333333333333) internal successors, (337), 120 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:48,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 337 transitions. [2021-05-03 14:09:48,152 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 337 transitions. Word has length 16 [2021-05-03 14:09:48,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:48,152 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 337 transitions. [2021-05-03 14:09:48,152 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:48,152 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 337 transitions. [2021-05-03 14:09:48,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:09:48,152 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:48,152 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:48,356 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2778 [2021-05-03 14:09:48,357 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:48,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:48,357 INFO L82 PathProgramCache]: Analyzing trace with hash -377274262, now seen corresponding path program 46 times [2021-05-03 14:09:48,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:48,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137594303] [2021-05-03 14:09:48,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:48,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:48,437 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:48,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137594303] [2021-05-03 14:09:48,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833990519] [2021-05-03 14:09:48,438 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:48,454 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:09:48,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:48,455 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-03 14:09:48,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:48,690 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:48,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-05-03 14:09:48,721 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:09:48,780 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:48,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-05-03 14:09:48,874 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-05-03 14:09:48,942 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:48,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-05-03 14:09:49,291 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-05-03 14:09:49,312 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-05-03 14:09:49,313 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:09:49,313 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-05-03 14:09:49,340 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:49,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:49,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-03 14:09:49,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644724760] [2021-05-03 14:09:49,341 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:09:49,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:49,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:09:49,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:09:49,341 INFO L87 Difference]: Start difference. First operand 121 states and 337 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:49,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:49,781 INFO L93 Difference]: Finished difference Result 165 states and 407 transitions. [2021-05-03 14:09:49,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:09:49,781 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:09:49,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:49,782 INFO L225 Difference]: With dead ends: 165 [2021-05-03 14:09:49,782 INFO L226 Difference]: Without dead ends: 155 [2021-05-03 14:09:49,782 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 511.8ms TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:09:49,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-05-03 14:09:49,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 123. [2021-05-03 14:09:49,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 2.7868852459016393) internal successors, (340), 122 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:49,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 340 transitions. [2021-05-03 14:09:49,784 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 340 transitions. Word has length 16 [2021-05-03 14:09:49,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:49,784 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 340 transitions. [2021-05-03 14:09:49,784 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:49,784 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 340 transitions. [2021-05-03 14:09:49,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:09:49,784 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:49,784 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:49,985 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2962,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:49,985 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:49,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:49,985 INFO L82 PathProgramCache]: Analyzing trace with hash 342345065, now seen corresponding path program 47 times [2021-05-03 14:09:49,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:49,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010738948] [2021-05-03 14:09:49,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:49,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:50,018 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:50,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010738948] [2021-05-03 14:09:50,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37742219] [2021-05-03 14:09:50,018 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:50,036 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:09:50,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:50,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 14:09:50,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:50,064 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:50,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:50,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-05-03 14:09:50,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420544677] [2021-05-03 14:09:50,065 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:09:50,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:50,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:09:50,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:09:50,066 INFO L87 Difference]: Start difference. First operand 123 states and 340 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:50,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:50,151 INFO L93 Difference]: Finished difference Result 247 states and 556 transitions. [2021-05-03 14:09:50,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:09:50,152 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) 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 16 [2021-05-03 14:09:50,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:50,153 INFO L225 Difference]: With dead ends: 247 [2021-05-03 14:09:50,153 INFO L226 Difference]: Without dead ends: 247 [2021-05-03 14:09:50,153 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 66.3ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:09:50,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-05-03 14:09:50,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 134. [2021-05-03 14:09:50,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.827067669172932) internal successors, (376), 133 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:50,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 376 transitions. [2021-05-03 14:09:50,156 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 376 transitions. Word has length 16 [2021-05-03 14:09:50,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:50,156 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 376 transitions. [2021-05-03 14:09:50,157 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:50,157 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 376 transitions. [2021-05-03 14:09:50,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:09:50,157 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:50,157 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:50,372 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3209 [2021-05-03 14:09:50,372 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:50,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:50,372 INFO L82 PathProgramCache]: Analyzing trace with hash -964865290, now seen corresponding path program 48 times [2021-05-03 14:09:50,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:50,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013593654] [2021-05-03 14:09:50,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:50,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:50,529 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:50,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013593654] [2021-05-03 14:09:50,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178233418] [2021-05-03 14:09:50,530 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 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 [2021-05-03 14:09:50,548 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:09:50,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:50,548 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-03 14:09:50,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:50,727 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:50,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-05-03 14:09:50,755 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:09:50,756 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:50,756 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:09:50,756 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-05-03 14:09:50,761 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:50,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:50,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-03 14:09:50,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911710641] [2021-05-03 14:09:50,762 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:09:50,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:50,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:09:50,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:09:50,762 INFO L87 Difference]: Start difference. First operand 134 states and 376 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:51,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:51,029 INFO L93 Difference]: Finished difference Result 150 states and 406 transitions. [2021-05-03 14:09:51,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:09:51,029 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:09:51,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:51,030 INFO L225 Difference]: With dead ends: 150 [2021-05-03 14:09:51,030 INFO L226 Difference]: Without dead ends: 141 [2021-05-03 14:09:51,030 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 366.2ms TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:09:51,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-05-03 14:09:51,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 134. [2021-05-03 14:09:51,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.819548872180451) internal successors, (375), 133 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:51,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 375 transitions. [2021-05-03 14:09:51,032 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 375 transitions. Word has length 16 [2021-05-03 14:09:51,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:51,032 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 375 transitions. [2021-05-03 14:09:51,032 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:51,032 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 375 transitions. [2021-05-03 14:09:51,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:09:51,033 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:51,033 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:51,233 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3210 [2021-05-03 14:09:51,233 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:51,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:51,233 INFO L82 PathProgramCache]: Analyzing trace with hash -105990760, now seen corresponding path program 49 times [2021-05-03 14:09:51,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:51,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375463371] [2021-05-03 14:09:51,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:51,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:51,380 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:51,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375463371] [2021-05-03 14:09:51,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818855594] [2021-05-03 14:09:51,381 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-03 14:09:51,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:51,400 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-03 14:09:51,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:51,564 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:51,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-05-03 14:09:51,604 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:09:51,663 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:51,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-05-03 14:09:51,811 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-05-03 14:09:51,886 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:51,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-05-03 14:09:52,353 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-05-03 14:09:52,374 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-05-03 14:09:52,375 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:09:52,375 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-05-03 14:09:52,401 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:52,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:52,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-03 14:09:52,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879607751] [2021-05-03 14:09:52,401 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:09:52,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:52,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:09:52,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:09:52,402 INFO L87 Difference]: Start difference. First operand 134 states and 375 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:52,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:52,771 INFO L93 Difference]: Finished difference Result 179 states and 464 transitions. [2021-05-03 14:09:52,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:09:52,771 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:09:52,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:52,772 INFO L225 Difference]: With dead ends: 179 [2021-05-03 14:09:52,772 INFO L226 Difference]: Without dead ends: 169 [2021-05-03 14:09:52,772 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 388.2ms TimeCoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:09:52,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-05-03 14:09:52,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 134. [2021-05-03 14:09:52,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.819548872180451) internal successors, (375), 133 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:52,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 375 transitions. [2021-05-03 14:09:52,774 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 375 transitions. Word has length 16 [2021-05-03 14:09:52,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:52,774 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 375 transitions. [2021-05-03 14:09:52,774 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:52,775 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 375 transitions. [2021-05-03 14:09:52,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:09:52,775 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:52,775 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:52,989 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3232 [2021-05-03 14:09:52,990 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:52,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:52,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1604622548, now seen corresponding path program 50 times [2021-05-03 14:09:52,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:52,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211366184] [2021-05-03 14:09:52,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:52,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:53,091 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:53,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211366184] [2021-05-03 14:09:53,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527384622] [2021-05-03 14:09:53,092 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 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 [2021-05-03 14:09:53,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:09:53,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:53,109 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-03 14:09:53,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:53,275 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:53,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-05-03 14:09:53,304 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:09:53,364 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:53,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-05-03 14:09:53,447 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-05-03 14:09:53,533 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:53,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-05-03 14:09:53,837 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-05-03 14:09:53,859 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-05-03 14:09:53,859 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:09:53,859 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-05-03 14:09:53,887 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:53,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:53,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-03 14:09:53,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158733101] [2021-05-03 14:09:53,887 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:09:53,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:53,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:09:53,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:09:53,888 INFO L87 Difference]: Start difference. First operand 134 states and 375 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:54,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:54,256 INFO L93 Difference]: Finished difference Result 203 states and 504 transitions. [2021-05-03 14:09:54,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 14:09:54,256 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:09:54,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:54,257 INFO L225 Difference]: With dead ends: 203 [2021-05-03 14:09:54,257 INFO L226 Difference]: Without dead ends: 193 [2021-05-03 14:09:54,257 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 363.4ms TimeCoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:09:54,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-05-03 14:09:54,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 134. [2021-05-03 14:09:54,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.819548872180451) internal successors, (375), 133 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:54,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 375 transitions. [2021-05-03 14:09:54,259 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 375 transitions. Word has length 16 [2021-05-03 14:09:54,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:54,259 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 375 transitions. [2021-05-03 14:09:54,259 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:54,259 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 375 transitions. [2021-05-03 14:09:54,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:09:54,259 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:54,259 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:54,468 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3578,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:54,469 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:54,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:54,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1200939752, now seen corresponding path program 51 times [2021-05-03 14:09:54,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:54,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550681774] [2021-05-03 14:09:54,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:54,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:54,551 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:54,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550681774] [2021-05-03 14:09:54,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872805640] [2021-05-03 14:09:54,551 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:54,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:09:54,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:54,569 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-03 14:09:54,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:54,759 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:54,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-05-03 14:09:54,828 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:09:54,892 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:54,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-05-03 14:09:54,941 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-05-03 14:09:55,015 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:55,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-05-03 14:09:55,366 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-05-03 14:09:55,387 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-05-03 14:09:55,388 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:09:55,388 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-05-03 14:09:55,414 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:55,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:55,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-03 14:09:55,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719994554] [2021-05-03 14:09:55,415 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:09:55,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:55,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:09:55,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:09:55,415 INFO L87 Difference]: Start difference. First operand 134 states and 375 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:56,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:56,022 INFO L93 Difference]: Finished difference Result 226 states and 546 transitions. [2021-05-03 14:09:56,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 14:09:56,022 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:09:56,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:56,023 INFO L225 Difference]: With dead ends: 226 [2021-05-03 14:09:56,023 INFO L226 Difference]: Without dead ends: 216 [2021-05-03 14:09:56,023 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 527.9ms TimeCoverageRelationStatistics Valid=203, Invalid=987, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 14:09:56,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-05-03 14:09:56,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 134. [2021-05-03 14:09:56,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.819548872180451) internal successors, (375), 133 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:56,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 375 transitions. [2021-05-03 14:09:56,025 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 375 transitions. Word has length 16 [2021-05-03 14:09:56,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:56,025 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 375 transitions. [2021-05-03 14:09:56,025 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:56,025 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 375 transitions. [2021-05-03 14:09:56,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:09:56,026 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:56,026 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:56,226 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3801 [2021-05-03 14:09:56,226 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:56,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:56,227 INFO L82 PathProgramCache]: Analyzing trace with hash 2020942164, now seen corresponding path program 52 times [2021-05-03 14:09:56,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:56,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910061052] [2021-05-03 14:09:56,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:56,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:56,305 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:56,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910061052] [2021-05-03 14:09:56,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71231925] [2021-05-03 14:09:56,306 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:56,324 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:09:56,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:56,325 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-03 14:09:56,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:56,559 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:56,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-05-03 14:09:56,590 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:09:56,648 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:56,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-05-03 14:09:56,718 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-05-03 14:09:56,787 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:56,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-05-03 14:09:57,066 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-05-03 14:09:57,087 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-05-03 14:09:57,088 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:09:57,088 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-05-03 14:09:57,114 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:57,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:57,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-03 14:09:57,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101057767] [2021-05-03 14:09:57,114 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:09:57,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:57,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:09:57,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:09:57,115 INFO L87 Difference]: Start difference. First operand 134 states and 375 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:57,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:57,537 INFO L93 Difference]: Finished difference Result 186 states and 456 transitions. [2021-05-03 14:09:57,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:09:57,537 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:09:57,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:57,538 INFO L225 Difference]: With dead ends: 186 [2021-05-03 14:09:57,538 INFO L226 Difference]: Without dead ends: 176 [2021-05-03 14:09:57,538 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 530.5ms TimeCoverageRelationStatistics Valid=176, Invalid=754, Unknown=0, NotChecked=0, Total=930 [2021-05-03 14:09:57,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-05-03 14:09:57,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 134. [2021-05-03 14:09:57,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.819548872180451) internal successors, (375), 133 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:57,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 375 transitions. [2021-05-03 14:09:57,540 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 375 transitions. Word has length 16 [2021-05-03 14:09:57,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:57,540 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 375 transitions. [2021-05-03 14:09:57,540 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:57,540 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 375 transitions. [2021-05-03 14:09:57,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:09:57,540 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:57,541 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:57,755 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4035 [2021-05-03 14:09:57,755 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:57,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:57,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1179933544, now seen corresponding path program 53 times [2021-05-03 14:09:57,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:57,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749563829] [2021-05-03 14:09:57,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:57,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:57,832 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:57,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749563829] [2021-05-03 14:09:57,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433809966] [2021-05-03 14:09:57,832 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:57,849 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:09:57,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:57,850 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-03 14:09:57,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:58,083 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:58,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-05-03 14:09:58,131 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:09:58,190 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:58,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-05-03 14:09:58,247 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-05-03 14:09:58,315 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:58,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-05-03 14:09:58,552 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-05-03 14:09:58,574 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-05-03 14:09:58,575 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:09:58,575 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-05-03 14:09:58,602 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:58,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:58,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-03 14:09:58,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370314982] [2021-05-03 14:09:58,602 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:09:58,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:58,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:09:58,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:09:58,603 INFO L87 Difference]: Start difference. First operand 134 states and 375 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:59,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:59,117 INFO L93 Difference]: Finished difference Result 186 states and 464 transitions. [2021-05-03 14:09:59,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:09:59,117 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:09:59,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:59,118 INFO L225 Difference]: With dead ends: 186 [2021-05-03 14:09:59,118 INFO L226 Difference]: Without dead ends: 176 [2021-05-03 14:09:59,118 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 626.4ms TimeCoverageRelationStatistics Valid=214, Invalid=842, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 14:09:59,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-05-03 14:09:59,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 136. [2021-05-03 14:09:59,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.8) internal successors, (378), 135 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:59,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 378 transitions. [2021-05-03 14:09:59,120 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 378 transitions. Word has length 16 [2021-05-03 14:09:59,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:59,120 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 378 transitions. [2021-05-03 14:09:59,120 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:59,120 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 378 transitions. [2021-05-03 14:09:59,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:09:59,120 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:59,120 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:59,321 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4247,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:59,321 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:59,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:59,321 INFO L82 PathProgramCache]: Analyzing trace with hash -2060752071, now seen corresponding path program 54 times [2021-05-03 14:09:59,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:59,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716612570] [2021-05-03 14:09:59,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:59,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:59,353 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:59,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716612570] [2021-05-03 14:09:59,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615956533] [2021-05-03 14:09:59,354 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 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 [2021-05-03 14:09:59,370 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 14:09:59,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:59,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 14:09:59,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:59,415 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:59,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:59,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-05-03 14:09:59,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294005500] [2021-05-03 14:09:59,416 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:09:59,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:59,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:09:59,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:09:59,416 INFO L87 Difference]: Start difference. First operand 136 states and 378 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:59,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:59,527 INFO L93 Difference]: Finished difference Result 245 states and 574 transitions. [2021-05-03 14:09:59,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:09:59,527 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) 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 16 [2021-05-03 14:09:59,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:59,528 INFO L225 Difference]: With dead ends: 245 [2021-05-03 14:09:59,528 INFO L226 Difference]: Without dead ends: 245 [2021-05-03 14:09:59,528 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 83.7ms TimeCoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:09:59,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-05-03 14:09:59,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 144. [2021-05-03 14:09:59,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.8181818181818183) internal successors, (403), 143 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:59,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 403 transitions. [2021-05-03 14:09:59,545 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 403 transitions. Word has length 16 [2021-05-03 14:09:59,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:59,545 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 403 transitions. [2021-05-03 14:09:59,545 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:59,545 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 403 transitions. [2021-05-03 14:09:59,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:09:59,545 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:59,545 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:59,746 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4454,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:59,746 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:59,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:59,746 INFO L82 PathProgramCache]: Analyzing trace with hash 365399884, now seen corresponding path program 55 times [2021-05-03 14:09:59,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:59,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823061162] [2021-05-03 14:09:59,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:59,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:59,895 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:59,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823061162] [2021-05-03 14:09:59,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031084602] [2021-05-03 14:09:59,895 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:59,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:59,912 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-03 14:09:59,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:00,075 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:10:00,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-05-03 14:10:00,110 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:10:00,111 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:10:00,112 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:10:00,112 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-05-03 14:10:00,116 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:00,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:00,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-03 14:10:00,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509925067] [2021-05-03 14:10:00,117 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:10:00,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:00,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:10:00,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:10:00,117 INFO L87 Difference]: Start difference. First operand 144 states and 403 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:00,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:00,320 INFO L93 Difference]: Finished difference Result 164 states and 445 transitions. [2021-05-03 14:10:00,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:10:00,320 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:10:00,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:00,321 INFO L225 Difference]: With dead ends: 164 [2021-05-03 14:10:00,321 INFO L226 Difference]: Without dead ends: 155 [2021-05-03 14:10:00,321 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 278.1ms TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:10:00,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-05-03 14:10:00,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 145. [2021-05-03 14:10:00,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.8194444444444446) internal successors, (406), 144 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:00,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 406 transitions. [2021-05-03 14:10:00,323 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 406 transitions. Word has length 16 [2021-05-03 14:10:00,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:00,323 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 406 transitions. [2021-05-03 14:10:00,323 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:00,323 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 406 transitions. [2021-05-03 14:10:00,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:10:00,323 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:00,323 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:00,536 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4455,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:00,537 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:00,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:00,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1224274414, now seen corresponding path program 56 times [2021-05-03 14:10:00,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:00,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633384093] [2021-05-03 14:10:00,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:00,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:00,696 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:00,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633384093] [2021-05-03 14:10:00,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004317417] [2021-05-03 14:10:00,696 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:00,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:10:00,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:00,713 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-03 14:10:00,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:00,864 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:10:00,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-05-03 14:10:00,899 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:10:00,963 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:10:00,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-05-03 14:10:01,073 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-05-03 14:10:01,148 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:10:01,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-05-03 14:10:01,666 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-05-03 14:10:01,688 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-05-03 14:10:01,688 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:10:01,688 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-05-03 14:10:01,715 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:01,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:01,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-03 14:10:01,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484496891] [2021-05-03 14:10:01,715 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:10:01,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:01,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:10:01,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:10:01,716 INFO L87 Difference]: Start difference. First operand 145 states and 406 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:02,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:02,061 INFO L93 Difference]: Finished difference Result 199 states and 522 transitions. [2021-05-03 14:10:02,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 14:10:02,061 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:10:02,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:02,062 INFO L225 Difference]: With dead ends: 199 [2021-05-03 14:10:02,062 INFO L226 Difference]: Without dead ends: 189 [2021-05-03 14:10:02,062 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 350.8ms TimeCoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:10:02,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-05-03 14:10:02,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 144. [2021-05-03 14:10:02,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.8181818181818183) internal successors, (403), 143 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:02,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 403 transitions. [2021-05-03 14:10:02,064 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 403 transitions. Word has length 16 [2021-05-03 14:10:02,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:02,064 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 403 transitions. [2021-05-03 14:10:02,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:02,064 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 403 transitions. [2021-05-03 14:10:02,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:10:02,065 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:02,065 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:02,273 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4486 [2021-05-03 14:10:02,273 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:02,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:02,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1360079574, now seen corresponding path program 57 times [2021-05-03 14:10:02,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:02,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45119947] [2021-05-03 14:10:02,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:02,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:02,390 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:02,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45119947] [2021-05-03 14:10:02,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734293916] [2021-05-03 14:10:02,390 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:02,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:10:02,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:02,409 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-03 14:10:02,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:02,584 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:10:02,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-05-03 14:10:02,642 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:10:02,705 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:10:02,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-05-03 14:10:02,790 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-05-03 14:10:02,860 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:10:02,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-05-03 14:10:03,420 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-05-03 14:10:03,444 INFO L628 ElimStorePlain]: treesize reduction 59, result has 23.4 percent of original size [2021-05-03 14:10:03,444 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:10:03,444 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-05-03 14:10:03,472 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:03,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:03,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-03 14:10:03,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966833638] [2021-05-03 14:10:03,473 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:10:03,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:03,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:10:03,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:10:03,473 INFO L87 Difference]: Start difference. First operand 144 states and 403 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:03,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:03,987 INFO L93 Difference]: Finished difference Result 222 states and 560 transitions. [2021-05-03 14:10:03,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 14:10:03,988 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:10:03,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:03,989 INFO L225 Difference]: With dead ends: 222 [2021-05-03 14:10:03,989 INFO L226 Difference]: Without dead ends: 212 [2021-05-03 14:10:03,989 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 474.3ms TimeCoverageRelationStatistics Valid=152, Invalid=840, Unknown=0, NotChecked=0, Total=992 [2021-05-03 14:10:03,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-05-03 14:10:03,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 145. [2021-05-03 14:10:03,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.8194444444444446) internal successors, (406), 144 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:03,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 406 transitions. [2021-05-03 14:10:03,991 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 406 transitions. Word has length 16 [2021-05-03 14:10:03,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:03,991 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 406 transitions. [2021-05-03 14:10:03,991 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:03,991 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 406 transitions. [2021-05-03 14:10:03,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:10:03,991 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:03,991 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:04,192 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4855 [2021-05-03 14:10:04,192 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:04,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:04,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1298863593, now seen corresponding path program 58 times [2021-05-03 14:10:04,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:04,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667660923] [2021-05-03 14:10:04,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:04,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:04,230 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:04,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667660923] [2021-05-03 14:10:04,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206459856] [2021-05-03 14:10:04,230 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 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 [2021-05-03 14:10:04,247 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:10:04,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:04,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 14:10:04,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:04,273 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:10:04,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:04,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-05-03 14:10:04,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602437561] [2021-05-03 14:10:04,274 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 14:10:04,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:04,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 14:10:04,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:10:04,274 INFO L87 Difference]: Start difference. First operand 145 states and 406 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:04,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:04,314 INFO L93 Difference]: Finished difference Result 273 states and 654 transitions. [2021-05-03 14:10:04,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:10:04,314 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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 16 [2021-05-03 14:10:04,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:04,315 INFO L225 Difference]: With dead ends: 273 [2021-05-03 14:10:04,315 INFO L226 Difference]: Without dead ends: 273 [2021-05-03 14:10:04,315 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 30.5ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:10:04,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-05-03 14:10:04,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 175. [2021-05-03 14:10:04,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.8908045977011496) internal successors, (503), 174 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:04,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 503 transitions. [2021-05-03 14:10:04,320 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 503 transitions. Word has length 16 [2021-05-03 14:10:04,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:04,320 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 503 transitions. [2021-05-03 14:10:04,321 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:04,321 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 503 transitions. [2021-05-03 14:10:04,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:10:04,321 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:04,321 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:04,521 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5218,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:04,522 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:04,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:04,522 INFO L82 PathProgramCache]: Analyzing trace with hash 129325422, now seen corresponding path program 59 times [2021-05-03 14:10:04,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:04,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470827374] [2021-05-03 14:10:04,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:04,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:04,600 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:04,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470827374] [2021-05-03 14:10:04,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059990168] [2021-05-03 14:10:04,601 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:04,617 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:10:04,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:04,618 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-03 14:10:04,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:04,809 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:10:04,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-05-03 14:10:04,842 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:10:04,902 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:10:04,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-05-03 14:10:05,054 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-05-03 14:10:05,249 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-05-03 14:10:05,249 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:10:05,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-05-03 14:10:05,790 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-05-03 14:10:05,811 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-05-03 14:10:05,812 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:10:05,812 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-05-03 14:10:05,838 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:05,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:05,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-03 14:10:05,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484664119] [2021-05-03 14:10:05,839 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:10:05,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:05,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:10:05,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:10:05,839 INFO L87 Difference]: Start difference. First operand 175 states and 503 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:06,567 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2021-05-03 14:10:06,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:06,680 INFO L93 Difference]: Finished difference Result 273 states and 689 transitions. [2021-05-03 14:10:06,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 14:10:06,681 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:10:06,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:06,681 INFO L225 Difference]: With dead ends: 273 [2021-05-03 14:10:06,682 INFO L226 Difference]: Without dead ends: 263 [2021-05-03 14:10:06,682 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 787.3ms TimeCoverageRelationStatistics Valid=195, Invalid=995, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 14:10:06,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-05-03 14:10:06,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 176. [2021-05-03 14:10:06,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.874285714285714) internal successors, (503), 175 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:06,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 503 transitions. [2021-05-03 14:10:06,684 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 503 transitions. Word has length 16 [2021-05-03 14:10:06,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:06,684 INFO L480 AbstractCegarLoop]: Abstraction has 176 states and 503 transitions. [2021-05-03 14:10:06,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:06,684 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 503 transitions. [2021-05-03 14:10:06,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:10:06,685 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:06,685 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:06,885 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5219 [2021-05-03 14:10:06,885 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:06,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:06,886 INFO L82 PathProgramCache]: Analyzing trace with hash -761996209, now seen corresponding path program 60 times [2021-05-03 14:10:06,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:06,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377794898] [2021-05-03 14:10:06,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:06,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:06,928 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:06,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377794898] [2021-05-03 14:10:06,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132653495] [2021-05-03 14:10:06,928 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:06,957 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:10:06,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:06,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 14:10:06,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:06,990 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:06,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:06,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-05-03 14:10:06,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393723744] [2021-05-03 14:10:06,990 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:10:06,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:06,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:10:06,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:10:06,991 INFO L87 Difference]: Start difference. First operand 176 states and 503 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:07,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:07,062 INFO L93 Difference]: Finished difference Result 300 states and 694 transitions. [2021-05-03 14:10:07,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 14:10:07,062 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 16 [2021-05-03 14:10:07,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:07,063 INFO L225 Difference]: With dead ends: 300 [2021-05-03 14:10:07,063 INFO L226 Difference]: Without dead ends: 300 [2021-05-03 14:10:07,063 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 51.3ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:10:07,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-05-03 14:10:07,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 174. [2021-05-03 14:10:07,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.867052023121387) internal successors, (496), 173 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:07,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 496 transitions. [2021-05-03 14:10:07,066 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 496 transitions. Word has length 16 [2021-05-03 14:10:07,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:07,066 INFO L480 AbstractCegarLoop]: Abstraction has 174 states and 496 transitions. [2021-05-03 14:10:07,067 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:07,067 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 496 transitions. [2021-05-03 14:10:07,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:10:07,067 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:07,067 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:07,273 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5427,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:07,273 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:07,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:07,273 INFO L82 PathProgramCache]: Analyzing trace with hash -943759958, now seen corresponding path program 61 times [2021-05-03 14:10:07,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:07,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013032601] [2021-05-03 14:10:07,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:07,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:07,409 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:07,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013032601] [2021-05-03 14:10:07,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749606161] [2021-05-03 14:10:07,409 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:07,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:07,488 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-03 14:10:07,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:07,952 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:10:07,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-05-03 14:10:07,987 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:10:08,050 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:10:08,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-05-03 14:10:08,148 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-05-03 14:10:08,233 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:10:08,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-05-03 14:10:08,801 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-05-03 14:10:08,823 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-05-03 14:10:08,823 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:10:08,824 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-05-03 14:10:08,851 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:08,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:08,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-03 14:10:08,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434147450] [2021-05-03 14:10:08,851 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:10:08,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:08,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:10:08,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:10:08,852 INFO L87 Difference]: Start difference. First operand 174 states and 496 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:09,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:09,397 INFO L93 Difference]: Finished difference Result 242 states and 614 transitions. [2021-05-03 14:10:09,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:10:09,397 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:10:09,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:09,398 INFO L225 Difference]: With dead ends: 242 [2021-05-03 14:10:09,398 INFO L226 Difference]: Without dead ends: 232 [2021-05-03 14:10:09,398 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 798.1ms TimeCoverageRelationStatistics Valid=188, Invalid=804, Unknown=0, NotChecked=0, Total=992 [2021-05-03 14:10:09,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-05-03 14:10:09,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 174. [2021-05-03 14:10:09,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.867052023121387) internal successors, (496), 173 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:09,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 496 transitions. [2021-05-03 14:10:09,401 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 496 transitions. Word has length 16 [2021-05-03 14:10:09,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:09,401 INFO L480 AbstractCegarLoop]: Abstraction has 174 states and 496 transitions. [2021-05-03 14:10:09,401 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:09,401 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 496 transitions. [2021-05-03 14:10:09,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:10:09,401 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:09,401 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:09,616 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5428 [2021-05-03 14:10:09,616 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:09,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:09,616 INFO L82 PathProgramCache]: Analyzing trace with hash -224140631, now seen corresponding path program 62 times [2021-05-03 14:10:09,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:09,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25715065] [2021-05-03 14:10:09,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:09,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:09,650 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:09,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25715065] [2021-05-03 14:10:09,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623826504] [2021-05-03 14:10:09,650 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:09,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:10:09,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:09,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 14:10:09,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:09,702 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:09,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:09,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-05-03 14:10:09,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600617634] [2021-05-03 14:10:09,703 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:10:09,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:09,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:10:09,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:10:09,703 INFO L87 Difference]: Start difference. First operand 174 states and 496 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:09,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:09,796 INFO L93 Difference]: Finished difference Result 262 states and 627 transitions. [2021-05-03 14:10:09,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:10:09,797 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 16 [2021-05-03 14:10:09,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:09,797 INFO L225 Difference]: With dead ends: 262 [2021-05-03 14:10:09,797 INFO L226 Difference]: Without dead ends: 262 [2021-05-03 14:10:09,798 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 70.2ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:10:09,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-05-03 14:10:09,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 167. [2021-05-03 14:10:09,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.855421686746988) internal successors, (474), 166 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:09,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 474 transitions. [2021-05-03 14:10:09,800 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 474 transitions. Word has length 16 [2021-05-03 14:10:09,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:09,800 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 474 transitions. [2021-05-03 14:10:09,800 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:09,800 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 474 transitions. [2021-05-03 14:10:09,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:10:09,813 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:09,813 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:10,013 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5771,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:10,013 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:10,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:10,014 INFO L82 PathProgramCache]: Analyzing trace with hash 150331630, now seen corresponding path program 63 times [2021-05-03 14:10:10,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:10,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65886287] [2021-05-03 14:10:10,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:10,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:10,109 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:10,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65886287] [2021-05-03 14:10:10,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800887805] [2021-05-03 14:10:10,109 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:10,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:10:10,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:10,129 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-03 14:10:10,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:10,398 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:10:10,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-05-03 14:10:10,439 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:10:10,530 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:10:10,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-05-03 14:10:10,942 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-05-03 14:10:10,989 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:10:10,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-05-03 14:10:11,094 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-05-03 14:10:11,130 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-05-03 14:10:11,131 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:10:11,131 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-05-03 14:10:11,160 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:11,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:11,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-03 14:10:11,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117065946] [2021-05-03 14:10:11,161 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:10:11,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:11,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:10:11,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:10:11,162 INFO L87 Difference]: Start difference. First operand 167 states and 474 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:12,097 WARN L205 SmtUtils]: Spent 524.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-05-03 14:10:12,367 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-05-03 14:10:12,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:12,413 INFO L93 Difference]: Finished difference Result 233 states and 590 transitions. [2021-05-03 14:10:12,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:10:12,413 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:10:12,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:12,414 INFO L225 Difference]: With dead ends: 233 [2021-05-03 14:10:12,414 INFO L226 Difference]: Without dead ends: 223 [2021-05-03 14:10:12,414 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 1373.0ms TimeCoverageRelationStatistics Valid=231, Invalid=891, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 14:10:12,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-05-03 14:10:12,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 167. [2021-05-03 14:10:12,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.855421686746988) internal successors, (474), 166 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:12,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 474 transitions. [2021-05-03 14:10:12,416 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 474 transitions. Word has length 16 [2021-05-03 14:10:12,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:12,416 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 474 transitions. [2021-05-03 14:10:12,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:12,417 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 474 transitions. [2021-05-03 14:10:12,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:10:12,417 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:12,417 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:12,632 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5772 [2021-05-03 14:10:12,632 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:12,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:12,632 INFO L82 PathProgramCache]: Analyzing trace with hash -730486897, now seen corresponding path program 64 times [2021-05-03 14:10:12,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:12,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483413372] [2021-05-03 14:10:12,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:12,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:12,672 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:12,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483413372] [2021-05-03 14:10:12,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509423550] [2021-05-03 14:10:12,672 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 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 [2021-05-03 14:10:12,693 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:10:12,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:12,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 14:10:12,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:12,739 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:12,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:12,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-05-03 14:10:12,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626300927] [2021-05-03 14:10:12,739 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:10:12,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:12,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:10:12,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:10:12,740 INFO L87 Difference]: Start difference. First operand 167 states and 474 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:12,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:12,861 INFO L93 Difference]: Finished difference Result 257 states and 618 transitions. [2021-05-03 14:10:12,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:10:12,861 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 16 [2021-05-03 14:10:12,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:12,862 INFO L225 Difference]: With dead ends: 257 [2021-05-03 14:10:12,862 INFO L226 Difference]: Without dead ends: 257 [2021-05-03 14:10:12,862 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 100.5ms TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:10:12,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-05-03 14:10:12,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 167. [2021-05-03 14:10:12,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.855421686746988) internal successors, (474), 166 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:12,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 474 transitions. [2021-05-03 14:10:12,871 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 474 transitions. Word has length 16 [2021-05-03 14:10:12,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:12,871 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 474 transitions. [2021-05-03 14:10:12,871 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:12,871 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 474 transitions. [2021-05-03 14:10:12,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:10:12,871 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:12,871 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:13,081 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6078 [2021-05-03 14:10:13,081 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:13,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:13,081 INFO L82 PathProgramCache]: Analyzing trace with hash -292567510, now seen corresponding path program 65 times [2021-05-03 14:10:13,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:13,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543633525] [2021-05-03 14:10:13,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:13,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:13,181 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:13,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543633525] [2021-05-03 14:10:13,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677062420] [2021-05-03 14:10:13,182 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:13,204 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:10:13,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:13,204 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-03 14:10:13,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:13,533 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:10:13,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-05-03 14:10:13,567 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:10:13,658 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:10:13,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-05-03 14:10:14,522 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-05-03 14:10:14,572 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:10:14,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-05-03 14:10:14,753 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-05-03 14:10:14,786 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-05-03 14:10:14,786 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:10:14,786 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-05-03 14:10:14,815 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:14,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:14,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-03 14:10:14,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756016429] [2021-05-03 14:10:14,815 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:10:14,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:14,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:10:14,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:10:14,817 INFO L87 Difference]: Start difference. First operand 167 states and 474 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:15,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:15,526 INFO L93 Difference]: Finished difference Result 220 states and 566 transitions. [2021-05-03 14:10:15,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:10:15,527 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:10:15,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:15,527 INFO L225 Difference]: With dead ends: 220 [2021-05-03 14:10:15,527 INFO L226 Difference]: Without dead ends: 210 [2021-05-03 14:10:15,528 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 854.4ms TimeCoverageRelationStatistics Valid=238, Invalid=884, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 14:10:15,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-05-03 14:10:15,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 169. [2021-05-03 14:10:15,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 2.8392857142857144) internal successors, (477), 168 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:15,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 477 transitions. [2021-05-03 14:10:15,539 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 477 transitions. Word has length 16 [2021-05-03 14:10:15,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:15,539 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 477 transitions. [2021-05-03 14:10:15,540 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:15,540 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 477 transitions. [2021-05-03 14:10:15,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:10:15,540 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:15,540 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:15,749 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6079 [2021-05-03 14:10:15,749 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:15,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:15,749 INFO L82 PathProgramCache]: Analyzing trace with hash 752648041, now seen corresponding path program 66 times [2021-05-03 14:10:15,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:15,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913124570] [2021-05-03 14:10:15,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:15,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:15,806 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:15,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913124570] [2021-05-03 14:10:15,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52738464] [2021-05-03 14:10:15,807 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:15,825 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:10:15,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:15,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 14:10:15,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:15,855 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:15,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:15,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-05-03 14:10:15,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908097357] [2021-05-03 14:10:15,856 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:10:15,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:15,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:10:15,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:10:15,856 INFO L87 Difference]: Start difference. First operand 169 states and 477 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:15,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:15,983 INFO L93 Difference]: Finished difference Result 283 states and 699 transitions. [2021-05-03 14:10:15,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:10:15,983 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 16 [2021-05-03 14:10:15,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:15,984 INFO L225 Difference]: With dead ends: 283 [2021-05-03 14:10:15,984 INFO L226 Difference]: Without dead ends: 283 [2021-05-03 14:10:15,984 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 96.8ms TimeCoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:10:15,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-05-03 14:10:15,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 176. [2021-05-03 14:10:15,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.8457142857142856) internal successors, (498), 175 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:15,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 498 transitions. [2021-05-03 14:10:15,987 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 498 transitions. Word has length 16 [2021-05-03 14:10:15,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:15,987 INFO L480 AbstractCegarLoop]: Abstraction has 176 states and 498 transitions. [2021-05-03 14:10:15,987 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:15,987 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 498 transitions. [2021-05-03 14:10:15,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:10:15,987 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:15,987 INFO L551 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:16,202 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6538,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:16,203 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:16,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:16,203 INFO L82 PathProgramCache]: Analyzing trace with hash -883413798, now seen corresponding path program 67 times [2021-05-03 14:10:16,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:16,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60611252] [2021-05-03 14:10:16,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:16,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:16,327 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:16,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60611252] [2021-05-03 14:10:16,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898736708] [2021-05-03 14:10:16,327 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:16,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:16,356 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-03 14:10:16,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:16,615 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:10:16,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-05-03 14:10:16,735 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:10:16,736 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:10:16,736 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:10:16,737 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-05-03 14:10:16,742 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:16,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:16,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-03 14:10:16,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254913184] [2021-05-03 14:10:16,742 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:10:16,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:16,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:10:16,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:10:16,742 INFO L87 Difference]: Start difference. First operand 176 states and 498 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:17,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:17,058 INFO L93 Difference]: Finished difference Result 212 states and 582 transitions. [2021-05-03 14:10:17,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:10:17,058 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) 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 17 [2021-05-03 14:10:17,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:17,059 INFO L225 Difference]: With dead ends: 212 [2021-05-03 14:10:17,059 INFO L226 Difference]: Without dead ends: 198 [2021-05-03 14:10:17,059 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 297.4ms TimeCoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:10:17,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-05-03 14:10:17,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 186. [2021-05-03 14:10:17,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.8702702702702703) internal successors, (531), 185 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:17,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 531 transitions. [2021-05-03 14:10:17,062 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 531 transitions. Word has length 17 [2021-05-03 14:10:17,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:17,062 INFO L480 AbstractCegarLoop]: Abstraction has 186 states and 531 transitions. [2021-05-03 14:10:17,062 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:17,062 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 531 transitions. [2021-05-03 14:10:17,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:10:17,062 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:17,062 INFO L551 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:17,263 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6539,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:17,263 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:17,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:17,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1745149700, now seen corresponding path program 68 times [2021-05-03 14:10:17,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:17,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124511889] [2021-05-03 14:10:17,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:17,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:17,407 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:17,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124511889] [2021-05-03 14:10:17,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159832849] [2021-05-03 14:10:17,407 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:17,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:10:17,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:17,437 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-03 14:10:17,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:17,885 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2021-05-03 14:10:18,059 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:10:18,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-05-03 14:10:18,135 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:10:18,137 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:10:18,137 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:10:18,137 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-05-03 14:10:18,142 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:18,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:18,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-03 14:10:18,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235299474] [2021-05-03 14:10:18,143 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:10:18,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:18,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:10:18,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:10:18,143 INFO L87 Difference]: Start difference. First operand 186 states and 531 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:18,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:18,482 INFO L93 Difference]: Finished difference Result 207 states and 575 transitions. [2021-05-03 14:10:18,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:10:18,482 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) 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 17 [2021-05-03 14:10:18,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:18,483 INFO L225 Difference]: With dead ends: 207 [2021-05-03 14:10:18,483 INFO L226 Difference]: Without dead ends: 198 [2021-05-03 14:10:18,483 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 700.1ms TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:10:18,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-05-03 14:10:18,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 187. [2021-05-03 14:10:18,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.860215053763441) internal successors, (532), 186 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:18,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 532 transitions. [2021-05-03 14:10:18,486 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 532 transitions. Word has length 17 [2021-05-03 14:10:18,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:18,486 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 532 transitions. [2021-05-03 14:10:18,486 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:18,486 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 532 transitions. [2021-05-03 14:10:18,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:10:18,487 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:18,487 INFO L551 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:18,696 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6623,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:18,697 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:18,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:18,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1690943066, now seen corresponding path program 69 times [2021-05-03 14:10:18,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:18,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357497569] [2021-05-03 14:10:18,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:18,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:18,825 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:18,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357497569] [2021-05-03 14:10:18,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848171723] [2021-05-03 14:10:18,826 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:18,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:10:18,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:18,852 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-03 14:10:18,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:19,116 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:10:19,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 193 [2021-05-03 14:10:19,555 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-05-03 14:10:19,606 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:10:19,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-05-03 14:10:19,714 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:10:19,732 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-05-03 14:10:19,733 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:10:19,733 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:83, output treesize:18 [2021-05-03 14:10:19,762 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:19,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:19,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-03 14:10:19,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010189908] [2021-05-03 14:10:19,763 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:10:19,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:19,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:10:19,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:10:19,764 INFO L87 Difference]: Start difference. First operand 187 states and 532 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:20,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:20,146 INFO L93 Difference]: Finished difference Result 235 states and 628 transitions. [2021-05-03 14:10:20,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 14:10:20,148 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) 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 17 [2021-05-03 14:10:20,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:20,149 INFO L225 Difference]: With dead ends: 235 [2021-05-03 14:10:20,149 INFO L226 Difference]: Without dead ends: 225 [2021-05-03 14:10:20,149 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 320.2ms TimeCoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:10:20,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-05-03 14:10:20,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 186. [2021-05-03 14:10:20,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.8594594594594596) internal successors, (529), 185 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:20,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 529 transitions. [2021-05-03 14:10:20,151 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 529 transitions. Word has length 17 [2021-05-03 14:10:20,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:20,151 INFO L480 AbstractCegarLoop]: Abstraction has 186 states and 529 transitions. [2021-05-03 14:10:20,151 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:20,151 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 529 transitions. [2021-05-03 14:10:20,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:10:20,152 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:20,152 INFO L551 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:20,365 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6669,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:20,365 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:20,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:20,365 INFO L82 PathProgramCache]: Analyzing trace with hash -2038563784, now seen corresponding path program 70 times [2021-05-03 14:10:20,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:20,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845485283] [2021-05-03 14:10:20,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:20,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:20,537 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:20,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845485283] [2021-05-03 14:10:20,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14928463] [2021-05-03 14:10:20,539 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:20,562 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:10:20,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:20,562 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-03 14:10:20,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:20,873 INFO L244 Elim1Store]: Index analysis took 139 ms [2021-05-03 14:10:20,965 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:10:20,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 193 [2021-05-03 14:10:21,174 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-05-03 14:10:21,224 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:10:21,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-05-03 14:10:21,344 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:10:21,363 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-05-03 14:10:21,363 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:10:21,363 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:83, output treesize:18 [2021-05-03 14:10:21,392 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:21,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:21,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-03 14:10:21,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072989722] [2021-05-03 14:10:21,393 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:10:21,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:21,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:10:21,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:10:21,393 INFO L87 Difference]: Start difference. First operand 186 states and 529 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:21,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:21,876 INFO L93 Difference]: Finished difference Result 263 states and 678 transitions. [2021-05-03 14:10:21,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 14:10:21,877 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) 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 17 [2021-05-03 14:10:21,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:21,878 INFO L225 Difference]: With dead ends: 263 [2021-05-03 14:10:21,878 INFO L226 Difference]: Without dead ends: 253 [2021-05-03 14:10:21,878 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 458.9ms TimeCoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:10:21,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-05-03 14:10:21,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 187. [2021-05-03 14:10:21,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.860215053763441) internal successors, (532), 186 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:21,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 532 transitions. [2021-05-03 14:10:21,880 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 532 transitions. Word has length 17 [2021-05-03 14:10:21,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:21,880 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 532 transitions. [2021-05-03 14:10:21,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:21,880 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 532 transitions. [2021-05-03 14:10:21,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:10:21,881 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:21,881 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:22,081 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6976,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:22,081 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:22,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:22,082 INFO L82 PathProgramCache]: Analyzing trace with hash 620379383, now seen corresponding path program 71 times [2021-05-03 14:10:22,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:22,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368435153] [2021-05-03 14:10:22,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:22,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:22,291 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:22,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368435153] [2021-05-03 14:10:22,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301207794] [2021-05-03 14:10:22,292 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:22,315 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:10:22,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:22,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 14:10:22,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:22,349 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:22,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:22,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-05-03 14:10:22,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759701787] [2021-05-03 14:10:22,350 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:10:22,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:22,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:10:22,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:10:22,350 INFO L87 Difference]: Start difference. First operand 187 states and 532 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:22,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:22,400 INFO L93 Difference]: Finished difference Result 357 states and 825 transitions. [2021-05-03 14:10:22,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 14:10:22,401 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 17 [2021-05-03 14:10:22,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:22,402 INFO L225 Difference]: With dead ends: 357 [2021-05-03 14:10:22,402 INFO L226 Difference]: Without dead ends: 357 [2021-05-03 14:10:22,402 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 207.7ms TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:10:22,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-05-03 14:10:22,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 189. [2021-05-03 14:10:22,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.867021276595745) internal successors, (539), 188 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:22,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 539 transitions. [2021-05-03 14:10:22,417 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 539 transitions. Word has length 17 [2021-05-03 14:10:22,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:22,417 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 539 transitions. [2021-05-03 14:10:22,417 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:22,417 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 539 transitions. [2021-05-03 14:10:22,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:10:22,417 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:22,417 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:22,617 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7167 [2021-05-03 14:10:22,618 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:22,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:22,618 INFO L82 PathProgramCache]: Analyzing trace with hash -821225785, now seen corresponding path program 72 times [2021-05-03 14:10:22,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:22,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082723196] [2021-05-03 14:10:22,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:22,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:22,669 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:22,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082723196] [2021-05-03 14:10:22,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929512477] [2021-05-03 14:10:22,669 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:10:22,695 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:10:22,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:22,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 14:10:22,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:22,724 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:22,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:22,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-05-03 14:10:22,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163570662] [2021-05-03 14:10:22,724 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:10:22,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:22,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:10:22,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:10:22,727 INFO L87 Difference]: Start difference. First operand 189 states and 539 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:22,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:22,793 INFO L93 Difference]: Finished difference Result 374 states and 857 transitions. [2021-05-03 14:10:22,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:10:22,800 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 17 [2021-05-03 14:10:22,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:22,801 INFO L225 Difference]: With dead ends: 374 [2021-05-03 14:10:22,801 INFO L226 Difference]: Without dead ends: 374 [2021-05-03 14:10:22,802 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 55.3ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:10:22,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-05-03 14:10:22,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 189. [2021-05-03 14:10:22,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.867021276595745) internal successors, (539), 188 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:22,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 539 transitions. [2021-05-03 14:10:22,804 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 539 transitions. Word has length 17 [2021-05-03 14:10:22,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:22,804 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 539 transitions. [2021-05-03 14:10:22,805 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:22,805 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 539 transitions. [2021-05-03 14:10:22,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:10:22,805 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:22,805 INFO L551 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:23,005 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7168 [2021-05-03 14:10:23,006 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:23,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:23,006 INFO L82 PathProgramCache]: Analyzing trace with hash -1971772518, now seen corresponding path program 73 times [2021-05-03 14:10:23,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:23,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292764445] [2021-05-03 14:10:23,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:23,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:23,237 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:23,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292764445] [2021-05-03 14:10:23,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337390064] [2021-05-03 14:10:23,237 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:23,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:23,255 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-03 14:10:23,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:23,490 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:10:23,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-05-03 14:10:23,558 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:10:23,559 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:10:23,560 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:10:23,560 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-05-03 14:10:23,565 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:23,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:23,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-03 14:10:23,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348386029] [2021-05-03 14:10:23,565 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:10:23,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:23,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:10:23,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:10:23,566 INFO L87 Difference]: Start difference. First operand 189 states and 539 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:23,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:23,868 INFO L93 Difference]: Finished difference Result 202 states and 560 transitions. [2021-05-03 14:10:23,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:10:23,869 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) 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 17 [2021-05-03 14:10:23,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:23,869 INFO L225 Difference]: With dead ends: 202 [2021-05-03 14:10:23,869 INFO L226 Difference]: Without dead ends: 193 [2021-05-03 14:10:23,870 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 455.4ms TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:10:23,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-05-03 14:10:23,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 189. [2021-05-03 14:10:23,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.856382978723404) internal successors, (537), 188 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:23,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 537 transitions. [2021-05-03 14:10:23,872 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 537 transitions. Word has length 17 [2021-05-03 14:10:23,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:23,872 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 537 transitions. [2021-05-03 14:10:23,872 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:23,872 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 537 transitions. [2021-05-03 14:10:23,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:10:23,872 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:23,872 INFO L551 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:24,077 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7169 [2021-05-03 14:10:24,077 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:24,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:24,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1112897988, now seen corresponding path program 74 times [2021-05-03 14:10:24,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:24,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138835630] [2021-05-03 14:10:24,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:24,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:24,319 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:24,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138835630] [2021-05-03 14:10:24,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651875388] [2021-05-03 14:10:24,320 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:24,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:10:24,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:24,339 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-03 14:10:24,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:24,610 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:10:24,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 193 [2021-05-03 14:10:25,227 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-05-03 14:10:25,278 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:10:25,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-05-03 14:10:25,413 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:10:25,432 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-05-03 14:10:25,432 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:10:25,433 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:83, output treesize:18 [2021-05-03 14:10:25,462 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:25,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:25,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-03 14:10:25,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530158520] [2021-05-03 14:10:25,462 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:10:25,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:25,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:10:25,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:10:25,463 INFO L87 Difference]: Start difference. First operand 189 states and 537 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:25,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:25,846 INFO L93 Difference]: Finished difference Result 227 states and 606 transitions. [2021-05-03 14:10:25,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:10:25,846 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) 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 17 [2021-05-03 14:10:25,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:25,847 INFO L225 Difference]: With dead ends: 227 [2021-05-03 14:10:25,847 INFO L226 Difference]: Without dead ends: 217 [2021-05-03 14:10:25,847 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 459.7ms TimeCoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:10:25,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-05-03 14:10:25,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 189. [2021-05-03 14:10:25,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.856382978723404) internal successors, (537), 188 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:25,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 537 transitions. [2021-05-03 14:10:25,850 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 537 transitions. Word has length 17 [2021-05-03 14:10:25,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:25,850 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 537 transitions. [2021-05-03 14:10:25,850 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:25,850 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 537 transitions. [2021-05-03 14:10:25,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:10:25,850 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:25,850 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:26,060 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7212 [2021-05-03 14:10:26,061 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:26,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:26,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1195798685, now seen corresponding path program 75 times [2021-05-03 14:10:26,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:26,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264048370] [2021-05-03 14:10:26,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:26,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:26,110 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:26,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264048370] [2021-05-03 14:10:26,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511574234] [2021-05-03 14:10:26,110 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:26,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:10:26,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:26,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 14:10:26,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:26,189 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:26,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:26,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-05-03 14:10:26,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601940727] [2021-05-03 14:10:26,189 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:10:26,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:26,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:10:26,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:10:26,189 INFO L87 Difference]: Start difference. First operand 189 states and 537 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:26,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:26,261 INFO L93 Difference]: Finished difference Result 377 states and 865 transitions. [2021-05-03 14:10:26,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:10:26,261 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 17 [2021-05-03 14:10:26,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:26,262 INFO L225 Difference]: With dead ends: 377 [2021-05-03 14:10:26,262 INFO L226 Difference]: Without dead ends: 377 [2021-05-03 14:10:26,262 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 62.1ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:10:26,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-05-03 14:10:26,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 197. [2021-05-03 14:10:26,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.8877551020408165) internal successors, (566), 196 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:26,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 566 transitions. [2021-05-03 14:10:26,270 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 566 transitions. Word has length 17 [2021-05-03 14:10:26,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:26,270 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 566 transitions. [2021-05-03 14:10:26,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:26,270 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 566 transitions. [2021-05-03 14:10:26,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:10:26,270 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:26,270 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:26,477 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7400,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:26,477 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:26,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:26,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1733654263, now seen corresponding path program 76 times [2021-05-03 14:10:26,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:26,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095385925] [2021-05-03 14:10:26,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:26,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:26,514 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:26,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095385925] [2021-05-03 14:10:26,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864614469] [2021-05-03 14:10:26,514 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:26,543 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:10:26,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:26,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 14:10:26,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:26,577 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:26,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:26,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-05-03 14:10:26,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797086936] [2021-05-03 14:10:26,578 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:10:26,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:26,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:10:26,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:10:26,578 INFO L87 Difference]: Start difference. First operand 197 states and 566 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:26,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:26,687 INFO L93 Difference]: Finished difference Result 413 states and 931 transitions. [2021-05-03 14:10:26,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:10:26,688 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) 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 17 [2021-05-03 14:10:26,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:26,689 INFO L225 Difference]: With dead ends: 413 [2021-05-03 14:10:26,689 INFO L226 Difference]: Without dead ends: 413 [2021-05-03 14:10:26,689 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 71.5ms TimeCoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:10:26,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-05-03 14:10:26,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 197. [2021-05-03 14:10:26,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.872448979591837) internal successors, (563), 196 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:26,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 563 transitions. [2021-05-03 14:10:26,692 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 563 transitions. Word has length 17 [2021-05-03 14:10:26,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:26,692 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 563 transitions. [2021-05-03 14:10:26,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:26,692 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 563 transitions. [2021-05-03 14:10:26,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:10:26,693 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:26,693 INFO L551 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:26,908 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7401,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:26,908 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:26,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:26,908 INFO L82 PathProgramCache]: Analyzing trace with hash 426443908, now seen corresponding path program 77 times [2021-05-03 14:10:26,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:26,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924737876] [2021-05-03 14:10:26,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:26,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:27,081 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:27,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924737876] [2021-05-03 14:10:27,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690966005] [2021-05-03 14:10:27,081 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 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 [2021-05-03 14:10:27,112 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:10:27,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:27,121 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-03 14:10:27,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:27,380 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:10:27,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-05-03 14:10:27,447 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:10:27,449 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:10:27,449 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:10:27,449 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-05-03 14:10:27,454 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:27,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:27,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-03 14:10:27,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853810801] [2021-05-03 14:10:27,455 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:10:27,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:27,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:10:27,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:10:27,455 INFO L87 Difference]: Start difference. First operand 197 states and 563 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:27,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:27,810 INFO L93 Difference]: Finished difference Result 211 states and 586 transitions. [2021-05-03 14:10:27,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:10:27,810 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) 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 17 [2021-05-03 14:10:27,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:27,811 INFO L225 Difference]: With dead ends: 211 [2021-05-03 14:10:27,811 INFO L226 Difference]: Without dead ends: 202 [2021-05-03 14:10:27,811 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 423.9ms TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:10:27,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-05-03 14:10:27,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 197. [2021-05-03 14:10:27,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.86734693877551) internal successors, (562), 196 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:27,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 562 transitions. [2021-05-03 14:10:27,814 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 562 transitions. Word has length 17 [2021-05-03 14:10:27,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:27,814 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 562 transitions. [2021-05-03 14:10:27,814 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:27,814 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 562 transitions. [2021-05-03 14:10:27,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:10:27,814 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:27,814 INFO L551 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:28,020 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7402,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:28,021 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:28,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:28,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1285318438, now seen corresponding path program 78 times [2021-05-03 14:10:28,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:28,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154440333] [2021-05-03 14:10:28,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:28,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:28,199 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:28,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154440333] [2021-05-03 14:10:28,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341498292] [2021-05-03 14:10:28,200 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:28,225 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:10:28,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:28,225 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-03 14:10:28,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:28,505 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-05-03 14:10:28,506 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:10:28,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 193 [2021-05-03 14:10:28,781 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-05-03 14:10:28,831 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:10:28,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-05-03 14:10:28,891 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:10:28,910 INFO L628 ElimStorePlain]: treesize reduction 27, result has 40.0 percent of original size [2021-05-03 14:10:28,911 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:10:28,911 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:83, output treesize:18 [2021-05-03 14:10:28,940 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:28,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:28,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-03 14:10:28,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234012009] [2021-05-03 14:10:28,940 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:10:28,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:28,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:10:28,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:10:28,941 INFO L87 Difference]: Start difference. First operand 197 states and 562 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:29,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:29,364 INFO L93 Difference]: Finished difference Result 244 states and 655 transitions. [2021-05-03 14:10:29,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 14:10:29,364 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) 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 17 [2021-05-03 14:10:29,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:29,365 INFO L225 Difference]: With dead ends: 244 [2021-05-03 14:10:29,365 INFO L226 Difference]: Without dead ends: 234 [2021-05-03 14:10:29,365 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 470.3ms TimeCoverageRelationStatistics Valid=115, Invalid=755, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:10:29,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-05-03 14:10:29,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 197. [2021-05-03 14:10:29,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.86734693877551) internal successors, (562), 196 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:29,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 562 transitions. [2021-05-03 14:10:29,368 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 562 transitions. Word has length 17 [2021-05-03 14:10:29,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:29,368 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 562 transitions. [2021-05-03 14:10:29,368 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:29,368 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 562 transitions. [2021-05-03 14:10:29,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:10:29,368 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:29,368 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:29,589 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7446 [2021-05-03 14:10:29,589 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:29,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:29,589 INFO L82 PathProgramCache]: Analyzing trace with hash -163096607, now seen corresponding path program 79 times [2021-05-03 14:10:29,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:29,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970332127] [2021-05-03 14:10:29,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:29,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:29,625 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:29,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970332127] [2021-05-03 14:10:29,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732223166] [2021-05-03 14:10:29,625 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:29,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:29,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 14:10:29,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:29,678 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:29,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:29,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-05-03 14:10:29,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771129988] [2021-05-03 14:10:29,678 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:10:29,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:29,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:10:29,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:10:29,679 INFO L87 Difference]: Start difference. First operand 197 states and 562 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:29,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:29,785 INFO L93 Difference]: Finished difference Result 427 states and 977 transitions. [2021-05-03 14:10:29,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:10:29,785 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) 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 17 [2021-05-03 14:10:29,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:29,787 INFO L225 Difference]: With dead ends: 427 [2021-05-03 14:10:29,787 INFO L226 Difference]: Without dead ends: 427 [2021-05-03 14:10:29,787 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 72.2ms TimeCoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:10:29,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-05-03 14:10:29,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 207. [2021-05-03 14:10:29,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 2.907766990291262) internal successors, (599), 206 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:29,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 599 transitions. [2021-05-03 14:10:29,791 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 599 transitions. Word has length 17 [2021-05-03 14:10:29,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:29,791 INFO L480 AbstractCegarLoop]: Abstraction has 207 states and 599 transitions. [2021-05-03 14:10:29,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:29,791 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 599 transitions. [2021-05-03 14:10:29,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:10:29,791 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:29,791 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:29,997 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7642 [2021-05-03 14:10:29,997 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:29,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:29,997 INFO L82 PathProgramCache]: Analyzing trace with hash -669442873, now seen corresponding path program 80 times [2021-05-03 14:10:29,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:29,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670579276] [2021-05-03 14:10:29,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:29,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:30,033 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:30,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670579276] [2021-05-03 14:10:30,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068080856] [2021-05-03 14:10:30,033 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:30,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:10:30,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:30,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 14:10:30,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:30,099 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:30,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:30,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-05-03 14:10:30,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636355177] [2021-05-03 14:10:30,099 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:10:30,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:30,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:10:30,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:10:30,099 INFO L87 Difference]: Start difference. First operand 207 states and 599 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:30,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:30,248 INFO L93 Difference]: Finished difference Result 378 states and 905 transitions. [2021-05-03 14:10:30,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:10:30,248 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) 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 17 [2021-05-03 14:10:30,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:30,249 INFO L225 Difference]: With dead ends: 378 [2021-05-03 14:10:30,249 INFO L226 Difference]: Without dead ends: 378 [2021-05-03 14:10:30,250 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 120.0ms TimeCoverageRelationStatistics Valid=144, Invalid=276, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:10:30,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-05-03 14:10:30,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 204. [2021-05-03 14:10:30,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 2.9014778325123154) internal successors, (589), 203 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:30,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 589 transitions. [2021-05-03 14:10:30,253 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 589 transitions. Word has length 17 [2021-05-03 14:10:30,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:30,253 INFO L480 AbstractCegarLoop]: Abstraction has 204 states and 589 transitions. [2021-05-03 14:10:30,253 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:30,253 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 589 transitions. [2021-05-03 14:10:30,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:10:30,253 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:30,253 INFO L551 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:30,454 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7643 [2021-05-03 14:10:30,454 INFO L428 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:30,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:30,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1756709082, now seen corresponding path program 81 times [2021-05-03 14:10:30,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:30,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36915714] [2021-05-03 14:10:30,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:30,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:30,666 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:30,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36915714] [2021-05-03 14:10:30,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773798027] [2021-05-03 14:10:30,667 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:30,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:10:30,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:30,691 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-03 14:10:30,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:30,945 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:10:30,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-05-03 14:10:31,067 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:10:31,069 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:10:31,069 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:10:31,069 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-05-03 14:10:31,074 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:31,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:31,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-03 14:10:31,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377538618] [2021-05-03 14:10:31,075 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:10:31,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:31,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:10:31,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:10:31,075 INFO L87 Difference]: Start difference. First operand 204 states and 589 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:31,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:31,359 INFO L93 Difference]: Finished difference Result 222 states and 624 transitions. [2021-05-03 14:10:31,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:10:31,359 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) 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 17 [2021-05-03 14:10:31,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:31,360 INFO L225 Difference]: With dead ends: 222 [2021-05-03 14:10:31,360 INFO L226 Difference]: Without dead ends: 213 [2021-05-03 14:10:31,360 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 366.1ms TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:10:31,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-05-03 14:10:31,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 205. [2021-05-03 14:10:31,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.9019607843137254) internal successors, (592), 204 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:31,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 592 transitions. [2021-05-03 14:10:31,362 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 592 transitions. Word has length 17 [2021-05-03 14:10:31,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:31,363 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 592 transitions. [2021-05-03 14:10:31,363 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:31,363 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 592 transitions. [2021-05-03 14:10:31,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:10:31,363 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:31,363 INFO L551 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:31,572 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7644,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:31,573 INFO L428 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:31,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:31,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1679383684, now seen corresponding path program 82 times [2021-05-03 14:10:31,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:31,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491412399] [2021-05-03 14:10:31,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:31,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:31,777 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:31,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491412399] [2021-05-03 14:10:31,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750072637] [2021-05-03 14:10:31,778 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 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 [2021-05-03 14:10:31,797 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:10:31,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:31,798 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-03 14:10:31,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:32,066 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-05-03 14:10:32,067 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:10:32,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 193 [2021-05-03 14:10:32,229 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-05-03 14:10:32,326 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:10:32,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-05-03 14:10:32,461 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:10:32,480 INFO L628 ElimStorePlain]: treesize reduction 27, result has 40.0 percent of original size [2021-05-03 14:10:32,481 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:10:32,481 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:83, output treesize:18 [2021-05-03 14:10:32,510 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:32,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:32,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-03 14:10:32,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119920404] [2021-05-03 14:10:32,510 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:10:32,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:32,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:10:32,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:10:32,511 INFO L87 Difference]: Start difference. First operand 205 states and 592 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:33,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:33,053 INFO L93 Difference]: Finished difference Result 256 states and 697 transitions. [2021-05-03 14:10:33,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 14:10:33,054 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) 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 17 [2021-05-03 14:10:33,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:33,054 INFO L225 Difference]: With dead ends: 256 [2021-05-03 14:10:33,054 INFO L226 Difference]: Without dead ends: 246 [2021-05-03 14:10:33,055 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 435.0ms TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:10:33,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-05-03 14:10:33,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 204. [2021-05-03 14:10:33,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 2.9014778325123154) internal successors, (589), 203 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:33,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 589 transitions. [2021-05-03 14:10:33,057 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 589 transitions. Word has length 17 [2021-05-03 14:10:33,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:33,057 INFO L480 AbstractCegarLoop]: Abstraction has 204 states and 589 transitions. [2021-05-03 14:10:33,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:33,057 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 589 transitions. [2021-05-03 14:10:33,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:10:33,058 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:33,058 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:33,275 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7722,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:33,275 INFO L428 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:33,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:33,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1604794505, now seen corresponding path program 83 times [2021-05-03 14:10:33,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:33,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705661980] [2021-05-03 14:10:33,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:33,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:33,308 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:10:33,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705661980] [2021-05-03 14:10:33,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720709008] [2021-05-03 14:10:33,308 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:33,329 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 14:10:33,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:33,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 14:10:33,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:33,356 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 14:10:33,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:33,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-05-03 14:10:33,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700369039] [2021-05-03 14:10:33,357 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 14:10:33,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:33,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 14:10:33,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:10:33,357 INFO L87 Difference]: Start difference. First operand 204 states and 589 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:33,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:33,408 INFO L93 Difference]: Finished difference Result 345 states and 847 transitions. [2021-05-03 14:10:33,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:10:33,421 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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 17 [2021-05-03 14:10:33,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:33,422 INFO L225 Difference]: With dead ends: 345 [2021-05-03 14:10:33,422 INFO L226 Difference]: Without dead ends: 345 [2021-05-03 14:10:33,422 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 31.7ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:10:33,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-05-03 14:10:33,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 227. [2021-05-03 14:10:33,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.938053097345133) internal successors, (664), 226 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:33,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 664 transitions. [2021-05-03 14:10:33,425 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 664 transitions. Word has length 17 [2021-05-03 14:10:33,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:33,425 INFO L480 AbstractCegarLoop]: Abstraction has 227 states and 664 transitions. [2021-05-03 14:10:33,425 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:33,425 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 664 transitions. [2021-05-03 14:10:33,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:10:33,426 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:33,426 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:33,626 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7883 [2021-05-03 14:10:33,627 INFO L428 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:33,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:33,627 INFO L82 PathProgramCache]: Analyzing trace with hash 629312989, now seen corresponding path program 84 times [2021-05-03 14:10:33,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:33,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990810061] [2021-05-03 14:10:33,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:33,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:33,664 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:33,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990810061] [2021-05-03 14:10:33,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093858304] [2021-05-03 14:10:33,664 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:33,684 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:10:33,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:33,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 14:10:33,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:33,711 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:33,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:33,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-05-03 14:10:33,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515645663] [2021-05-03 14:10:33,712 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:10:33,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:33,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:10:33,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:10:33,712 INFO L87 Difference]: Start difference. First operand 227 states and 664 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:33,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:33,773 INFO L93 Difference]: Finished difference Result 369 states and 882 transitions. [2021-05-03 14:10:33,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 14:10:33,774 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 17 [2021-05-03 14:10:33,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:33,775 INFO L225 Difference]: With dead ends: 369 [2021-05-03 14:10:33,775 INFO L226 Difference]: Without dead ends: 369 [2021-05-03 14:10:33,775 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 46.2ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:10:33,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-05-03 14:10:33,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 215. [2021-05-03 14:10:33,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.911214953271028) internal successors, (623), 214 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:33,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 623 transitions. [2021-05-03 14:10:33,794 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 623 transitions. Word has length 17 [2021-05-03 14:10:33,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:33,794 INFO L480 AbstractCegarLoop]: Abstraction has 215 states and 623 transitions. [2021-05-03 14:10:33,794 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:33,794 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 623 transitions. [2021-05-03 14:10:33,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:10:33,795 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:33,795 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:34,005 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7884 [2021-05-03 14:10:34,005 INFO L428 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:34,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:34,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1167168567, now seen corresponding path program 85 times [2021-05-03 14:10:34,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:34,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426078401] [2021-05-03 14:10:34,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:34,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:34,040 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:34,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426078401] [2021-05-03 14:10:34,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381221417] [2021-05-03 14:10:34,040 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:10:34,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:34,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 14:10:34,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:34,095 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:34,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:34,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-05-03 14:10:34,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730906164] [2021-05-03 14:10:34,096 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:10:34,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:34,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:10:34,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:10:34,096 INFO L87 Difference]: Start difference. First operand 215 states and 623 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:34,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:34,197 INFO L93 Difference]: Finished difference Result 388 states and 893 transitions. [2021-05-03 14:10:34,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:10:34,198 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) 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 17 [2021-05-03 14:10:34,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:34,199 INFO L225 Difference]: With dead ends: 388 [2021-05-03 14:10:34,199 INFO L226 Difference]: Without dead ends: 388 [2021-05-03 14:10:34,199 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 75.3ms TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:10:34,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-05-03 14:10:34,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 204. [2021-05-03 14:10:34,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 2.896551724137931) internal successors, (588), 203 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:34,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 588 transitions. [2021-05-03 14:10:34,210 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 588 transitions. Word has length 17 [2021-05-03 14:10:34,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:34,210 INFO L480 AbstractCegarLoop]: Abstraction has 204 states and 588 transitions. [2021-05-03 14:10:34,211 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:34,211 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 588 transitions. [2021-05-03 14:10:34,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:10:34,212 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:34,212 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:34,427 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7885,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:34,427 INFO L428 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:34,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:34,427 INFO L82 PathProgramCache]: Analyzing trace with hash 660822301, now seen corresponding path program 86 times [2021-05-03 14:10:34,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:34,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412160392] [2021-05-03 14:10:34,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:34,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:34,501 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:34,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412160392] [2021-05-03 14:10:34,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101956162] [2021-05-03 14:10:34,502 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:34,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:10:34,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:34,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 14:10:34,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:34,555 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:34,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:34,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-05-03 14:10:34,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433458396] [2021-05-03 14:10:34,555 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:10:34,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:34,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:10:34,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:10:34,556 INFO L87 Difference]: Start difference. First operand 204 states and 588 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:34,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:34,714 INFO L93 Difference]: Finished difference Result 319 states and 762 transitions. [2021-05-03 14:10:34,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:10:34,714 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) 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 17 [2021-05-03 14:10:34,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:34,715 INFO L225 Difference]: With dead ends: 319 [2021-05-03 14:10:34,715 INFO L226 Difference]: Without dead ends: 319 [2021-05-03 14:10:34,715 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 148.9ms TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:10:34,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-05-03 14:10:34,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 198. [2021-05-03 14:10:34,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.8934010152284264) internal successors, (570), 197 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:34,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 570 transitions. [2021-05-03 14:10:34,719 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 570 transitions. Word has length 17 [2021-05-03 14:10:34,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:34,719 INFO L480 AbstractCegarLoop]: Abstraction has 198 states and 570 transitions. [2021-05-03 14:10:34,719 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:34,719 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 570 transitions. [2021-05-03 14:10:34,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:10:34,719 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:34,719 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:34,924 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7886 [2021-05-03 14:10:34,925 INFO L428 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:34,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:34,925 INFO L82 PathProgramCache]: Analyzing trace with hash 2143957239, now seen corresponding path program 87 times [2021-05-03 14:10:34,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:34,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913133645] [2021-05-03 14:10:34,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:34,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:34,969 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:34,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913133645] [2021-05-03 14:10:34,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021047574] [2021-05-03 14:10:34,969 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 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 [2021-05-03 14:10:34,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:10:34,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:34,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 14:10:34,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:35,023 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:35,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:35,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-05-03 14:10:35,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267663103] [2021-05-03 14:10:35,023 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:10:35,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:35,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:10:35,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:10:35,023 INFO L87 Difference]: Start difference. First operand 198 states and 570 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:35,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:35,194 INFO L93 Difference]: Finished difference Result 345 states and 840 transitions. [2021-05-03 14:10:35,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:10:35,194 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) 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 17 [2021-05-03 14:10:35,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:35,195 INFO L225 Difference]: With dead ends: 345 [2021-05-03 14:10:35,195 INFO L226 Difference]: Without dead ends: 345 [2021-05-03 14:10:35,195 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 136.6ms TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:10:35,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-05-03 14:10:35,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 202. [2021-05-03 14:10:35,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.8955223880597014) internal successors, (582), 201 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:35,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 582 transitions. [2021-05-03 14:10:35,197 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 582 transitions. Word has length 17 [2021-05-03 14:10:35,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:35,198 INFO L480 AbstractCegarLoop]: Abstraction has 202 states and 582 transitions. [2021-05-03 14:10:35,198 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:35,198 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 582 transitions. [2021-05-03 14:10:35,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:10:35,198 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:35,198 INFO L551 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:35,414 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7887,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:35,414 INFO L428 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:35,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:35,414 INFO L82 PathProgramCache]: Analyzing trace with hash 45256516, now seen corresponding path program 88 times [2021-05-03 14:10:35,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:35,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671668407] [2021-05-03 14:10:35,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:35,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:35,594 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:35,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671668407] [2021-05-03 14:10:35,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609765963] [2021-05-03 14:10:35,594 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:35,612 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:10:35,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:35,613 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-03 14:10:35,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:35,870 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:10:35,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-05-03 14:10:35,981 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:10:35,983 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:10:35,983 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:10:35,983 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-05-03 14:10:35,990 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:35,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:35,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-03 14:10:35,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621143069] [2021-05-03 14:10:35,990 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:10:35,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:35,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:10:35,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:10:35,990 INFO L87 Difference]: Start difference. First operand 202 states and 582 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:36,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:36,401 INFO L93 Difference]: Finished difference Result 234 states and 664 transitions. [2021-05-03 14:10:36,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:10:36,401 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) 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 17 [2021-05-03 14:10:36,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:36,402 INFO L225 Difference]: With dead ends: 234 [2021-05-03 14:10:36,402 INFO L226 Difference]: Without dead ends: 225 [2021-05-03 14:10:36,402 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 371.3ms TimeCoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:10:36,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-05-03 14:10:36,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 212. [2021-05-03 14:10:36,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.928909952606635) internal successors, (618), 211 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:36,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 618 transitions. [2021-05-03 14:10:36,404 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 618 transitions. Word has length 17 [2021-05-03 14:10:36,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:36,404 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 618 transitions. [2021-05-03 14:10:36,404 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:36,404 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 618 transitions. [2021-05-03 14:10:36,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:10:36,405 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:36,405 INFO L551 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:36,616 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7888,102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:36,617 INFO L428 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:36,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:36,617 INFO L82 PathProgramCache]: Analyzing trace with hash 904131046, now seen corresponding path program 89 times [2021-05-03 14:10:36,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:36,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814507059] [2021-05-03 14:10:36,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:36,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:36,830 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 23 [2021-05-03 14:10:36,883 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:36,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814507059] [2021-05-03 14:10:36,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640386685] [2021-05-03 14:10:36,884 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:36,965 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 14:10:36,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:36,966 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-03 14:10:36,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:37,282 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-05-03 14:10:37,282 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:10:37,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 193 [2021-05-03 14:10:37,604 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-05-03 14:10:37,663 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:10:37,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-05-03 14:10:37,824 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:10:37,846 INFO L628 ElimStorePlain]: treesize reduction 27, result has 40.0 percent of original size [2021-05-03 14:10:37,847 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:10:37,847 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:83, output treesize:18 [2021-05-03 14:10:37,878 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:37,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:37,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-03 14:10:37,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656241461] [2021-05-03 14:10:37,879 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:10:37,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:37,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:10:37,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:10:37,879 INFO L87 Difference]: Start difference. First operand 212 states and 618 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:38,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:38,341 INFO L93 Difference]: Finished difference Result 272 states and 753 transitions. [2021-05-03 14:10:38,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 14:10:38,341 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) 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 17 [2021-05-03 14:10:38,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:38,342 INFO L225 Difference]: With dead ends: 272 [2021-05-03 14:10:38,342 INFO L226 Difference]: Without dead ends: 262 [2021-05-03 14:10:38,342 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 547.7ms TimeCoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:10:38,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-05-03 14:10:38,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 212. [2021-05-03 14:10:38,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.933649289099526) internal successors, (619), 211 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:38,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 619 transitions. [2021-05-03 14:10:38,347 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 619 transitions. Word has length 17 [2021-05-03 14:10:38,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:38,347 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 619 transitions. [2021-05-03 14:10:38,347 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:38,347 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 619 transitions. [2021-05-03 14:10:38,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:10:38,347 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:38,347 INFO L551 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:38,561 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7950,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:38,561 INFO L428 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:38,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:38,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1680222942, now seen corresponding path program 90 times [2021-05-03 14:10:38,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:38,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503788785] [2021-05-03 14:10:38,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:38,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:38,715 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:38,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503788785] [2021-05-03 14:10:38,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138248325] [2021-05-03 14:10:38,716 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:38,735 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:10:38,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:38,736 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-03 14:10:38,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:39,032 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:10:39,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 193 [2021-05-03 14:10:39,241 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-05-03 14:10:39,298 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:10:39,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-05-03 14:10:39,417 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:10:39,436 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-05-03 14:10:39,437 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:10:39,437 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:83, output treesize:18 [2021-05-03 14:10:39,466 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:39,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:39,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-03 14:10:39,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779399951] [2021-05-03 14:10:39,466 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:10:39,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:39,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:10:39,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:10:39,467 INFO L87 Difference]: Start difference. First operand 212 states and 619 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:39,823 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-05-03 14:10:40,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:40,379 INFO L93 Difference]: Finished difference Result 304 states and 812 transitions. [2021-05-03 14:10:40,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-03 14:10:40,380 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) 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 17 [2021-05-03 14:10:40,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:40,380 INFO L225 Difference]: With dead ends: 304 [2021-05-03 14:10:40,380 INFO L226 Difference]: Without dead ends: 294 [2021-05-03 14:10:40,381 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 793.6ms TimeCoverageRelationStatistics Valid=191, Invalid=1291, Unknown=0, NotChecked=0, Total=1482 [2021-05-03 14:10:40,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-05-03 14:10:40,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 213. [2021-05-03 14:10:40,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.938679245283019) internal successors, (623), 212 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:40,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 623 transitions. [2021-05-03 14:10:40,393 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 623 transitions. Word has length 17 [2021-05-03 14:10:40,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:40,393 INFO L480 AbstractCegarLoop]: Abstraction has 213 states and 623 transitions. [2021-05-03 14:10:40,393 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:40,393 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 623 transitions. [2021-05-03 14:10:40,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:10:40,393 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:40,393 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:40,605 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8166 [2021-05-03 14:10:40,605 INFO L428 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:40,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:40,606 INFO L82 PathProgramCache]: Analyzing trace with hash 978720225, now seen corresponding path program 91 times [2021-05-03 14:10:40,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:40,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487858792] [2021-05-03 14:10:40,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:40,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:40,677 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:40,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487858792] [2021-05-03 14:10:40,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681439699] [2021-05-03 14:10:40,678 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:10:40,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:40,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 14:10:40,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:40,742 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:40,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:40,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-05-03 14:10:40,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341993310] [2021-05-03 14:10:40,743 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:10:40,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:40,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:10:40,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:10:40,743 INFO L87 Difference]: Start difference. First operand 213 states and 623 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:40,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:40,795 INFO L93 Difference]: Finished difference Result 364 states and 870 transitions. [2021-05-03 14:10:40,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 14:10:40,796 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:10:40,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:40,796 INFO L225 Difference]: With dead ends: 364 [2021-05-03 14:10:40,796 INFO L226 Difference]: Without dead ends: 364 [2021-05-03 14:10:40,796 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 52.3ms TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:10:40,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-05-03 14:10:40,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 220. [2021-05-03 14:10:40,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.954337899543379) internal successors, (647), 219 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:40,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 647 transitions. [2021-05-03 14:10:40,799 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 647 transitions. Word has length 17 [2021-05-03 14:10:40,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:40,799 INFO L480 AbstractCegarLoop]: Abstraction has 220 states and 647 transitions. [2021-05-03 14:10:40,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:40,799 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 647 transitions. [2021-05-03 14:10:40,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:10:40,800 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:40,800 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:41,008 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8364 [2021-05-03 14:10:41,008 INFO L428 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:41,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:41,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1082139577, now seen corresponding path program 92 times [2021-05-03 14:10:41,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:41,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091416316] [2021-05-03 14:10:41,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:41,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:41,072 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:41,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091416316] [2021-05-03 14:10:41,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270285626] [2021-05-03 14:10:41,072 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:41,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:10:41,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:41,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 14:10:41,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:41,119 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:10:41,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:41,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-05-03 14:10:41,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084453788] [2021-05-03 14:10:41,119 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:10:41,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:41,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:10:41,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:10:41,120 INFO L87 Difference]: Start difference. First operand 220 states and 647 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:41,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:41,170 INFO L93 Difference]: Finished difference Result 346 states and 892 transitions. [2021-05-03 14:10:41,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:10:41,171 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:10:41,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:41,171 INFO L225 Difference]: With dead ends: 346 [2021-05-03 14:10:41,171 INFO L226 Difference]: Without dead ends: 346 [2021-05-03 14:10:41,172 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 45.7ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:10:41,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-05-03 14:10:41,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 250. [2021-05-03 14:10:41,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.9759036144578315) internal successors, (741), 249 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:41,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 741 transitions. [2021-05-03 14:10:41,174 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 741 transitions. Word has length 17 [2021-05-03 14:10:41,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:41,175 INFO L480 AbstractCegarLoop]: Abstraction has 250 states and 741 transitions. [2021-05-03 14:10:41,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:41,175 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 741 transitions. [2021-05-03 14:10:41,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:10:41,175 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:41,175 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:41,389 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8365 [2021-05-03 14:10:41,389 INFO L428 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:41,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:41,389 INFO L82 PathProgramCache]: Analyzing trace with hash -544283999, now seen corresponding path program 93 times [2021-05-03 14:10:41,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:41,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837150592] [2021-05-03 14:10:41,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:41,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:41,432 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:41,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837150592] [2021-05-03 14:10:41,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41477804] [2021-05-03 14:10:41,433 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:41,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 14:10:41,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:41,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 14:10:41,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:41,486 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:41,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:41,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-05-03 14:10:41,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361093691] [2021-05-03 14:10:41,487 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:10:41,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:41,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:10:41,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:10:41,487 INFO L87 Difference]: Start difference. First operand 250 states and 741 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:41,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:41,575 INFO L93 Difference]: Finished difference Result 372 states and 930 transitions. [2021-05-03 14:10:41,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:10:41,575 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:10:41,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:41,576 INFO L225 Difference]: With dead ends: 372 [2021-05-03 14:10:41,576 INFO L226 Difference]: Without dead ends: 372 [2021-05-03 14:10:41,576 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 68.4ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:10:41,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-05-03 14:10:41,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 247. [2021-05-03 14:10:41,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.9715447154471546) internal successors, (731), 246 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:41,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 731 transitions. [2021-05-03 14:10:41,579 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 731 transitions. Word has length 17 [2021-05-03 14:10:41,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:41,579 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 731 transitions. [2021-05-03 14:10:41,579 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:41,579 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 731 transitions. [2021-05-03 14:10:41,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:10:41,580 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:41,580 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:41,780 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8366,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:41,780 INFO L428 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:41,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:41,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1050630265, now seen corresponding path program 94 times [2021-05-03 14:10:41,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:41,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424197924] [2021-05-03 14:10:41,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:41,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:41,826 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:41,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424197924] [2021-05-03 14:10:41,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44281445] [2021-05-03 14:10:41,826 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:41,845 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:10:41,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:41,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 14:10:41,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:41,878 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:41,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:41,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-05-03 14:10:41,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461850976] [2021-05-03 14:10:41,878 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:10:41,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:41,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:10:41,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:10:41,879 INFO L87 Difference]: Start difference. First operand 247 states and 731 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:42,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:42,008 INFO L93 Difference]: Finished difference Result 335 states and 866 transitions. [2021-05-03 14:10:42,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:10:42,009 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:10:42,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:42,009 INFO L225 Difference]: With dead ends: 335 [2021-05-03 14:10:42,009 INFO L226 Difference]: Without dead ends: 335 [2021-05-03 14:10:42,009 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 100.0ms TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:10:42,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-05-03 14:10:42,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 244. [2021-05-03 14:10:42,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 2.97119341563786) internal successors, (722), 243 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:42,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 722 transitions. [2021-05-03 14:10:42,012 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 722 transitions. Word has length 17 [2021-05-03 14:10:42,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:42,012 INFO L480 AbstractCegarLoop]: Abstraction has 244 states and 722 transitions. [2021-05-03 14:10:42,012 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:42,012 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 722 transitions. [2021-05-03 14:10:42,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:10:42,013 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:42,013 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:42,228 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8367 [2021-05-03 14:10:42,228 INFO L428 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:42,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:42,228 INFO L82 PathProgramCache]: Analyzing trace with hash 432504673, now seen corresponding path program 95 times [2021-05-03 14:10:42,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:42,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950690611] [2021-05-03 14:10:42,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:42,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:42,269 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:42,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950690611] [2021-05-03 14:10:42,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023466051] [2021-05-03 14:10:42,269 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:42,288 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 14:10:42,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:42,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 14:10:42,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:42,324 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:42,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:42,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-05-03 14:10:42,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127839504] [2021-05-03 14:10:42,324 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:10:42,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:42,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:10:42,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:10:42,325 INFO L87 Difference]: Start difference. First operand 244 states and 722 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:42,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:42,474 INFO L93 Difference]: Finished difference Result 346 states and 896 transitions. [2021-05-03 14:10:42,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:10:42,475 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:10:42,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:42,475 INFO L225 Difference]: With dead ends: 346 [2021-05-03 14:10:42,475 INFO L226 Difference]: Without dead ends: 346 [2021-05-03 14:10:42,476 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 123.8ms TimeCoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:10:42,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-05-03 14:10:42,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 244. [2021-05-03 14:10:42,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 2.97119341563786) internal successors, (722), 243 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:42,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 722 transitions. [2021-05-03 14:10:42,478 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 722 transitions. Word has length 17 [2021-05-03 14:10:42,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:42,478 INFO L480 AbstractCegarLoop]: Abstraction has 244 states and 722 transitions. [2021-05-03 14:10:42,478 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:42,478 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 722 transitions. [2021-05-03 14:10:42,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:10:42,479 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:42,479 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:42,692 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8368,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:42,693 INFO L428 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:42,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:42,693 INFO L82 PathProgramCache]: Analyzing trace with hash -834952505, now seen corresponding path program 96 times [2021-05-03 14:10:42,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:42,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645587772] [2021-05-03 14:10:42,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:42,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:42,745 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:42,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645587772] [2021-05-03 14:10:42,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461359633] [2021-05-03 14:10:42,745 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 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:42,764 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:10:42,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:42,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 14:10:42,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:42,802 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:42,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:42,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-05-03 14:10:42,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924158115] [2021-05-03 14:10:42,803 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:10:42,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:42,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:10:42,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:10:42,803 INFO L87 Difference]: Start difference. First operand 244 states and 722 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:42,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:42,940 INFO L93 Difference]: Finished difference Result 385 states and 1019 transitions. [2021-05-03 14:10:42,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:10:42,940 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:10:42,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:42,941 INFO L225 Difference]: With dead ends: 385 [2021-05-03 14:10:42,941 INFO L226 Difference]: Without dead ends: 385 [2021-05-03 14:10:42,941 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 127.1ms TimeCoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:10:42,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2021-05-03 14:10:42,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 252. [2021-05-03 14:10:42,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.9721115537848606) internal successors, (746), 251 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:42,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 746 transitions. [2021-05-03 14:10:42,944 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 746 transitions. Word has length 17 [2021-05-03 14:10:42,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:42,944 INFO L480 AbstractCegarLoop]: Abstraction has 252 states and 746 transitions. [2021-05-03 14:10:42,944 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:42,944 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 746 transitions. [2021-05-03 14:10:42,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:10:42,944 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:42,944 INFO L551 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:43,160 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8369 [2021-05-03 14:10:43,161 INFO L428 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:43,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:43,161 INFO L82 PathProgramCache]: Analyzing trace with hash -702501620, now seen corresponding path program 97 times [2021-05-03 14:10:43,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:43,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457048864] [2021-05-03 14:10:43,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:43,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:43,247 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:43,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457048864] [2021-05-03 14:10:43,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736267053] [2021-05-03 14:10:43,247 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:43,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:43,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-03 14:10:43,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:43,573 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:10:43,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-05-03 14:10:44,080 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:10:44,081 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:10:44,081 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:10:44,081 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-05-03 14:10:44,093 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:44,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:44,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-03 14:10:44,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62495364] [2021-05-03 14:10:44,094 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:10:44,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:44,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:10:44,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:10:44,094 INFO L87 Difference]: Start difference. First operand 252 states and 746 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:44,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:44,390 INFO L93 Difference]: Finished difference Result 306 states and 891 transitions. [2021-05-03 14:10:44,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:10:44,390 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:10:44,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:44,391 INFO L225 Difference]: With dead ends: 306 [2021-05-03 14:10:44,391 INFO L226 Difference]: Without dead ends: 301 [2021-05-03 14:10:44,391 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 308.7ms TimeCoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:10:44,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-05-03 14:10:44,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 272. [2021-05-03 14:10:44,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 2.992619926199262) internal successors, (811), 271 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:44,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 811 transitions. [2021-05-03 14:10:44,394 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 811 transitions. Word has length 18 [2021-05-03 14:10:44,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:44,394 INFO L480 AbstractCegarLoop]: Abstraction has 272 states and 811 transitions. [2021-05-03 14:10:44,394 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:44,394 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 811 transitions. [2021-05-03 14:10:44,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:10:44,395 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:44,395 INFO L551 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:44,595 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8370,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:44,595 INFO L428 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:44,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:44,596 INFO L82 PathProgramCache]: Analyzing trace with hash -1857651606, now seen corresponding path program 98 times [2021-05-03 14:10:44,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:44,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021142800] [2021-05-03 14:10:44,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:44,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:44,765 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:44,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021142800] [2021-05-03 14:10:44,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532556088] [2021-05-03 14:10:44,765 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:44,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:10:44,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:44,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-03 14:10:44,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:45,083 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:10:45,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-05-03 14:10:45,304 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:10:45,305 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:10:45,306 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:10:45,306 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-05-03 14:10:45,317 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:45,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:45,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-03 14:10:45,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892338794] [2021-05-03 14:10:45,318 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:10:45,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:45,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:10:45,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:10:45,318 INFO L87 Difference]: Start difference. First operand 272 states and 811 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:46,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:46,028 INFO L93 Difference]: Finished difference Result 402 states and 1031 transitions. [2021-05-03 14:10:46,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-03 14:10:46,028 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:10:46,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:46,029 INFO L225 Difference]: With dead ends: 402 [2021-05-03 14:10:46,029 INFO L226 Difference]: Without dead ends: 392 [2021-05-03 14:10:46,029 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 532.4ms TimeCoverageRelationStatistics Valid=142, Invalid=1264, Unknown=0, NotChecked=0, Total=1406 [2021-05-03 14:10:46,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-05-03 14:10:46,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 272. [2021-05-03 14:10:46,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 2.992619926199262) internal successors, (811), 271 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:46,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 811 transitions. [2021-05-03 14:10:46,032 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 811 transitions. Word has length 18 [2021-05-03 14:10:46,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:46,032 INFO L480 AbstractCegarLoop]: Abstraction has 272 states and 811 transitions. [2021-05-03 14:10:46,032 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:46,032 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 811 transitions. [2021-05-03 14:10:46,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:10:46,033 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:46,033 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:46,249 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8586 [2021-05-03 14:10:46,249 INFO L428 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:46,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:46,249 INFO L82 PathProgramCache]: Analyzing trace with hash 801291561, now seen corresponding path program 99 times [2021-05-03 14:10:46,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:46,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435363562] [2021-05-03 14:10:46,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:46,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:46,325 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:46,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435363562] [2021-05-03 14:10:46,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737197470] [2021-05-03 14:10:46,325 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:10:46,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:10:46,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:46,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:10:46,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:46,445 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:46,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:46,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-05-03 14:10:46,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831280282] [2021-05-03 14:10:46,446 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:10:46,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:46,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:10:46,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:10:46,446 INFO L87 Difference]: Start difference. First operand 272 states and 811 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:46,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:46,524 INFO L93 Difference]: Finished difference Result 460 states and 1135 transitions. [2021-05-03 14:10:46,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:10:46,525 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 18 [2021-05-03 14:10:46,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:46,525 INFO L225 Difference]: With dead ends: 460 [2021-05-03 14:10:46,525 INFO L226 Difference]: Without dead ends: 460 [2021-05-03 14:10:46,526 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 66.3ms TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:10:46,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-05-03 14:10:46,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 274. [2021-05-03 14:10:46,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 2.9963369963369964) internal successors, (818), 273 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:46,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 818 transitions. [2021-05-03 14:10:46,529 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 818 transitions. Word has length 18 [2021-05-03 14:10:46,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:46,529 INFO L480 AbstractCegarLoop]: Abstraction has 274 states and 818 transitions. [2021-05-03 14:10:46,529 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:46,529 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 818 transitions. [2021-05-03 14:10:46,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:10:46,530 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:46,530 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:46,744 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8693 [2021-05-03 14:10:46,744 INFO L428 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:46,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:46,745 INFO L82 PathProgramCache]: Analyzing trace with hash -640313607, now seen corresponding path program 100 times [2021-05-03 14:10:46,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:46,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41222308] [2021-05-03 14:10:46,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:46,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:46,782 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:46,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41222308] [2021-05-03 14:10:46,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076143449] [2021-05-03 14:10:46,783 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 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 [2021-05-03 14:10:46,800 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:10:46,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:46,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:10:46,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:46,836 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:46,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:46,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-05-03 14:10:46,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489317685] [2021-05-03 14:10:46,837 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:10:46,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:46,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:10:46,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:10:46,837 INFO L87 Difference]: Start difference. First operand 274 states and 818 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:46,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:46,910 INFO L93 Difference]: Finished difference Result 492 states and 1194 transitions. [2021-05-03 14:10:46,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:10:46,910 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 18 [2021-05-03 14:10:46,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:46,911 INFO L225 Difference]: With dead ends: 492 [2021-05-03 14:10:46,911 INFO L226 Difference]: Without dead ends: 492 [2021-05-03 14:10:46,911 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 54.1ms TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:10:46,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2021-05-03 14:10:46,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 276. [2021-05-03 14:10:46,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 3.0) internal successors, (825), 275 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:46,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 825 transitions. [2021-05-03 14:10:46,914 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 825 transitions. Word has length 18 [2021-05-03 14:10:46,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:46,914 INFO L480 AbstractCegarLoop]: Abstraction has 276 states and 825 transitions. [2021-05-03 14:10:46,915 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:46,915 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 825 transitions. [2021-05-03 14:10:46,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:10:46,915 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:46,915 INFO L551 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:47,115 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8694 [2021-05-03 14:10:47,116 INFO L428 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:47,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:47,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1790860340, now seen corresponding path program 101 times [2021-05-03 14:10:47,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:47,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153578204] [2021-05-03 14:10:47,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:47,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:47,239 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:47,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153578204] [2021-05-03 14:10:47,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705145635] [2021-05-03 14:10:47,239 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:47,258 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 14:10:47,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:47,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-03 14:10:47,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:47,527 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:10:47,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-05-03 14:10:47,743 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:10:47,744 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:10:47,744 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:10:47,744 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-05-03 14:10:47,749 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:47,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:47,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-03 14:10:47,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929101522] [2021-05-03 14:10:47,750 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:10:47,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:47,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:10:47,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:10:47,750 INFO L87 Difference]: Start difference. First operand 276 states and 825 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:48,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:48,014 INFO L93 Difference]: Finished difference Result 323 states and 904 transitions. [2021-05-03 14:10:48,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:10:48,014 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:10:48,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:48,015 INFO L225 Difference]: With dead ends: 323 [2021-05-03 14:10:48,015 INFO L226 Difference]: Without dead ends: 318 [2021-05-03 14:10:48,015 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 311.4ms TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:10:48,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-05-03 14:10:48,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 276. [2021-05-03 14:10:48,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 3.0) internal successors, (825), 275 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:48,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 825 transitions. [2021-05-03 14:10:48,018 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 825 transitions. Word has length 18 [2021-05-03 14:10:48,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:48,019 INFO L480 AbstractCegarLoop]: Abstraction has 276 states and 825 transitions. [2021-05-03 14:10:48,019 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:48,019 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 825 transitions. [2021-05-03 14:10:48,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:10:48,019 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:48,019 INFO L551 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:48,235 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8695,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:48,235 INFO L428 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:48,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:48,235 INFO L82 PathProgramCache]: Analyzing trace with hash -2026934802, now seen corresponding path program 102 times [2021-05-03 14:10:48,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:48,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719716089] [2021-05-03 14:10:48,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:48,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:48,313 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:48,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719716089] [2021-05-03 14:10:48,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406032189] [2021-05-03 14:10:48,314 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:10:48,341 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:10:48,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:48,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-03 14:10:48,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:48,680 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:10:48,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-05-03 14:10:48,913 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:10:48,914 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:10:48,914 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:10:48,915 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-05-03 14:10:48,922 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:48,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:48,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-03 14:10:48,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287225818] [2021-05-03 14:10:48,922 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:10:48,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:48,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:10:48,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:10:48,922 INFO L87 Difference]: Start difference. First operand 276 states and 825 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:49,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:49,315 INFO L93 Difference]: Finished difference Result 333 states and 930 transitions. [2021-05-03 14:10:49,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:10:49,315 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:10:49,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:49,316 INFO L225 Difference]: With dead ends: 333 [2021-05-03 14:10:49,316 INFO L226 Difference]: Without dead ends: 322 [2021-05-03 14:10:49,316 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 377.3ms TimeCoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:10:49,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-05-03 14:10:49,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 278. [2021-05-03 14:10:49,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 2.9819494584837547) internal successors, (826), 277 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:49,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 826 transitions. [2021-05-03 14:10:49,319 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 826 transitions. Word has length 18 [2021-05-03 14:10:49,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:49,319 INFO L480 AbstractCegarLoop]: Abstraction has 278 states and 826 transitions. [2021-05-03 14:10:49,319 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:49,319 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 826 transitions. [2021-05-03 14:10:49,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:10:49,319 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:49,319 INFO L551 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:49,520 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8804 [2021-05-03 14:10:49,520 INFO L428 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:49,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:49,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1194947114, now seen corresponding path program 103 times [2021-05-03 14:10:49,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:49,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231316521] [2021-05-03 14:10:49,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:49,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:49,602 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:49,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231316521] [2021-05-03 14:10:49,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862008101] [2021-05-03 14:10:49,602 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:49,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:49,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-03 14:10:49,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:49,925 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:10:49,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-05-03 14:10:50,294 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:10:50,295 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:10:50,295 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:10:50,295 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-05-03 14:10:50,304 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:50,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:50,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-03 14:10:50,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789225513] [2021-05-03 14:10:50,305 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:10:50,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:50,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:10:50,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:10:50,305 INFO L87 Difference]: Start difference. First operand 278 states and 826 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:50,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:50,848 INFO L93 Difference]: Finished difference Result 351 states and 960 transitions. [2021-05-03 14:10:50,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 14:10:50,848 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:10:50,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:50,849 INFO L225 Difference]: With dead ends: 351 [2021-05-03 14:10:50,849 INFO L226 Difference]: Without dead ends: 338 [2021-05-03 14:10:50,849 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 388.2ms TimeCoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:10:50,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-05-03 14:10:50,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 280. [2021-05-03 14:10:50,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 2.967741935483871) internal successors, (828), 279 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:50,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 828 transitions. [2021-05-03 14:10:50,852 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 828 transitions. Word has length 18 [2021-05-03 14:10:50,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:50,852 INFO L480 AbstractCegarLoop]: Abstraction has 280 states and 828 transitions. [2021-05-03 14:10:50,852 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:50,852 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 828 transitions. [2021-05-03 14:10:50,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:10:50,853 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:50,853 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:51,053 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8913,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:51,053 INFO L428 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:51,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:51,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1914566441, now seen corresponding path program 104 times [2021-05-03 14:10:51,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:51,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632992142] [2021-05-03 14:10:51,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:51,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:51,136 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:51,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632992142] [2021-05-03 14:10:51,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033098408] [2021-05-03 14:10:51,136 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:51,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:10:51,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:51,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:10:51,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:51,187 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:51,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:51,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-05-03 14:10:51,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578042387] [2021-05-03 14:10:51,188 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:10:51,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:51,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:10:51,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:10:51,188 INFO L87 Difference]: Start difference. First operand 280 states and 828 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:51,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:51,294 INFO L93 Difference]: Finished difference Result 527 states and 1263 transitions. [2021-05-03 14:10:51,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:10:51,294 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 18 [2021-05-03 14:10:51,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:51,295 INFO L225 Difference]: With dead ends: 527 [2021-05-03 14:10:51,295 INFO L226 Difference]: Without dead ends: 527 [2021-05-03 14:10:51,295 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 93.1ms TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:10:51,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2021-05-03 14:10:51,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 280. [2021-05-03 14:10:51,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 2.967741935483871) internal successors, (828), 279 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:51,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 828 transitions. [2021-05-03 14:10:51,299 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 828 transitions. Word has length 18 [2021-05-03 14:10:51,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:51,299 INFO L480 AbstractCegarLoop]: Abstraction has 280 states and 828 transitions. [2021-05-03 14:10:51,299 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:51,299 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 828 transitions. [2021-05-03 14:10:51,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:10:51,299 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:51,299 INFO L551 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:51,500 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9108,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:51,501 INFO L428 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:51,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:51,501 INFO L82 PathProgramCache]: Analyzing trace with hash 607356086, now seen corresponding path program 105 times [2021-05-03 14:10:51,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:51,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216444339] [2021-05-03 14:10:51,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:51,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:51,607 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:51,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216444339] [2021-05-03 14:10:51,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267634080] [2021-05-03 14:10:51,608 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:51,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 14:10:51,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:51,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-03 14:10:51,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:51,977 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:10:51,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-05-03 14:10:52,433 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:10:52,434 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:10:52,435 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:10:52,435 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-05-03 14:10:52,440 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:52,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:52,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-03 14:10:52,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540389350] [2021-05-03 14:10:52,440 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:10:52,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:52,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:10:52,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:10:52,441 INFO L87 Difference]: Start difference. First operand 280 states and 828 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:52,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:52,658 INFO L93 Difference]: Finished difference Result 307 states and 875 transitions. [2021-05-03 14:10:52,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:10:52,658 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:10:52,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:52,659 INFO L225 Difference]: With dead ends: 307 [2021-05-03 14:10:52,659 INFO L226 Difference]: Without dead ends: 302 [2021-05-03 14:10:52,659 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 291.8ms TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:10:52,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-05-03 14:10:52,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 280. [2021-05-03 14:10:52,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 2.967741935483871) internal successors, (828), 279 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:52,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 828 transitions. [2021-05-03 14:10:52,662 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 828 transitions. Word has length 18 [2021-05-03 14:10:52,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:52,662 INFO L480 AbstractCegarLoop]: Abstraction has 280 states and 828 transitions. [2021-05-03 14:10:52,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:52,662 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 828 transitions. [2021-05-03 14:10:52,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:10:52,662 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:52,662 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:52,863 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9109 [2021-05-03 14:10:52,863 INFO L428 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:52,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:52,863 INFO L82 PathProgramCache]: Analyzing trace with hash -520040007, now seen corresponding path program 106 times [2021-05-03 14:10:52,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:52,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725134278] [2021-05-03 14:10:52,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:52,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:52,918 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:52,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725134278] [2021-05-03 14:10:52,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490400014] [2021-05-03 14:10:52,919 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 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 [2021-05-03 14:10:52,946 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:10:52,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:52,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:10:52,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:52,982 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:10:52,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:52,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-05-03 14:10:52,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386471756] [2021-05-03 14:10:52,982 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:10:52,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:52,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:10:52,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:10:52,983 INFO L87 Difference]: Start difference. First operand 280 states and 828 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:53,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:53,046 INFO L93 Difference]: Finished difference Result 474 states and 1151 transitions. [2021-05-03 14:10:53,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:10:53,046 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 18 [2021-05-03 14:10:53,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:53,047 INFO L225 Difference]: With dead ends: 474 [2021-05-03 14:10:53,047 INFO L226 Difference]: Without dead ends: 474 [2021-05-03 14:10:53,047 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 45.2ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:10:53,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-05-03 14:10:53,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 291. [2021-05-03 14:10:53,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.986206896551724) internal successors, (866), 290 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:53,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 866 transitions. [2021-05-03 14:10:53,050 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 866 transitions. Word has length 18 [2021-05-03 14:10:53,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:53,050 INFO L480 AbstractCegarLoop]: Abstraction has 291 states and 866 transitions. [2021-05-03 14:10:53,050 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:53,050 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 866 transitions. [2021-05-03 14:10:53,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:10:53,051 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:53,051 INFO L551 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:53,251 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9311,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:53,251 INFO L428 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:53,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:53,252 INFO L82 PathProgramCache]: Analyzing trace with hash -701803756, now seen corresponding path program 107 times [2021-05-03 14:10:53,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:53,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628254401] [2021-05-03 14:10:53,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:53,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:53,336 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:53,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628254401] [2021-05-03 14:10:53,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345629678] [2021-05-03 14:10:53,336 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:53,355 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 14:10:53,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:53,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-03 14:10:53,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:53,641 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:10:53,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-05-03 14:10:53,870 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:10:53,871 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:10:53,872 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:10:53,872 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-05-03 14:10:53,878 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:53,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:53,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-03 14:10:53,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209581403] [2021-05-03 14:10:53,878 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:10:53,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:53,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:10:53,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:10:53,879 INFO L87 Difference]: Start difference. First operand 291 states and 866 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:54,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:54,347 INFO L93 Difference]: Finished difference Result 373 states and 1019 transitions. [2021-05-03 14:10:54,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 14:10:54,348 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:10:54,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:54,349 INFO L225 Difference]: With dead ends: 373 [2021-05-03 14:10:54,349 INFO L226 Difference]: Without dead ends: 356 [2021-05-03 14:10:54,349 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 348.1ms TimeCoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:10:54,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-05-03 14:10:54,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 291. [2021-05-03 14:10:54,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.9689655172413794) internal successors, (861), 290 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:54,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 861 transitions. [2021-05-03 14:10:54,352 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 861 transitions. Word has length 18 [2021-05-03 14:10:54,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:54,352 INFO L480 AbstractCegarLoop]: Abstraction has 291 states and 861 transitions. [2021-05-03 14:10:54,352 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:54,352 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 861 transitions. [2021-05-03 14:10:54,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:10:54,352 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:54,353 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:54,565 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9312 [2021-05-03 14:10:54,565 INFO L428 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:54,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:54,565 INFO L82 PathProgramCache]: Analyzing trace with hash 17815571, now seen corresponding path program 108 times [2021-05-03 14:10:54,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:54,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041934063] [2021-05-03 14:10:54,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:54,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:54,615 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:54,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041934063] [2021-05-03 14:10:54,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774315414] [2021-05-03 14:10:54,616 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:54,648 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:10:54,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:54,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:10:54,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:54,687 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:54,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:54,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-05-03 14:10:54,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511013186] [2021-05-03 14:10:54,687 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:10:54,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:54,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:10:54,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:10:54,687 INFO L87 Difference]: Start difference. First operand 291 states and 861 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:54,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:54,784 INFO L93 Difference]: Finished difference Result 514 states and 1221 transitions. [2021-05-03 14:10:54,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:10:54,785 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 18 [2021-05-03 14:10:54,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:54,786 INFO L225 Difference]: With dead ends: 514 [2021-05-03 14:10:54,786 INFO L226 Difference]: Without dead ends: 514 [2021-05-03 14:10:54,786 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 73.7ms TimeCoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:10:54,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-05-03 14:10:54,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 280. [2021-05-03 14:10:54,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 2.949820788530466) internal successors, (823), 279 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:54,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 823 transitions. [2021-05-03 14:10:54,789 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 823 transitions. Word has length 18 [2021-05-03 14:10:54,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:54,790 INFO L480 AbstractCegarLoop]: Abstraction has 280 states and 823 transitions. [2021-05-03 14:10:54,790 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:54,790 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 823 transitions. [2021-05-03 14:10:54,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:10:54,790 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:54,790 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:55,005 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9455 [2021-05-03 14:10:55,005 INFO L428 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:55,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:55,005 INFO L82 PathProgramCache]: Analyzing trace with hash -488530695, now seen corresponding path program 109 times [2021-05-03 14:10:55,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:55,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673955080] [2021-05-03 14:10:55,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:55,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:55,050 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:55,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673955080] [2021-05-03 14:10:55,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146911522] [2021-05-03 14:10:55,050 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:55,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:55,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:10:55,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:55,104 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:55,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:55,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-05-03 14:10:55,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290602415] [2021-05-03 14:10:55,104 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:10:55,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:55,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:10:55,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:10:55,104 INFO L87 Difference]: Start difference. First operand 280 states and 823 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:55,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:55,256 INFO L93 Difference]: Finished difference Result 554 states and 1291 transitions. [2021-05-03 14:10:55,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:10:55,257 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) 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 18 [2021-05-03 14:10:55,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:55,257 INFO L225 Difference]: With dead ends: 554 [2021-05-03 14:10:55,257 INFO L226 Difference]: Without dead ends: 554 [2021-05-03 14:10:55,258 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 109.5ms TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:10:55,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-05-03 14:10:55,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 283. [2021-05-03 14:10:55,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 2.9397163120567376) internal successors, (829), 282 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:55,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 829 transitions. [2021-05-03 14:10:55,261 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 829 transitions. Word has length 18 [2021-05-03 14:10:55,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:55,261 INFO L480 AbstractCegarLoop]: Abstraction has 283 states and 829 transitions. [2021-05-03 14:10:55,261 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:55,261 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 829 transitions. [2021-05-03 14:10:55,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:10:55,262 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:55,262 INFO L551 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:55,462 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9456,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:55,462 INFO L428 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:55,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:55,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1937621260, now seen corresponding path program 110 times [2021-05-03 14:10:55,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:55,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534889850] [2021-05-03 14:10:55,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:55,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:55,574 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:55,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534889850] [2021-05-03 14:10:55,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922073821] [2021-05-03 14:10:55,575 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:55,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:10:55,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:55,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-03 14:10:55,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:55,865 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:10:55,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-05-03 14:10:56,117 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:10:56,121 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:10:56,122 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:10:56,122 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-05-03 14:10:56,127 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:56,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:56,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-03 14:10:56,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376076192] [2021-05-03 14:10:56,127 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:10:56,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:56,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:10:56,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:10:56,128 INFO L87 Difference]: Start difference. First operand 283 states and 829 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:56,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:56,386 INFO L93 Difference]: Finished difference Result 301 states and 868 transitions. [2021-05-03 14:10:56,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:10:56,387 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:10:56,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:56,387 INFO L225 Difference]: With dead ends: 301 [2021-05-03 14:10:56,387 INFO L226 Difference]: Without dead ends: 296 [2021-05-03 14:10:56,387 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 260.1ms TimeCoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:10:56,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-05-03 14:10:56,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 284. [2021-05-03 14:10:56,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 2.943462897526502) internal successors, (833), 283 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:56,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 833 transitions. [2021-05-03 14:10:56,390 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 833 transitions. Word has length 18 [2021-05-03 14:10:56,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:56,390 INFO L480 AbstractCegarLoop]: Abstraction has 284 states and 833 transitions. [2021-05-03 14:10:56,391 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:56,391 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 833 transitions. [2021-05-03 14:10:56,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:10:56,391 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:56,391 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:56,604 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9457 [2021-05-03 14:10:56,605 INFO L428 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:56,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:56,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1423882327, now seen corresponding path program 111 times [2021-05-03 14:10:56,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:56,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094763504] [2021-05-03 14:10:56,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:56,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:56,640 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 14:10:56,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094763504] [2021-05-03 14:10:56,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823655255] [2021-05-03 14:10:56,640 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:56,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:10:56,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:56,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:10:56,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:56,697 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:10:56,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:56,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-05-03 14:10:56,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960874758] [2021-05-03 14:10:56,697 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 14:10:56,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:56,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 14:10:56,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:10:56,698 INFO L87 Difference]: Start difference. First operand 284 states and 833 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:56,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:56,738 INFO L93 Difference]: Finished difference Result 435 states and 1110 transitions. [2021-05-03 14:10:56,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:10:56,738 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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 18 [2021-05-03 14:10:56,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:56,739 INFO L225 Difference]: With dead ends: 435 [2021-05-03 14:10:56,739 INFO L226 Difference]: Without dead ends: 435 [2021-05-03 14:10:56,739 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 30.0ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:10:56,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-05-03 14:10:56,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 311. [2021-05-03 14:10:56,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 2.967741935483871) internal successors, (920), 310 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:56,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 920 transitions. [2021-05-03 14:10:56,743 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 920 transitions. Word has length 18 [2021-05-03 14:10:56,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:56,743 INFO L480 AbstractCegarLoop]: Abstraction has 311 states and 920 transitions. [2021-05-03 14:10:56,743 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:56,743 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 920 transitions. [2021-05-03 14:10:56,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:10:56,744 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:56,744 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:56,944 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9617,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:56,944 INFO L428 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:56,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:56,945 INFO L82 PathProgramCache]: Analyzing trace with hash 810225167, now seen corresponding path program 112 times [2021-05-03 14:10:56,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:56,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219002662] [2021-05-03 14:10:56,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:56,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:56,990 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:56,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219002662] [2021-05-03 14:10:56,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097532456] [2021-05-03 14:10:56,990 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:57,009 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:10:57,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:57,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:10:57,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:57,045 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:10:57,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:57,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-05-03 14:10:57,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751129267] [2021-05-03 14:10:57,046 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:10:57,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:57,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:10:57,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:10:57,046 INFO L87 Difference]: Start difference. First operand 311 states and 920 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:57,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:57,113 INFO L93 Difference]: Finished difference Result 471 states and 1163 transitions. [2021-05-03 14:10:57,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 14:10:57,113 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 18 [2021-05-03 14:10:57,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:57,114 INFO L225 Difference]: With dead ends: 471 [2021-05-03 14:10:57,114 INFO L226 Difference]: Without dead ends: 471 [2021-05-03 14:10:57,115 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 49.5ms TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:10:57,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-05-03 14:10:57,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 309. [2021-05-03 14:10:57,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.9642857142857144) internal successors, (913), 308 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:57,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 913 transitions. [2021-05-03 14:10:57,120 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 913 transitions. Word has length 18 [2021-05-03 14:10:57,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:57,120 INFO L480 AbstractCegarLoop]: Abstraction has 309 states and 913 transitions. [2021-05-03 14:10:57,120 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:57,120 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 913 transitions. [2021-05-03 14:10:57,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:10:57,121 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:57,121 INFO L551 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:57,321 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9618 [2021-05-03 14:10:57,321 INFO L428 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:57,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:57,322 INFO L82 PathProgramCache]: Analyzing trace with hash 628461418, now seen corresponding path program 113 times [2021-05-03 14:10:57,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:57,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659976747] [2021-05-03 14:10:57,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:57,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:57,427 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:57,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659976747] [2021-05-03 14:10:57,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367107090] [2021-05-03 14:10:57,432 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:57,459 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 14:10:57,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:57,460 WARN L261 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-03 14:10:57,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:57,762 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:10:57,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-05-03 14:10:58,012 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:10:58,014 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:10:58,014 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:10:58,014 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-05-03 14:10:58,021 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:58,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:58,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-03 14:10:58,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828850243] [2021-05-03 14:10:58,021 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:10:58,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:58,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:10:58,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:10:58,022 INFO L87 Difference]: Start difference. First operand 309 states and 913 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:58,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:58,315 INFO L93 Difference]: Finished difference Result 383 states and 1039 transitions. [2021-05-03 14:10:58,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:10:58,315 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:10:58,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:58,316 INFO L225 Difference]: With dead ends: 383 [2021-05-03 14:10:58,316 INFO L226 Difference]: Without dead ends: 366 [2021-05-03 14:10:58,316 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 344.8ms TimeCoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:10:58,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-05-03 14:10:58,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 309. [2021-05-03 14:10:58,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.9545454545454546) internal successors, (910), 308 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:58,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 910 transitions. [2021-05-03 14:10:58,319 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 910 transitions. Word has length 18 [2021-05-03 14:10:58,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:58,319 INFO L480 AbstractCegarLoop]: Abstraction has 309 states and 910 transitions. [2021-05-03 14:10:58,319 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:58,319 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 910 transitions. [2021-05-03 14:10:58,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:10:58,320 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:58,320 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:58,520 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9619,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:58,520 INFO L428 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:58,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:58,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1348080745, now seen corresponding path program 114 times [2021-05-03 14:10:58,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:58,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409216605] [2021-05-03 14:10:58,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:58,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:58,649 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:58,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409216605] [2021-05-03 14:10:58,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299836459] [2021-05-03 14:10:58,649 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 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:58,669 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:10:58,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:58,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:10:58,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:58,700 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:58,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:58,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-05-03 14:10:58,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623427730] [2021-05-03 14:10:58,700 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:10:58,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:58,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:10:58,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:10:58,700 INFO L87 Difference]: Start difference. First operand 309 states and 910 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:58,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:58,787 INFO L93 Difference]: Finished difference Result 503 states and 1214 transitions. [2021-05-03 14:10:58,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:10:58,788 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 18 [2021-05-03 14:10:58,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:58,789 INFO L225 Difference]: With dead ends: 503 [2021-05-03 14:10:58,789 INFO L226 Difference]: Without dead ends: 503 [2021-05-03 14:10:58,789 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 145.6ms TimeCoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:10:58,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2021-05-03 14:10:58,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 309. [2021-05-03 14:10:58,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.9545454545454546) internal successors, (910), 308 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:58,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 910 transitions. [2021-05-03 14:10:58,792 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 910 transitions. Word has length 18 [2021-05-03 14:10:58,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:58,792 INFO L480 AbstractCegarLoop]: Abstraction has 309 states and 910 transitions. [2021-05-03 14:10:58,792 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:58,792 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 910 transitions. [2021-05-03 14:10:58,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:10:58,793 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:58,793 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:59,007 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9757,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:59,008 INFO L428 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:59,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:59,008 INFO L82 PathProgramCache]: Analyzing trace with hash 841734479, now seen corresponding path program 115 times [2021-05-03 14:10:59,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:59,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193387757] [2021-05-03 14:10:59,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:59,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:59,043 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:59,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193387757] [2021-05-03 14:10:59,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925912476] [2021-05-03 14:10:59,044 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:59,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:59,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:10:59,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:59,101 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:59,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:59,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-05-03 14:10:59,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944338776] [2021-05-03 14:10:59,102 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:10:59,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:59,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:10:59,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:10:59,102 INFO L87 Difference]: Start difference. First operand 309 states and 910 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:59,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:59,248 INFO L93 Difference]: Finished difference Result 546 states and 1298 transitions. [2021-05-03 14:10:59,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:10:59,248 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) 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 18 [2021-05-03 14:10:59,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:59,249 INFO L225 Difference]: With dead ends: 546 [2021-05-03 14:10:59,249 INFO L226 Difference]: Without dead ends: 546 [2021-05-03 14:10:59,249 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 102.2ms TimeCoverageRelationStatistics Valid=160, Invalid=302, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:10:59,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-05-03 14:10:59,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 309. [2021-05-03 14:10:59,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.9545454545454546) internal successors, (910), 308 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:59,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 910 transitions. [2021-05-03 14:10:59,253 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 910 transitions. Word has length 18 [2021-05-03 14:10:59,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:59,253 INFO L480 AbstractCegarLoop]: Abstraction has 309 states and 910 transitions. [2021-05-03 14:10:59,253 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:59,253 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 910 transitions. [2021-05-03 14:10:59,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:10:59,253 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:59,253 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:59,453 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9758,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:59,454 INFO L428 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:59,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:59,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1970097879, now seen corresponding path program 116 times [2021-05-03 14:10:59,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:59,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826859256] [2021-05-03 14:10:59,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:59,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:59,497 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:59,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826859256] [2021-05-03 14:10:59,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531570836] [2021-05-03 14:10:59,497 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:59,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:10:59,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:59,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:10:59,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:59,571 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:59,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:59,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-05-03 14:10:59,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689389302] [2021-05-03 14:10:59,572 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:10:59,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:59,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:10:59,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:10:59,572 INFO L87 Difference]: Start difference. First operand 309 states and 910 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:59,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:59,757 INFO L93 Difference]: Finished difference Result 544 states and 1360 transitions. [2021-05-03 14:10:59,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:10:59,761 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) 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 18 [2021-05-03 14:10:59,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:59,762 INFO L225 Difference]: With dead ends: 544 [2021-05-03 14:10:59,762 INFO L226 Difference]: Without dead ends: 544 [2021-05-03 14:10:59,762 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 139.7ms TimeCoverageRelationStatistics Valid=218, Invalid=432, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:10:59,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-05-03 14:10:59,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 311. [2021-05-03 14:10:59,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 2.9548387096774196) internal successors, (916), 310 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:59,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 916 transitions. [2021-05-03 14:10:59,766 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 916 transitions. Word has length 18 [2021-05-03 14:10:59,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:59,766 INFO L480 AbstractCegarLoop]: Abstraction has 311 states and 916 transitions. [2021-05-03 14:10:59,766 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:59,766 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 916 transitions. [2021-05-03 14:10:59,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:10:59,766 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:59,766 INFO L551 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:59,972 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9759,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:59,973 INFO L428 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:59,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:59,973 INFO L82 PathProgramCache]: Analyzing trace with hash 226168694, now seen corresponding path program 117 times [2021-05-03 14:10:59,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:59,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963302296] [2021-05-03 14:10:59,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:59,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:00,087 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:00,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963302296] [2021-05-03 14:11:00,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227659727] [2021-05-03 14:11:00,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:00,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 14:11:00,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:00,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-03 14:11:00,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:00,392 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:11:00,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-05-03 14:11:00,577 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:11:00,578 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:11:00,579 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:11:00,579 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-05-03 14:11:00,584 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:00,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:00,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-03 14:11:00,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019800361] [2021-05-03 14:11:00,584 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:11:00,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:00,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:11:00,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:11:00,585 INFO L87 Difference]: Start difference. First operand 311 states and 916 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:00,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:00,963 INFO L93 Difference]: Finished difference Result 365 states and 1058 transitions. [2021-05-03 14:11:00,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:11:00,964 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:11:00,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:00,964 INFO L225 Difference]: With dead ends: 365 [2021-05-03 14:11:00,964 INFO L226 Difference]: Without dead ends: 360 [2021-05-03 14:11:00,965 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 270.5ms TimeCoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:11:00,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-05-03 14:11:00,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 329. [2021-05-03 14:11:00,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.9969512195121952) internal successors, (983), 328 states have internal predecessors, (983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:00,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 983 transitions. [2021-05-03 14:11:00,968 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 983 transitions. Word has length 18 [2021-05-03 14:11:00,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:00,968 INFO L480 AbstractCegarLoop]: Abstraction has 329 states and 983 transitions. [2021-05-03 14:11:00,968 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:00,968 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 983 transitions. [2021-05-03 14:11:00,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:11:00,968 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:00,968 INFO L551 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:01,181 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9760,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:01,181 INFO L428 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:01,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:01,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1499310764, now seen corresponding path program 118 times [2021-05-03 14:11:01,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:01,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069467703] [2021-05-03 14:11:01,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:01,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:01,303 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:01,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069467703] [2021-05-03 14:11:01,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987686431] [2021-05-03 14:11:01,304 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 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:01,325 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:11:01,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:01,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-03 14:11:01,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:01,676 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:11:01,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-05-03 14:11:02,097 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:11:02,098 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:11:02,098 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:11:02,098 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-05-03 14:11:02,105 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:02,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:02,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-03 14:11:02,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164108162] [2021-05-03 14:11:02,105 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:11:02,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:02,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:11:02,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:11:02,105 INFO L87 Difference]: Start difference. First operand 329 states and 983 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:02,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:02,504 INFO L93 Difference]: Finished difference Result 375 states and 1069 transitions. [2021-05-03 14:11:02,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 14:11:02,504 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:11:02,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:02,505 INFO L225 Difference]: With dead ends: 375 [2021-05-03 14:11:02,505 INFO L226 Difference]: Without dead ends: 370 [2021-05-03 14:11:02,505 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 412.0ms TimeCoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:11:02,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-05-03 14:11:02,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 329. [2021-05-03 14:11:02,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.9969512195121952) internal successors, (983), 328 states have internal predecessors, (983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:02,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 983 transitions. [2021-05-03 14:11:02,509 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 983 transitions. Word has length 18 [2021-05-03 14:11:02,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:02,509 INFO L480 AbstractCegarLoop]: Abstraction has 329 states and 983 transitions. [2021-05-03 14:11:02,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:02,510 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 983 transitions. [2021-05-03 14:11:02,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:11:02,510 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:02,510 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:02,725 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9867,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:02,726 INFO L428 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:02,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:02,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1159632403, now seen corresponding path program 119 times [2021-05-03 14:11:02,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:02,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120948518] [2021-05-03 14:11:02,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:02,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:02,773 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:02,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120948518] [2021-05-03 14:11:02,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260765936] [2021-05-03 14:11:02,774 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 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:02,798 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 14:11:02,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:02,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:11:02,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:02,859 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:11:02,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:02,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-05-03 14:11:02,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065500597] [2021-05-03 14:11:02,860 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:11:02,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:02,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:11:02,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:11:02,860 INFO L87 Difference]: Start difference. First operand 329 states and 983 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:02,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:02,927 INFO L93 Difference]: Finished difference Result 498 states and 1262 transitions. [2021-05-03 14:11:02,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 14:11:02,927 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 18 [2021-05-03 14:11:02,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:02,928 INFO L225 Difference]: With dead ends: 498 [2021-05-03 14:11:02,928 INFO L226 Difference]: Without dead ends: 498 [2021-05-03 14:11:02,928 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 53.3ms TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:11:02,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-05-03 14:11:02,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 300. [2021-05-03 14:11:02,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.9732441471571907) internal successors, (889), 299 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:02,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 889 transitions. [2021-05-03 14:11:02,932 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 889 transitions. Word has length 18 [2021-05-03 14:11:02,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:02,932 INFO L480 AbstractCegarLoop]: Abstraction has 300 states and 889 transitions. [2021-05-03 14:11:02,932 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:02,932 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 889 transitions. [2021-05-03 14:11:02,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:11:02,933 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:02,933 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:03,148 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10067 [2021-05-03 14:11:03,149 INFO L428 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:03,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:03,149 INFO L82 PathProgramCache]: Analyzing trace with hash -901227399, now seen corresponding path program 120 times [2021-05-03 14:11:03,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:03,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789265285] [2021-05-03 14:11:03,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:03,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:03,195 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:11:03,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789265285] [2021-05-03 14:11:03,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442472386] [2021-05-03 14:11:03,195 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 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:03,250 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:11:03,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:03,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:11:03,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:03,303 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 14:11:03,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:03,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-05-03 14:11:03,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382849755] [2021-05-03 14:11:03,303 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:11:03,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:03,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:11:03,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:11:03,308 INFO L87 Difference]: Start difference. First operand 300 states and 889 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:03,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:03,359 INFO L93 Difference]: Finished difference Result 440 states and 1150 transitions. [2021-05-03 14:11:03,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:11:03,365 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 18 [2021-05-03 14:11:03,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:03,366 INFO L225 Difference]: With dead ends: 440 [2021-05-03 14:11:03,366 INFO L226 Difference]: Without dead ends: 440 [2021-05-03 14:11:03,366 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 53.4ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:11:03,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2021-05-03 14:11:03,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 328. [2021-05-03 14:11:03,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.9877675840978593) internal successors, (977), 327 states have internal predecessors, (977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:03,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 977 transitions. [2021-05-03 14:11:03,370 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 977 transitions. Word has length 18 [2021-05-03 14:11:03,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:03,370 INFO L480 AbstractCegarLoop]: Abstraction has 328 states and 977 transitions. [2021-05-03 14:11:03,370 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:03,370 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 977 transitions. [2021-05-03 14:11:03,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:11:03,370 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:03,370 INFO L551 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:03,581 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10068 [2021-05-03 14:11:03,581 INFO L428 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:03,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:03,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1082991148, now seen corresponding path program 121 times [2021-05-03 14:11:03,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:03,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709164683] [2021-05-03 14:11:03,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:03,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:03,670 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:03,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709164683] [2021-05-03 14:11:03,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605375043] [2021-05-03 14:11:03,670 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 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:03,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:03,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-03 14:11:03,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:04,111 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:11:04,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-05-03 14:11:04,467 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:11:04,468 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:11:04,469 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:11:04,469 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-05-03 14:11:04,475 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:04,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:04,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-03 14:11:04,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401208858] [2021-05-03 14:11:04,476 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:11:04,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:04,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:11:04,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:11:04,476 INFO L87 Difference]: Start difference. First operand 328 states and 977 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:04,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:04,826 INFO L93 Difference]: Finished difference Result 386 states and 1061 transitions. [2021-05-03 14:11:04,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:11:04,827 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:11:04,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:04,827 INFO L225 Difference]: With dead ends: 386 [2021-05-03 14:11:04,827 INFO L226 Difference]: Without dead ends: 373 [2021-05-03 14:11:04,828 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 438.9ms TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:11:04,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-05-03 14:11:04,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 328. [2021-05-03 14:11:04,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.984709480122324) internal successors, (976), 327 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:04,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 976 transitions. [2021-05-03 14:11:04,831 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 976 transitions. Word has length 18 [2021-05-03 14:11:04,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:04,831 INFO L480 AbstractCegarLoop]: Abstraction has 328 states and 976 transitions. [2021-05-03 14:11:04,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:04,831 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 976 transitions. [2021-05-03 14:11:04,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:11:04,832 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:04,832 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:05,037 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10069 [2021-05-03 14:11:05,037 INFO L428 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:05,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:05,038 INFO L82 PathProgramCache]: Analyzing trace with hash -363371821, now seen corresponding path program 122 times [2021-05-03 14:11:05,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:05,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499793431] [2021-05-03 14:11:05,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:05,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:05,094 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:05,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499793431] [2021-05-03 14:11:05,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454017066] [2021-05-03 14:11:05,095 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 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:05,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:11:05,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:05,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:11:05,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:05,145 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:05,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:05,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-05-03 14:11:05,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290460383] [2021-05-03 14:11:05,145 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:11:05,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:05,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:11:05,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:11:05,146 INFO L87 Difference]: Start difference. First operand 328 states and 976 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:05,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:05,256 INFO L93 Difference]: Finished difference Result 472 states and 1196 transitions. [2021-05-03 14:11:05,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:11:05,256 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 18 [2021-05-03 14:11:05,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:05,257 INFO L225 Difference]: With dead ends: 472 [2021-05-03 14:11:05,257 INFO L226 Difference]: Without dead ends: 472 [2021-05-03 14:11:05,257 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 65.5ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:11:05,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-05-03 14:11:05,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 312. [2021-05-03 14:11:05,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.9710610932475885) internal successors, (924), 311 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:05,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 924 transitions. [2021-05-03 14:11:05,261 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 924 transitions. Word has length 18 [2021-05-03 14:11:05,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:05,261 INFO L480 AbstractCegarLoop]: Abstraction has 312 states and 924 transitions. [2021-05-03 14:11:05,261 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:05,261 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 924 transitions. [2021-05-03 14:11:05,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:11:05,261 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:05,262 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:05,469 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10232 [2021-05-03 14:11:05,469 INFO L428 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:05,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:05,469 INFO L82 PathProgramCache]: Analyzing trace with hash -869718087, now seen corresponding path program 123 times [2021-05-03 14:11:05,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:05,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703602042] [2021-05-03 14:11:05,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:05,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:05,519 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:05,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703602042] [2021-05-03 14:11:05,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228822947] [2021-05-03 14:11:05,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:05,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:11:05,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:05,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:11:05,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:05,580 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:05,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:05,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-05-03 14:11:05,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095275013] [2021-05-03 14:11:05,581 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:11:05,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:05,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:11:05,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:11:05,581 INFO L87 Difference]: Start difference. First operand 312 states and 924 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:05,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:05,723 INFO L93 Difference]: Finished difference Result 490 states and 1202 transitions. [2021-05-03 14:11:05,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:11:05,724 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) 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 18 [2021-05-03 14:11:05,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:05,724 INFO L225 Difference]: With dead ends: 490 [2021-05-03 14:11:05,724 INFO L226 Difference]: Without dead ends: 490 [2021-05-03 14:11:05,725 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 107.0ms TimeCoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:11:05,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-05-03 14:11:05,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 300. [2021-05-03 14:11:05,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.9665551839464883) internal successors, (887), 299 states have internal predecessors, (887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:05,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 887 transitions. [2021-05-03 14:11:05,728 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 887 transitions. Word has length 18 [2021-05-03 14:11:05,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:05,728 INFO L480 AbstractCegarLoop]: Abstraction has 300 states and 887 transitions. [2021-05-03 14:11:05,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:05,728 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 887 transitions. [2021-05-03 14:11:05,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:11:05,729 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:05,729 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:05,942 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10233 [2021-05-03 14:11:05,942 INFO L428 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:05,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:05,943 INFO L82 PathProgramCache]: Analyzing trace with hash 613416851, now seen corresponding path program 124 times [2021-05-03 14:11:05,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:05,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144323715] [2021-05-03 14:11:05,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:05,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:05,998 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:05,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144323715] [2021-05-03 14:11:05,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214482631] [2021-05-03 14:11:05,999 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 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:06,017 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:11:06,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:06,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:11:06,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:06,074 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:06,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:06,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-05-03 14:11:06,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760824032] [2021-05-03 14:11:06,074 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:11:06,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:06,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:11:06,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:11:06,075 INFO L87 Difference]: Start difference. First operand 300 states and 887 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:06,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:06,257 INFO L93 Difference]: Finished difference Result 433 states and 1094 transitions. [2021-05-03 14:11:06,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:11:06,258 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) 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 18 [2021-05-03 14:11:06,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:06,273 INFO L225 Difference]: With dead ends: 433 [2021-05-03 14:11:06,273 INFO L226 Difference]: Without dead ends: 433 [2021-05-03 14:11:06,273 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 161.1ms TimeCoverageRelationStatistics Valid=203, Invalid=397, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:11:06,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-05-03 14:11:06,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 294. [2021-05-03 14:11:06,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.9658703071672354) internal successors, (869), 293 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:06,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 869 transitions. [2021-05-03 14:11:06,277 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 869 transitions. Word has length 18 [2021-05-03 14:11:06,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:06,278 INFO L480 AbstractCegarLoop]: Abstraction has 294 states and 869 transitions. [2021-05-03 14:11:06,278 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:06,278 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 869 transitions. [2021-05-03 14:11:06,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:11:06,278 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:06,278 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:06,493 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10234 [2021-05-03 14:11:06,493 INFO L428 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:06,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:06,493 INFO L82 PathProgramCache]: Analyzing trace with hash -654040327, now seen corresponding path program 125 times [2021-05-03 14:11:06,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:06,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835528222] [2021-05-03 14:11:06,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:06,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:06,543 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:06,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835528222] [2021-05-03 14:11:06,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659984572] [2021-05-03 14:11:06,544 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 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:06,563 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:11:06,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:06,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:11:06,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:06,602 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:06,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:06,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-05-03 14:11:06,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261944545] [2021-05-03 14:11:06,603 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:11:06,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:06,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:11:06,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:11:06,605 INFO L87 Difference]: Start difference. First operand 294 states and 869 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:06,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:06,810 INFO L93 Difference]: Finished difference Result 474 states and 1217 transitions. [2021-05-03 14:11:06,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:11:06,810 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) 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 18 [2021-05-03 14:11:06,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:06,811 INFO L225 Difference]: With dead ends: 474 [2021-05-03 14:11:06,811 INFO L226 Difference]: Without dead ends: 474 [2021-05-03 14:11:06,811 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 158.3ms TimeCoverageRelationStatistics Valid=219, Invalid=431, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:11:06,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-05-03 14:11:06,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 298. [2021-05-03 14:11:06,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.9663299663299663) internal successors, (881), 297 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:06,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 881 transitions. [2021-05-03 14:11:06,815 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 881 transitions. Word has length 18 [2021-05-03 14:11:06,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:06,815 INFO L480 AbstractCegarLoop]: Abstraction has 298 states and 881 transitions. [2021-05-03 14:11:06,815 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:06,815 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 881 transitions. [2021-05-03 14:11:06,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:11:06,816 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:06,816 INFO L551 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:07,016 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10235 [2021-05-03 14:11:07,016 INFO L428 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:07,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:07,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1289253300, now seen corresponding path program 126 times [2021-05-03 14:11:07,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:07,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643532746] [2021-05-03 14:11:07,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:07,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:07,142 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:07,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643532746] [2021-05-03 14:11:07,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095372301] [2021-05-03 14:11:07,143 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:07,166 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 14:11:07,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:07,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-03 14:11:07,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:07,480 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:11:07,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-05-03 14:11:07,938 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:11:07,940 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:11:07,940 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:11:07,940 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-05-03 14:11:07,946 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:07,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:07,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-03 14:11:07,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155530543] [2021-05-03 14:11:07,946 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:11:07,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:07,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:11:07,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:11:07,947 INFO L87 Difference]: Start difference. First operand 298 states and 881 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:08,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:08,672 INFO L93 Difference]: Finished difference Result 381 states and 1116 transitions. [2021-05-03 14:11:08,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:11:08,672 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:11:08,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:08,673 INFO L225 Difference]: With dead ends: 381 [2021-05-03 14:11:08,673 INFO L226 Difference]: Without dead ends: 376 [2021-05-03 14:11:08,673 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 288.8ms TimeCoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:11:08,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-05-03 14:11:08,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 341. [2021-05-03 14:11:08,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 3.0352941176470587) internal successors, (1032), 340 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:08,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1032 transitions. [2021-05-03 14:11:08,677 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1032 transitions. Word has length 18 [2021-05-03 14:11:08,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:08,677 INFO L480 AbstractCegarLoop]: Abstraction has 341 states and 1032 transitions. [2021-05-03 14:11:08,677 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:08,677 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1032 transitions. [2021-05-03 14:11:08,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:11:08,677 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:08,677 INFO L551 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:08,892 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10236 [2021-05-03 14:11:08,892 INFO L428 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:08,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:08,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1280234538, now seen corresponding path program 127 times [2021-05-03 14:11:08,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:08,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717719516] [2021-05-03 14:11:08,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:08,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:09,049 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:09,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717719516] [2021-05-03 14:11:09,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633054194] [2021-05-03 14:11:09,049 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 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:09,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:09,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-03 14:11:09,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:09,387 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:11:09,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-05-03 14:11:09,813 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:11:09,814 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:11:09,815 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:11:09,815 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-05-03 14:11:09,821 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:09,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:09,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-03 14:11:09,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115013189] [2021-05-03 14:11:09,821 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:11:09,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:09,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:11:09,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:11:09,822 INFO L87 Difference]: Start difference. First operand 341 states and 1032 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:10,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:10,336 INFO L93 Difference]: Finished difference Result 396 states and 1134 transitions. [2021-05-03 14:11:10,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 14:11:10,336 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:11:10,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:10,337 INFO L225 Difference]: With dead ends: 396 [2021-05-03 14:11:10,337 INFO L226 Difference]: Without dead ends: 391 [2021-05-03 14:11:10,337 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 409.2ms TimeCoverageRelationStatistics Valid=91, Invalid=721, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:11:10,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-05-03 14:11:10,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 341. [2021-05-03 14:11:10,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 3.0352941176470587) internal successors, (1032), 340 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:10,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1032 transitions. [2021-05-03 14:11:10,341 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1032 transitions. Word has length 18 [2021-05-03 14:11:10,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:10,341 INFO L480 AbstractCegarLoop]: Abstraction has 341 states and 1032 transitions. [2021-05-03 14:11:10,341 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:10,341 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1032 transitions. [2021-05-03 14:11:10,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:11:10,341 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:10,341 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:10,548 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10422,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:10,549 INFO L428 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:10,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:10,549 INFO L82 PathProgramCache]: Analyzing trace with hash -355789591, now seen corresponding path program 128 times [2021-05-03 14:11:10,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:10,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141458622] [2021-05-03 14:11:10,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:10,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:10,603 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:10,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141458622] [2021-05-03 14:11:10,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065362712] [2021-05-03 14:11:10,603 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 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:11:10,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:11:10,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:10,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:11:10,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:10,657 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:10,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:10,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-05-03 14:11:10,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593110731] [2021-05-03 14:11:10,657 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:11:10,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:10,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:11:10,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:11:10,657 INFO L87 Difference]: Start difference. First operand 341 states and 1032 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:10,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:10,726 INFO L93 Difference]: Finished difference Result 539 states and 1358 transitions. [2021-05-03 14:11:10,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:11:10,726 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:11:10,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:10,727 INFO L225 Difference]: With dead ends: 539 [2021-05-03 14:11:10,727 INFO L226 Difference]: Without dead ends: 539 [2021-05-03 14:11:10,727 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 63.1ms TimeCoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:11:10,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-05-03 14:11:10,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 352. [2021-05-03 14:11:10,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 3.0484330484330484) internal successors, (1070), 351 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:10,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 1070 transitions. [2021-05-03 14:11:10,731 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 1070 transitions. Word has length 18 [2021-05-03 14:11:10,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:10,731 INFO L480 AbstractCegarLoop]: Abstraction has 352 states and 1070 transitions. [2021-05-03 14:11:10,731 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:10,731 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 1070 transitions. [2021-05-03 14:11:10,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:11:10,731 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:10,731 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:10,946 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10666 [2021-05-03 14:11:10,946 INFO L428 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:10,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:10,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1878317903, now seen corresponding path program 129 times [2021-05-03 14:11:10,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:10,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057503042] [2021-05-03 14:11:10,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:10,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:10,999 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:10,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057503042] [2021-05-03 14:11:10,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069568265] [2021-05-03 14:11:10,999 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 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:11:11,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 14:11:11,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:11,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:11:11,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:11,058 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:11,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:11,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-05-03 14:11:11,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035005522] [2021-05-03 14:11:11,058 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:11:11,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:11,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:11:11,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:11:11,059 INFO L87 Difference]: Start difference. First operand 352 states and 1070 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:11,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:11,129 INFO L93 Difference]: Finished difference Result 516 states and 1352 transitions. [2021-05-03 14:11:11,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:11:11,140 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:11:11,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:11,151 INFO L225 Difference]: With dead ends: 516 [2021-05-03 14:11:11,152 INFO L226 Difference]: Without dead ends: 516 [2021-05-03 14:11:11,152 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 72.0ms TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:11:11,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-05-03 14:11:11,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 368. [2021-05-03 14:11:11,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 3.0626702997275204) internal successors, (1124), 367 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:11,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 1124 transitions. [2021-05-03 14:11:11,156 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 1124 transitions. Word has length 18 [2021-05-03 14:11:11,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:11,156 INFO L480 AbstractCegarLoop]: Abstraction has 368 states and 1124 transitions. [2021-05-03 14:11:11,156 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:11,156 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 1124 transitions. [2021-05-03 14:11:11,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:11:11,157 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:11,157 INFO L551 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:11,368 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10667 [2021-05-03 14:11:11,369 INFO L428 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:11,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:11,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1696554154, now seen corresponding path program 130 times [2021-05-03 14:11:11,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:11,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62288477] [2021-05-03 14:11:11,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:11,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:11,475 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:11,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62288477] [2021-05-03 14:11:11,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231133341] [2021-05-03 14:11:11,476 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 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:11:11,501 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:11:11,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:11,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-03 14:11:11,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:11,837 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:11:11,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-05-03 14:11:12,021 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:11:12,022 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:11:12,023 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:11:12,023 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-05-03 14:11:12,029 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:12,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:12,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-03 14:11:12,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004937585] [2021-05-03 14:11:12,030 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:11:12,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:12,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:11:12,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:11:12,030 INFO L87 Difference]: Start difference. First operand 368 states and 1124 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:12,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:12,310 INFO L93 Difference]: Finished difference Result 420 states and 1201 transitions. [2021-05-03 14:11:12,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 14:11:12,311 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:11:12,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:12,311 INFO L225 Difference]: With dead ends: 420 [2021-05-03 14:11:12,311 INFO L226 Difference]: Without dead ends: 415 [2021-05-03 14:11:12,311 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 401.0ms TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:11:12,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-05-03 14:11:12,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 368. [2021-05-03 14:11:12,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 3.0626702997275204) internal successors, (1124), 367 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:12,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 1124 transitions. [2021-05-03 14:11:12,315 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 1124 transitions. Word has length 18 [2021-05-03 14:11:12,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:12,315 INFO L480 AbstractCegarLoop]: Abstraction has 368 states and 1124 transitions. [2021-05-03 14:11:12,315 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:12,315 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 1124 transitions. [2021-05-03 14:11:12,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:11:12,316 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:12,316 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:12,524 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10668,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:12,525 INFO L428 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:12,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:12,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1878793815, now seen corresponding path program 131 times [2021-05-03 14:11:12,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:12,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374528259] [2021-05-03 14:11:12,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:12,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:12,574 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:12,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374528259] [2021-05-03 14:11:12,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443575613] [2021-05-03 14:11:12,574 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 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:11:12,593 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 14:11:12,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:12,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:11:12,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:12,626 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:11:12,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:12,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-05-03 14:11:12,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144486893] [2021-05-03 14:11:12,626 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:11:12,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:12,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:11:12,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:11:12,627 INFO L87 Difference]: Start difference. First operand 368 states and 1124 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:12,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:12,692 INFO L93 Difference]: Finished difference Result 489 states and 1363 transitions. [2021-05-03 14:11:12,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:11:12,692 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:11:12,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:12,693 INFO L225 Difference]: With dead ends: 489 [2021-05-03 14:11:12,693 INFO L226 Difference]: Without dead ends: 489 [2021-05-03 14:11:12,693 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 62.5ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:11:12,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-05-03 14:11:12,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 401. [2021-05-03 14:11:12,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 3.0625) internal successors, (1225), 400 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:12,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 1225 transitions. [2021-05-03 14:11:12,697 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 1225 transitions. Word has length 18 [2021-05-03 14:11:12,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:12,698 INFO L480 AbstractCegarLoop]: Abstraction has 401 states and 1225 transitions. [2021-05-03 14:11:12,698 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:12,698 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 1225 transitions. [2021-05-03 14:11:12,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:11:12,698 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:12,698 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:12,913 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10778 [2021-05-03 14:11:12,913 INFO L428 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:12,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:12,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1909827215, now seen corresponding path program 132 times [2021-05-03 14:11:12,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:12,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672832479] [2021-05-03 14:11:12,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:12,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:12,957 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:12,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672832479] [2021-05-03 14:11:12,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221328850] [2021-05-03 14:11:12,958 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 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:11:12,982 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:11:12,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:12,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:11:12,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:13,042 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:13,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:13,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-05-03 14:11:13,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032575237] [2021-05-03 14:11:13,043 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:11:13,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:13,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:11:13,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:11:13,043 INFO L87 Difference]: Start difference. First operand 401 states and 1225 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:13,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:13,165 INFO L93 Difference]: Finished difference Result 521 states and 1410 transitions. [2021-05-03 14:11:13,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:11:13,165 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 18 [2021-05-03 14:11:13,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:13,166 INFO L225 Difference]: With dead ends: 521 [2021-05-03 14:11:13,166 INFO L226 Difference]: Without dead ends: 521 [2021-05-03 14:11:13,166 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 117.1ms TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:11:13,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-05-03 14:11:13,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 397. [2021-05-03 14:11:13,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 3.0606060606060606) internal successors, (1212), 396 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:13,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 1212 transitions. [2021-05-03 14:11:13,170 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 1212 transitions. Word has length 18 [2021-05-03 14:11:13,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:13,171 INFO L480 AbstractCegarLoop]: Abstraction has 397 states and 1212 transitions. [2021-05-03 14:11:13,171 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:13,171 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 1212 transitions. [2021-05-03 14:11:13,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:11:13,171 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:13,171 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:13,385 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10779,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:13,385 INFO L428 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:13,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:13,385 INFO L82 PathProgramCache]: Analyzing trace with hash -902005143, now seen corresponding path program 133 times [2021-05-03 14:11:13,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:13,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671528558] [2021-05-03 14:11:13,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:13,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:13,431 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:13,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671528558] [2021-05-03 14:11:13,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194358518] [2021-05-03 14:11:13,431 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 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:11:13,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:13,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:11:13,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:13,489 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:13,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:13,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-05-03 14:11:13,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873698857] [2021-05-03 14:11:13,489 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:11:13,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:13,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:11:13,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:11:13,490 INFO L87 Difference]: Start difference. First operand 397 states and 1212 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:13,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:13,655 INFO L93 Difference]: Finished difference Result 501 states and 1377 transitions. [2021-05-03 14:11:13,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:11:13,655 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 18 [2021-05-03 14:11:13,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:13,656 INFO L225 Difference]: With dead ends: 501 [2021-05-03 14:11:13,656 INFO L226 Difference]: Without dead ends: 501 [2021-05-03 14:11:13,656 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 144.9ms TimeCoverageRelationStatistics Valid=171, Invalid=335, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:11:13,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-05-03 14:11:13,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 394. [2021-05-03 14:11:13,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 3.0610687022900764) internal successors, (1203), 393 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:13,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 1203 transitions. [2021-05-03 14:11:13,660 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 1203 transitions. Word has length 18 [2021-05-03 14:11:13,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:13,660 INFO L480 AbstractCegarLoop]: Abstraction has 394 states and 1203 transitions. [2021-05-03 14:11:13,661 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:13,661 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 1203 transitions. [2021-05-03 14:11:13,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:11:13,661 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:13,661 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:13,876 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10780,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:13,876 INFO L428 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:13,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:13,876 INFO L82 PathProgramCache]: Analyzing trace with hash 2125504975, now seen corresponding path program 134 times [2021-05-03 14:11:13,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:13,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288492018] [2021-05-03 14:11:13,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:13,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:13,927 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:13,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288492018] [2021-05-03 14:11:13,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941226958] [2021-05-03 14:11:13,928 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 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:13,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:11:13,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:13,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:11:13,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:14,000 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:14,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:14,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-05-03 14:11:14,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277946514] [2021-05-03 14:11:14,000 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:11:14,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:14,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:11:14,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:11:14,001 INFO L87 Difference]: Start difference. First operand 394 states and 1203 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:14,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:14,165 INFO L93 Difference]: Finished difference Result 512 states and 1422 transitions. [2021-05-03 14:11:14,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:11:14,165 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 18 [2021-05-03 14:11:14,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:14,166 INFO L225 Difference]: With dead ends: 512 [2021-05-03 14:11:14,166 INFO L226 Difference]: Without dead ends: 512 [2021-05-03 14:11:14,166 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 147.8ms TimeCoverageRelationStatistics Valid=189, Invalid=363, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:11:14,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-05-03 14:11:14,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 394. [2021-05-03 14:11:14,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 3.0610687022900764) internal successors, (1203), 393 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:14,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 1203 transitions. [2021-05-03 14:11:14,199 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 1203 transitions. Word has length 18 [2021-05-03 14:11:14,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:14,200 INFO L480 AbstractCegarLoop]: Abstraction has 394 states and 1203 transitions. [2021-05-03 14:11:14,200 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:14,200 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 1203 transitions. [2021-05-03 14:11:14,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:11:14,200 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:14,200 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:14,414 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10781 [2021-05-03 14:11:14,415 INFO L428 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:14,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:14,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1489038121, now seen corresponding path program 135 times [2021-05-03 14:11:14,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:14,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731809602] [2021-05-03 14:11:14,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:14,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:14,473 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:14,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731809602] [2021-05-03 14:11:14,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919918990] [2021-05-03 14:11:14,473 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 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:14,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 14:11:14,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:14,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:11:14,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:14,531 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:14,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:14,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-05-03 14:11:14,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704561809] [2021-05-03 14:11:14,532 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:11:14,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:14,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:11:14,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:11:14,532 INFO L87 Difference]: Start difference. First operand 394 states and 1203 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:14,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:14,689 INFO L93 Difference]: Finished difference Result 594 states and 1635 transitions. [2021-05-03 14:11:14,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:11:14,689 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 18 [2021-05-03 14:11:14,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:14,690 INFO L225 Difference]: With dead ends: 594 [2021-05-03 14:11:14,690 INFO L226 Difference]: Without dead ends: 594 [2021-05-03 14:11:14,690 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 144.8ms TimeCoverageRelationStatistics Valid=177, Invalid=329, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:11:14,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-05-03 14:11:14,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 403. [2021-05-03 14:11:14,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 3.0597014925373136) internal successors, (1230), 402 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:14,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 1230 transitions. [2021-05-03 14:11:14,695 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 1230 transitions. Word has length 18 [2021-05-03 14:11:14,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:14,695 INFO L480 AbstractCegarLoop]: Abstraction has 403 states and 1230 transitions. [2021-05-03 14:11:14,695 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:14,695 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 1230 transitions. [2021-05-03 14:11:14,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:11:14,695 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:14,695 INFO L551 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:14,910 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10782 [2021-05-03 14:11:14,910 INFO L428 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:14,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:14,910 INFO L82 PathProgramCache]: Analyzing trace with hash 610808602, now seen corresponding path program 136 times [2021-05-03 14:11:14,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:14,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241718534] [2021-05-03 14:11:14,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:14,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:14,964 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:14,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241718534] [2021-05-03 14:11:14,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490579101] [2021-05-03 14:11:14,965 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 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:15,001 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:11:15,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:15,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:11:15,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:15,042 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:15,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:15,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-05-03 14:11:15,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129019104] [2021-05-03 14:11:15,043 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:11:15,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:15,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:11:15,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:11:15,043 INFO L87 Difference]: Start difference. First operand 403 states and 1230 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) 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) [2021-05-03 14:11:15,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:15,148 INFO L93 Difference]: Finished difference Result 532 states and 1448 transitions. [2021-05-03 14:11:15,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:11:15,149 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) 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 19 [2021-05-03 14:11:15,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:15,149 INFO L225 Difference]: With dead ends: 532 [2021-05-03 14:11:15,149 INFO L226 Difference]: Without dead ends: 532 [2021-05-03 14:11:15,149 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 92.7ms TimeCoverageRelationStatistics Valid=125, Invalid=217, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:11:15,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-05-03 14:11:15,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 415. [2021-05-03 14:11:15,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 3.07487922705314) internal successors, (1273), 414 states have internal predecessors, (1273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:15,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 1273 transitions. [2021-05-03 14:11:15,154 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 1273 transitions. Word has length 19 [2021-05-03 14:11:15,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:15,154 INFO L480 AbstractCegarLoop]: Abstraction has 415 states and 1273 transitions. [2021-05-03 14:11:15,154 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) 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) [2021-05-03 14:11:15,154 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 1273 transitions. [2021-05-03 14:11:15,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:11:15,154 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:15,154 INFO L551 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:15,369 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10783 [2021-05-03 14:11:15,369 INFO L428 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:15,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:15,370 INFO L82 PathProgramCache]: Analyzing trace with hash 522898661, now seen corresponding path program 137 times [2021-05-03 14:11:15,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:15,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745111086] [2021-05-03 14:11:15,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:15,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:15,423 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:15,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745111086] [2021-05-03 14:11:15,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785006875] [2021-05-03 14:11:15,423 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:11:15,448 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 14:11:15,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:15,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:11:15,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:15,482 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:15,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:15,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-05-03 14:11:15,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168679303] [2021-05-03 14:11:15,483 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:11:15,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:15,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:11:15,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:11:15,483 INFO L87 Difference]: Start difference. First operand 415 states and 1273 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) 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) [2021-05-03 14:11:15,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:15,701 INFO L93 Difference]: Finished difference Result 606 states and 1593 transitions. [2021-05-03 14:11:15,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:11:15,701 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) 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 19 [2021-05-03 14:11:15,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:15,702 INFO L225 Difference]: With dead ends: 606 [2021-05-03 14:11:15,702 INFO L226 Difference]: Without dead ends: 597 [2021-05-03 14:11:15,702 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 152.4ms TimeCoverageRelationStatistics Valid=210, Invalid=390, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:11:15,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2021-05-03 14:11:15,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 419. [2021-05-03 14:11:15,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 418 states have (on average 3.0717703349282295) internal successors, (1284), 418 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:15,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 1284 transitions. [2021-05-03 14:11:15,707 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 1284 transitions. Word has length 19 [2021-05-03 14:11:15,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:15,707 INFO L480 AbstractCegarLoop]: Abstraction has 419 states and 1284 transitions. [2021-05-03 14:11:15,707 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) 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) [2021-05-03 14:11:15,707 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 1284 transitions. [2021-05-03 14:11:15,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:11:15,707 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:15,707 INFO L551 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:15,922 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10784 [2021-05-03 14:11:15,923 INFO L428 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:15,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:15,923 INFO L82 PathProgramCache]: Analyzing trace with hash -544341384, now seen corresponding path program 138 times [2021-05-03 14:11:15,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:15,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720752706] [2021-05-03 14:11:15,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:15,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:15,986 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 23 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:15,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720752706] [2021-05-03 14:11:15,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160207801] [2021-05-03 14:11:15,986 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 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:16,006 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:11:16,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:16,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:11:16,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:16,041 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 29 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:16,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:16,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-05-03 14:11:16,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354393319] [2021-05-03 14:11:16,041 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:11:16,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:16,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:11:16,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:11:16,042 INFO L87 Difference]: Start difference. First operand 419 states and 1284 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:16,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:16,174 INFO L93 Difference]: Finished difference Result 466 states and 1355 transitions. [2021-05-03 14:11:16,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:11:16,175 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 19 [2021-05-03 14:11:16,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:16,176 INFO L225 Difference]: With dead ends: 466 [2021-05-03 14:11:16,176 INFO L226 Difference]: Without dead ends: 462 [2021-05-03 14:11:16,176 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 102.8ms TimeCoverageRelationStatistics Valid=138, Invalid=242, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:11:16,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-05-03 14:11:16,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 421. [2021-05-03 14:11:16,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 3.057142857142857) internal successors, (1284), 420 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:16,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 1284 transitions. [2021-05-03 14:11:16,180 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 1284 transitions. Word has length 19 [2021-05-03 14:11:16,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:16,180 INFO L480 AbstractCegarLoop]: Abstraction has 421 states and 1284 transitions. [2021-05-03 14:11:16,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:16,180 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 1284 transitions. [2021-05-03 14:11:16,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:11:16,181 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:16,181 INFO L551 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:16,395 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10785 [2021-05-03 14:11:16,396 INFO L428 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:16,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:16,396 INFO L82 PathProgramCache]: Analyzing trace with hash 2114601783, now seen corresponding path program 139 times [2021-05-03 14:11:16,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:16,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37428679] [2021-05-03 14:11:16,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:16,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:16,443 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:16,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37428679] [2021-05-03 14:11:16,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066676369] [2021-05-03 14:11:16,443 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:16,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:16,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:11:16,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:16,505 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:16,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:16,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-05-03 14:11:16,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056640655] [2021-05-03 14:11:16,505 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:11:16,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:16,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:11:16,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:11:16,505 INFO L87 Difference]: Start difference. First operand 421 states and 1284 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:16,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:16,572 INFO L93 Difference]: Finished difference Result 597 states and 1562 transitions. [2021-05-03 14:11:16,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:11:16,572 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 19 [2021-05-03 14:11:16,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:16,573 INFO L225 Difference]: With dead ends: 597 [2021-05-03 14:11:16,573 INFO L226 Difference]: Without dead ends: 597 [2021-05-03 14:11:16,573 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 52.7ms TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:11:16,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2021-05-03 14:11:16,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 407. [2021-05-03 14:11:16,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 3.0320197044334973) internal successors, (1231), 406 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:16,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 1231 transitions. [2021-05-03 14:11:16,588 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 1231 transitions. Word has length 19 [2021-05-03 14:11:16,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:16,588 INFO L480 AbstractCegarLoop]: Abstraction has 407 states and 1231 transitions. [2021-05-03 14:11:16,588 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:16,588 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 1231 transitions. [2021-05-03 14:11:16,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:11:16,588 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:16,588 INFO L551 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:16,801 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10786,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:16,801 INFO L428 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:16,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:16,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1564318246, now seen corresponding path program 140 times [2021-05-03 14:11:16,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:16,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123251794] [2021-05-03 14:11:16,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:16,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:16,884 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 19 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:16,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123251794] [2021-05-03 14:11:16,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824061275] [2021-05-03 14:11:16,884 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 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:16,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:11:16,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:16,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:11:16,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:16,937 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:16,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:16,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-05-03 14:11:16,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108467570] [2021-05-03 14:11:16,938 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:11:16,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:16,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:11:16,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:11:16,938 INFO L87 Difference]: Start difference. First operand 407 states and 1231 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:17,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:17,088 INFO L93 Difference]: Finished difference Result 489 states and 1403 transitions. [2021-05-03 14:11:17,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:11:17,088 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 19 [2021-05-03 14:11:17,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:17,089 INFO L225 Difference]: With dead ends: 489 [2021-05-03 14:11:17,089 INFO L226 Difference]: Without dead ends: 485 [2021-05-03 14:11:17,089 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 96.9ms TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:11:17,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2021-05-03 14:11:17,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 418. [2021-05-03 14:11:17,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 417 states have (on average 3.0239808153477217) internal successors, (1261), 417 states have internal predecessors, (1261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:17,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 1261 transitions. [2021-05-03 14:11:17,094 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 1261 transitions. Word has length 19 [2021-05-03 14:11:17,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:17,094 INFO L480 AbstractCegarLoop]: Abstraction has 418 states and 1261 transitions. [2021-05-03 14:11:17,094 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:17,094 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 1261 transitions. [2021-05-03 14:11:17,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:11:17,095 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:17,095 INFO L551 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:17,309 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10787,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:17,309 INFO L428 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:17,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:17,310 INFO L82 PathProgramCache]: Analyzing trace with hash 672996615, now seen corresponding path program 141 times [2021-05-03 14:11:17,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:17,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148880734] [2021-05-03 14:11:17,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:17,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:17,363 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:17,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148880734] [2021-05-03 14:11:17,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185574858] [2021-05-03 14:11:17,363 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 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:17,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 14:11:17,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:17,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:11:17,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:17,423 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:17,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:17,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-05-03 14:11:17,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261488340] [2021-05-03 14:11:17,424 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:11:17,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:17,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:11:17,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:11:17,424 INFO L87 Difference]: Start difference. First operand 418 states and 1261 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:17,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:17,511 INFO L93 Difference]: Finished difference Result 636 states and 1639 transitions. [2021-05-03 14:11:17,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:11:17,512 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 19 [2021-05-03 14:11:17,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:17,512 INFO L225 Difference]: With dead ends: 636 [2021-05-03 14:11:17,512 INFO L226 Difference]: Without dead ends: 636 [2021-05-03 14:11:17,513 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 69.5ms TimeCoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:11:17,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2021-05-03 14:11:17,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 405. [2021-05-03 14:11:17,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 3.0024752475247523) internal successors, (1213), 404 states have internal predecessors, (1213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:17,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 1213 transitions. [2021-05-03 14:11:17,518 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 1213 transitions. Word has length 19 [2021-05-03 14:11:17,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:17,518 INFO L480 AbstractCegarLoop]: Abstraction has 405 states and 1213 transitions. [2021-05-03 14:11:17,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:17,518 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 1213 transitions. [2021-05-03 14:11:17,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:11:17,518 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:17,518 INFO L551 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:17,731 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10788 [2021-05-03 14:11:17,731 INFO L428 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:17,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:17,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1786709960, now seen corresponding path program 142 times [2021-05-03 14:11:17,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:17,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389181475] [2021-05-03 14:11:17,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:17,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:17,780 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 17 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:17,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389181475] [2021-05-03 14:11:17,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623161581] [2021-05-03 14:11:17,781 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 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:17,800 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:11:17,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:17,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:11:17,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:17,835 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:17,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:17,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-05-03 14:11:17,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882064037] [2021-05-03 14:11:17,836 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:11:17,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:17,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:11:17,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:11:17,836 INFO L87 Difference]: Start difference. First operand 405 states and 1213 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:17,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:17,955 INFO L93 Difference]: Finished difference Result 488 states and 1377 transitions. [2021-05-03 14:11:17,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:11:17,956 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 19 [2021-05-03 14:11:17,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:17,956 INFO L225 Difference]: With dead ends: 488 [2021-05-03 14:11:17,956 INFO L226 Difference]: Without dead ends: 482 [2021-05-03 14:11:17,957 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 84.2ms TimeCoverageRelationStatistics Valid=106, Invalid=200, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:11:17,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-05-03 14:11:17,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 409. [2021-05-03 14:11:17,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.9901960784313726) internal successors, (1220), 408 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:17,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 1220 transitions. [2021-05-03 14:11:17,961 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 1220 transitions. Word has length 19 [2021-05-03 14:11:17,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:17,961 INFO L480 AbstractCegarLoop]: Abstraction has 409 states and 1220 transitions. [2021-05-03 14:11:17,961 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:17,961 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 1220 transitions. [2021-05-03 14:11:17,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:11:17,963 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:17,963 INFO L551 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:18,177 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10789,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:18,177 INFO L428 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:18,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:18,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1067090633, now seen corresponding path program 143 times [2021-05-03 14:11:18,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:18,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196689459] [2021-05-03 14:11:18,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:18,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:18,221 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:18,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196689459] [2021-05-03 14:11:18,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247134992] [2021-05-03 14:11:18,222 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 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:18,242 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 14:11:18,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:18,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:11:18,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:18,282 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:18,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:18,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-05-03 14:11:18,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889903037] [2021-05-03 14:11:18,282 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:11:18,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:18,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:11:18,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:11:18,283 INFO L87 Difference]: Start difference. First operand 409 states and 1220 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:18,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:18,397 INFO L93 Difference]: Finished difference Result 668 states and 1705 transitions. [2021-05-03 14:11:18,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:11:18,397 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 19 [2021-05-03 14:11:18,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:18,398 INFO L225 Difference]: With dead ends: 668 [2021-05-03 14:11:18,398 INFO L226 Difference]: Without dead ends: 668 [2021-05-03 14:11:18,398 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 85.3ms TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:11:18,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2021-05-03 14:11:18,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 429. [2021-05-03 14:11:18,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 3.0163551401869158) internal successors, (1291), 428 states have internal predecessors, (1291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:18,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 1291 transitions. [2021-05-03 14:11:18,403 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 1291 transitions. Word has length 19 [2021-05-03 14:11:18,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:18,403 INFO L480 AbstractCegarLoop]: Abstraction has 429 states and 1291 transitions. [2021-05-03 14:11:18,403 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:18,403 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 1291 transitions. [2021-05-03 14:11:18,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:11:18,404 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:18,404 INFO L551 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:18,619 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10790,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:18,619 INFO L428 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:18,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:18,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1705598054, now seen corresponding path program 144 times [2021-05-03 14:11:18,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:18,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839330244] [2021-05-03 14:11:18,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:18,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:18,682 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 17 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:18,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839330244] [2021-05-03 14:11:18,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064294695] [2021-05-03 14:11:18,682 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 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:18,715 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 14:11:18,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:18,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:11:18,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:18,747 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 20 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:18,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:18,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-05-03 14:11:18,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187744083] [2021-05-03 14:11:18,747 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:11:18,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:18,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:11:18,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:11:18,748 INFO L87 Difference]: Start difference. First operand 429 states and 1291 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:18,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:18,852 INFO L93 Difference]: Finished difference Result 521 states and 1480 transitions. [2021-05-03 14:11:18,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:11:18,852 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 19 [2021-05-03 14:11:18,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:18,853 INFO L225 Difference]: With dead ends: 521 [2021-05-03 14:11:18,853 INFO L226 Difference]: Without dead ends: 513 [2021-05-03 14:11:18,853 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 72.8ms TimeCoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:11:18,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-05-03 14:11:18,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 427. [2021-05-03 14:11:18,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 426 states have (on average 3.0211267605633805) internal successors, (1287), 426 states have internal predecessors, (1287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:18,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 1287 transitions. [2021-05-03 14:11:18,858 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 1287 transitions. Word has length 19 [2021-05-03 14:11:18,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:18,858 INFO L480 AbstractCegarLoop]: Abstraction has 427 states and 1287 transitions. [2021-05-03 14:11:18,858 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:18,858 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 1287 transitions. [2021-05-03 14:11:18,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:11:18,858 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:18,859 INFO L551 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:19,074 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10791,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:19,074 INFO L428 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:19,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:19,074 INFO L82 PathProgramCache]: Analyzing trace with hash 824779527, now seen corresponding path program 145 times [2021-05-03 14:11:19,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:19,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876431404] [2021-05-03 14:11:19,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:19,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:19,121 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:19,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876431404] [2021-05-03 14:11:19,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641485176] [2021-05-03 14:11:19,122 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:11:19,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:19,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:11:19,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:19,179 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:19,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:19,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-05-03 14:11:19,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366934894] [2021-05-03 14:11:19,180 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:11:19,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:19,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:11:19,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:11:19,180 INFO L87 Difference]: Start difference. First operand 427 states and 1287 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:19,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:19,348 INFO L93 Difference]: Finished difference Result 690 states and 1758 transitions. [2021-05-03 14:11:19,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:11:19,348 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 19 [2021-05-03 14:11:19,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:19,349 INFO L225 Difference]: With dead ends: 690 [2021-05-03 14:11:19,349 INFO L226 Difference]: Without dead ends: 690 [2021-05-03 14:11:19,349 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 121.8ms TimeCoverageRelationStatistics Valid=162, Invalid=300, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:11:19,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2021-05-03 14:11:19,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 427. [2021-05-03 14:11:19,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 426 states have (on average 3.0211267605633805) internal successors, (1287), 426 states have internal predecessors, (1287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:19,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 1287 transitions. [2021-05-03 14:11:19,354 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 1287 transitions. Word has length 19 [2021-05-03 14:11:19,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:19,354 INFO L480 AbstractCegarLoop]: Abstraction has 427 states and 1287 transitions. [2021-05-03 14:11:19,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:19,355 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 1287 transitions. [2021-05-03 14:11:19,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:11:19,355 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:19,355 INFO L551 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:19,565 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10792 [2021-05-03 14:11:19,565 INFO L428 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:19,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:19,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1044035814, now seen corresponding path program 146 times [2021-05-03 14:11:19,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:19,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409122508] [2021-05-03 14:11:19,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:19,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:19,601 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 14 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 14:11:19,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409122508] [2021-05-03 14:11:19,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768110902] [2021-05-03 14:11:19,602 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 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:19,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:11:19,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:19,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:11:19,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:19,656 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:11:19,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:19,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-05-03 14:11:19,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920743699] [2021-05-03 14:11:19,656 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 14:11:19,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:19,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 14:11:19,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:11:19,657 INFO L87 Difference]: Start difference. First operand 427 states and 1287 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:19,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:19,703 INFO L93 Difference]: Finished difference Result 587 states and 1642 transitions. [2021-05-03 14:11:19,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 14:11:19,704 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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 19 [2021-05-03 14:11:19,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:19,705 INFO L225 Difference]: With dead ends: 587 [2021-05-03 14:11:19,705 INFO L226 Difference]: Without dead ends: 587 [2021-05-03 14:11:19,705 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 34.2ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:11:19,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2021-05-03 14:11:19,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 451. [2021-05-03 14:11:19,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 450 states have (on average 3.0644444444444443) internal successors, (1379), 450 states have internal predecessors, (1379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:19,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 1379 transitions. [2021-05-03 14:11:19,710 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 1379 transitions. Word has length 19 [2021-05-03 14:11:19,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:19,710 INFO L480 AbstractCegarLoop]: Abstraction has 451 states and 1379 transitions. [2021-05-03 14:11:19,710 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:19,710 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 1379 transitions. [2021-05-03 14:11:19,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:11:19,710 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:19,710 INFO L551 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:19,917 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10793 [2021-05-03 14:11:19,917 INFO L428 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:19,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:19,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1821185413, now seen corresponding path program 147 times [2021-05-03 14:11:19,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:19,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999629251] [2021-05-03 14:11:19,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:19,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:19,973 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 14:11:19,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999629251] [2021-05-03 14:11:19,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828551369] [2021-05-03 14:11:19,973 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 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:19,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 14:11:19,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:19,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:11:19,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:20,025 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:11:20,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:20,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-05-03 14:11:20,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112155498] [2021-05-03 14:11:20,025 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 14:11:20,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:20,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 14:11:20,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:11:20,026 INFO L87 Difference]: Start difference. First operand 451 states and 1379 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:20,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:20,157 INFO L93 Difference]: Finished difference Result 581 states and 1594 transitions. [2021-05-03 14:11:20,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:11:20,158 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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 19 [2021-05-03 14:11:20,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:20,159 INFO L225 Difference]: With dead ends: 581 [2021-05-03 14:11:20,159 INFO L226 Difference]: Without dead ends: 579 [2021-05-03 14:11:20,159 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 54.0ms TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:11:20,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-05-03 14:11:20,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 466. [2021-05-03 14:11:20,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 465 states have (on average 3.0709677419354837) internal successors, (1428), 465 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:20,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 1428 transitions. [2021-05-03 14:11:20,164 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 1428 transitions. Word has length 19 [2021-05-03 14:11:20,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:20,164 INFO L480 AbstractCegarLoop]: Abstraction has 466 states and 1428 transitions. [2021-05-03 14:11:20,164 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:20,164 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 1428 transitions. [2021-05-03 14:11:20,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:11:20,164 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:20,164 INFO L551 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:20,369 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10794 [2021-05-03 14:11:20,369 INFO L428 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:20,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:20,369 INFO L82 PathProgramCache]: Analyzing trace with hash 2123535389, now seen corresponding path program 148 times [2021-05-03 14:11:20,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:20,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368110386] [2021-05-03 14:11:20,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:20,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:20,475 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:11:20,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368110386] [2021-05-03 14:11:20,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791642522] [2021-05-03 14:11:20,476 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 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:20,510 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:11:20,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:20,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:11:20,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:20,545 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 14:11:20,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:20,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-05-03 14:11:20,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548951919] [2021-05-03 14:11:20,546 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:11:20,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:20,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:11:20,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:11:20,548 INFO L87 Difference]: Start difference. First operand 466 states and 1428 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:20,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:20,618 INFO L93 Difference]: Finished difference Result 595 states and 1618 transitions. [2021-05-03 14:11:20,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 14:11:20,619 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 19 [2021-05-03 14:11:20,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:20,619 INFO L225 Difference]: With dead ends: 595 [2021-05-03 14:11:20,619 INFO L226 Difference]: Without dead ends: 595 [2021-05-03 14:11:20,620 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 82.6ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:11:20,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2021-05-03 14:11:20,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 465. [2021-05-03 14:11:20,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 3.0689655172413794) internal successors, (1424), 464 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:20,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 1424 transitions. [2021-05-03 14:11:20,625 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 1424 transitions. Word has length 19 [2021-05-03 14:11:20,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:20,625 INFO L480 AbstractCegarLoop]: Abstraction has 465 states and 1424 transitions. [2021-05-03 14:11:20,625 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:20,625 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 1424 transitions. [2021-05-03 14:11:20,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:11:20,625 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:20,625 INFO L551 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:20,840 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10795 [2021-05-03 14:11:20,840 INFO L428 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:20,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:20,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1633576329, now seen corresponding path program 149 times [2021-05-03 14:11:20,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:20,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287655848] [2021-05-03 14:11:20,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:20,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:20,881 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:20,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287655848] [2021-05-03 14:11:20,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732045215] [2021-05-03 14:11:20,881 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 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:20,902 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 14:11:20,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:20,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:11:20,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:20,937 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:11:20,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:20,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-05-03 14:11:20,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601519747] [2021-05-03 14:11:20,937 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:11:20,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:20,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:11:20,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:11:20,938 INFO L87 Difference]: Start difference. First operand 465 states and 1424 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:21,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:21,032 INFO L93 Difference]: Finished difference Result 631 states and 1678 transitions. [2021-05-03 14:11:21,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:11:21,032 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 19 [2021-05-03 14:11:21,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:21,033 INFO L225 Difference]: With dead ends: 631 [2021-05-03 14:11:21,033 INFO L226 Difference]: Without dead ends: 631 [2021-05-03 14:11:21,033 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 75.2ms TimeCoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:11:21,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2021-05-03 14:11:21,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 465. [2021-05-03 14:11:21,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 3.0689655172413794) internal successors, (1424), 464 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:21,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 1424 transitions. [2021-05-03 14:11:21,038 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 1424 transitions. Word has length 19 [2021-05-03 14:11:21,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:21,038 INFO L480 AbstractCegarLoop]: Abstraction has 465 states and 1424 transitions. [2021-05-03 14:11:21,038 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:21,038 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 1424 transitions. [2021-05-03 14:11:21,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:11:21,039 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:21,039 INFO L551 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:21,239 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10796,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:21,239 INFO L428 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:21,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:21,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1259104068, now seen corresponding path program 150 times [2021-05-03 14:11:21,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:21,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009727626] [2021-05-03 14:11:21,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:21,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:21,302 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 15 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:21,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009727626] [2021-05-03 14:11:21,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679346440] [2021-05-03 14:11:21,303 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 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:21,323 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:11:21,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:21,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:11:21,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:21,354 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 17 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:21,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:21,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-05-03 14:11:21,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800114864] [2021-05-03 14:11:21,354 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:11:21,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:21,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:11:21,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:11:21,355 INFO L87 Difference]: Start difference. First operand 465 states and 1424 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:21,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:21,487 INFO L93 Difference]: Finished difference Result 578 states and 1659 transitions. [2021-05-03 14:11:21,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:11:21,487 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 19 [2021-05-03 14:11:21,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:21,488 INFO L225 Difference]: With dead ends: 578 [2021-05-03 14:11:21,488 INFO L226 Difference]: Without dead ends: 570 [2021-05-03 14:11:21,488 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 85.8ms TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:11:21,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-05-03 14:11:21,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 469. [2021-05-03 14:11:21,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 3.0619658119658117) internal successors, (1433), 468 states have internal predecessors, (1433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:21,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 1433 transitions. [2021-05-03 14:11:21,493 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 1433 transitions. Word has length 19 [2021-05-03 14:11:21,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:21,493 INFO L480 AbstractCegarLoop]: Abstraction has 469 states and 1433 transitions. [2021-05-03 14:11:21,493 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:21,493 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 1433 transitions. [2021-05-03 14:11:21,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:11:21,494 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:21,494 INFO L551 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:21,696 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10797 [2021-05-03 14:11:21,697 INFO L428 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:21,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:21,697 INFO L82 PathProgramCache]: Analyzing trace with hash -2139922595, now seen corresponding path program 151 times [2021-05-03 14:11:21,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:21,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669869156] [2021-05-03 14:11:21,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:21,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:21,748 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:21,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669869156] [2021-05-03 14:11:21,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791689356] [2021-05-03 14:11:21,749 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 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:11:21,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:21,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:11:21,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:21,803 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:21,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:21,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-05-03 14:11:21,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068366299] [2021-05-03 14:11:21,816 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:11:21,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:21,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:11:21,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:11:21,817 INFO L87 Difference]: Start difference. First operand 469 states and 1433 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:21,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:21,983 INFO L93 Difference]: Finished difference Result 678 states and 1771 transitions. [2021-05-03 14:11:21,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:11:21,984 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 19 [2021-05-03 14:11:21,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:21,984 INFO L225 Difference]: With dead ends: 678 [2021-05-03 14:11:21,984 INFO L226 Difference]: Without dead ends: 678 [2021-05-03 14:11:21,984 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 126.5ms TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:11:21,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2021-05-03 14:11:21,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 469. [2021-05-03 14:11:21,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 3.0619658119658117) internal successors, (1433), 468 states have internal predecessors, (1433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:21,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 1433 transitions. [2021-05-03 14:11:21,990 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 1433 transitions. Word has length 19 [2021-05-03 14:11:21,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:21,990 INFO L480 AbstractCegarLoop]: Abstraction has 469 states and 1433 transitions. [2021-05-03 14:11:21,990 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:21,990 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 1433 transitions. [2021-05-03 14:11:21,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:11:21,990 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:21,990 INFO L551 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:22,197 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10798 [2021-05-03 14:11:22,197 INFO L428 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:22,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:22,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1702003208, now seen corresponding path program 152 times [2021-05-03 14:11:22,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:22,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689757419] [2021-05-03 14:11:22,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:22,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:22,258 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 19 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:22,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689757419] [2021-05-03 14:11:22,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284668389] [2021-05-03 14:11:22,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:22,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:11:22,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:22,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:11:22,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:22,331 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:22,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:22,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-05-03 14:11:22,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207277048] [2021-05-03 14:11:22,331 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:11:22,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:22,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:11:22,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:11:22,340 INFO L87 Difference]: Start difference. First operand 469 states and 1433 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) 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) [2021-05-03 14:11:22,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:22,471 INFO L93 Difference]: Finished difference Result 606 states and 1712 transitions. [2021-05-03 14:11:22,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:11:22,471 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) 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 19 [2021-05-03 14:11:22,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:22,472 INFO L225 Difference]: With dead ends: 606 [2021-05-03 14:11:22,472 INFO L226 Difference]: Without dead ends: 596 [2021-05-03 14:11:22,472 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 99.3ms TimeCoverageRelationStatistics Valid=117, Invalid=225, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:11:22,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2021-05-03 14:11:22,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 477. [2021-05-03 14:11:22,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 3.03781512605042) internal successors, (1446), 476 states have internal predecessors, (1446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:22,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 1446 transitions. [2021-05-03 14:11:22,478 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 1446 transitions. Word has length 19 [2021-05-03 14:11:22,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:22,478 INFO L480 AbstractCegarLoop]: Abstraction has 477 states and 1446 transitions. [2021-05-03 14:11:22,478 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) 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) [2021-05-03 14:11:22,478 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 1446 transitions. [2021-05-03 14:11:22,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:11:22,478 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:22,478 INFO L551 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:22,679 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10799,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:22,679 INFO L428 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:22,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:22,679 INFO L82 PathProgramCache]: Analyzing trace with hash -656787657, now seen corresponding path program 153 times [2021-05-03 14:11:22,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:22,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884916421] [2021-05-03 14:11:22,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:22,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:22,738 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:22,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884916421] [2021-05-03 14:11:22,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026641869] [2021-05-03 14:11:22,739 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 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:22,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 14:11:22,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:22,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:11:22,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:22,804 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:22,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:22,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-05-03 14:11:22,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230253575] [2021-05-03 14:11:22,804 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:11:22,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:22,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:11:22,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:11:22,805 INFO L87 Difference]: Start difference. First operand 477 states and 1446 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) 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) [2021-05-03 14:11:23,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:23,048 INFO L93 Difference]: Finished difference Result 741 states and 1915 transitions. [2021-05-03 14:11:23,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 14:11:23,048 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) 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 19 [2021-05-03 14:11:23,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:23,049 INFO L225 Difference]: With dead ends: 741 [2021-05-03 14:11:23,049 INFO L226 Difference]: Without dead ends: 741 [2021-05-03 14:11:23,049 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 192.7ms TimeCoverageRelationStatistics Valid=257, Invalid=499, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:11:23,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2021-05-03 14:11:23,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 466. [2021-05-03 14:11:23,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 465 states have (on average 3.0279569892473117) internal successors, (1408), 465 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:23,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 1408 transitions. [2021-05-03 14:11:23,054 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 1408 transitions. Word has length 19 [2021-05-03 14:11:23,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:23,054 INFO L480 AbstractCegarLoop]: Abstraction has 466 states and 1408 transitions. [2021-05-03 14:11:23,054 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) 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) [2021-05-03 14:11:23,054 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 1408 transitions. [2021-05-03 14:11:23,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:11:23,055 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:23,055 INFO L551 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:23,265 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10800,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:23,265 INFO L428 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:23,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:23,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1539478916, now seen corresponding path program 154 times [2021-05-03 14:11:23,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:23,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621911225] [2021-05-03 14:11:23,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:23,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:23,356 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 17 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:11:23,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621911225] [2021-05-03 14:11:23,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211608180] [2021-05-03 14:11:23,356 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 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 [2021-05-03 14:11:23,376 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:11:23,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:23,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:11:23,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:23,423 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 14:11:23,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:23,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-05-03 14:11:23,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7830114] [2021-05-03 14:11:23,423 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:11:23,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:23,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:11:23,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:11:23,423 INFO L87 Difference]: Start difference. First operand 466 states and 1408 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:23,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:23,508 INFO L93 Difference]: Finished difference Result 658 states and 1841 transitions. [2021-05-03 14:11:23,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 14:11:23,509 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 19 [2021-05-03 14:11:23,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:23,509 INFO L225 Difference]: With dead ends: 658 [2021-05-03 14:11:23,509 INFO L226 Difference]: Without dead ends: 658 [2021-05-03 14:11:23,510 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 56.6ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:11:23,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2021-05-03 14:11:23,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 506. [2021-05-03 14:11:23,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 3.091089108910891) internal successors, (1561), 505 states have internal predecessors, (1561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:23,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 1561 transitions. [2021-05-03 14:11:23,515 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 1561 transitions. Word has length 19 [2021-05-03 14:11:23,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:23,515 INFO L480 AbstractCegarLoop]: Abstraction has 506 states and 1561 transitions. [2021-05-03 14:11:23,515 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:23,515 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 1561 transitions. [2021-05-03 14:11:23,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:11:23,516 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:23,516 INFO L551 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:23,727 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10801,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:23,728 INFO L428 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:23,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:23,728 INFO L82 PathProgramCache]: Analyzing trace with hash 762329317, now seen corresponding path program 155 times [2021-05-03 14:11:23,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:23,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291978465] [2021-05-03 14:11:23,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:23,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:23,779 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:11:23,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291978465] [2021-05-03 14:11:23,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033887100] [2021-05-03 14:11:23,780 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 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:23,823 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 14:11:23,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:23,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:11:23,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:23,883 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 14:11:23,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:23,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-05-03 14:11:23,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421967692] [2021-05-03 14:11:23,884 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:11:23,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:23,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:11:23,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:11:23,884 INFO L87 Difference]: Start difference. First operand 506 states and 1561 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:24,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:24,009 INFO L93 Difference]: Finished difference Result 668 states and 1844 transitions. [2021-05-03 14:11:24,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:11:24,009 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 19 [2021-05-03 14:11:24,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:24,010 INFO L225 Difference]: With dead ends: 668 [2021-05-03 14:11:24,010 INFO L226 Difference]: Without dead ends: 666 [2021-05-03 14:11:24,010 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 72.8ms TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:11:24,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2021-05-03 14:11:24,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 524. [2021-05-03 14:11:24,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 523 states have (on average 3.108986615678776) internal successors, (1626), 523 states have internal predecessors, (1626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:24,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 1626 transitions. [2021-05-03 14:11:24,016 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 1626 transitions. Word has length 19 [2021-05-03 14:11:24,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:24,016 INFO L480 AbstractCegarLoop]: Abstraction has 524 states and 1626 transitions. [2021-05-03 14:11:24,016 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:24,016 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 1626 transitions. [2021-05-03 14:11:24,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:11:24,017 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:24,017 INFO L551 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:24,225 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10802 [2021-05-03 14:11:24,225 INFO L428 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:24,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:24,225 INFO L82 PathProgramCache]: Analyzing trace with hash -186000542, now seen corresponding path program 156 times [2021-05-03 14:11:24,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:24,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842167202] [2021-05-03 14:11:24,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:24,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:24,268 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 20 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:11:24,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842167202] [2021-05-03 14:11:24,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89254980] [2021-05-03 14:11:24,268 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:24,288 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 14:11:24,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:24,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:11:24,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:24,319 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 23 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 14:11:24,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:24,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-05-03 14:11:24,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132360429] [2021-05-03 14:11:24,319 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:11:24,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:24,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:11:24,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:11:24,320 INFO L87 Difference]: Start difference. First operand 524 states and 1626 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:24,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:24,427 INFO L93 Difference]: Finished difference Result 664 states and 1886 transitions. [2021-05-03 14:11:24,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:11:24,428 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 19 [2021-05-03 14:11:24,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:24,429 INFO L225 Difference]: With dead ends: 664 [2021-05-03 14:11:24,429 INFO L226 Difference]: Without dead ends: 662 [2021-05-03 14:11:24,429 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 67.7ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:11:24,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2021-05-03 14:11:24,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 524. [2021-05-03 14:11:24,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 523 states have (on average 3.107074569789675) internal successors, (1625), 523 states have internal predecessors, (1625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:24,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 1625 transitions. [2021-05-03 14:11:24,435 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 1625 transitions. Word has length 19 [2021-05-03 14:11:24,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:24,435 INFO L480 AbstractCegarLoop]: Abstraction has 524 states and 1625 transitions. [2021-05-03 14:11:24,435 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:24,435 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 1625 transitions. [2021-05-03 14:11:24,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:11:24,435 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:24,435 INFO L551 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:24,645 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10803,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:24,645 INFO L428 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:24,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:24,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1822024671, now seen corresponding path program 157 times [2021-05-03 14:11:24,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:24,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752785701] [2021-05-03 14:11:24,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:24,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:24,683 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:11:24,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752785701] [2021-05-03 14:11:24,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163808898] [2021-05-03 14:11:24,684 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 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:24,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:24,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:11:24,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:24,767 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 14:11:24,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:24,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-05-03 14:11:24,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682000588] [2021-05-03 14:11:24,768 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:11:24,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:24,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:11:24,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:11:24,768 INFO L87 Difference]: Start difference. First operand 524 states and 1625 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:24,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:24,827 INFO L93 Difference]: Finished difference Result 657 states and 1827 transitions. [2021-05-03 14:11:24,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 14:11:24,828 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 19 [2021-05-03 14:11:24,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:24,829 INFO L225 Difference]: With dead ends: 657 [2021-05-03 14:11:24,829 INFO L226 Difference]: Without dead ends: 657 [2021-05-03 14:11:24,829 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 41.3ms TimeCoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:11:24,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2021-05-03 14:11:24,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 524. [2021-05-03 14:11:24,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 523 states have (on average 3.1032504780114722) internal successors, (1623), 523 states have internal predecessors, (1623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:24,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 1623 transitions. [2021-05-03 14:11:24,834 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 1623 transitions. Word has length 19 [2021-05-03 14:11:24,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:24,835 INFO L480 AbstractCegarLoop]: Abstraction has 524 states and 1623 transitions. [2021-05-03 14:11:24,835 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:24,835 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 1623 transitions. [2021-05-03 14:11:24,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:11:24,835 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:24,835 INFO L551 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:25,036 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10804,171 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:25,036 INFO L428 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:25,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:25,036 INFO L82 PathProgramCache]: Analyzing trace with hash 949938401, now seen corresponding path program 158 times [2021-05-03 14:11:25,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:25,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916456586] [2021-05-03 14:11:25,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:25,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:25,100 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:25,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916456586] [2021-05-03 14:11:25,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624763858] [2021-05-03 14:11:25,100 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 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:25,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:11:25,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:25,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:11:25,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:25,164 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:11:25,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:25,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-05-03 14:11:25,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958383873] [2021-05-03 14:11:25,173 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:11:25,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:25,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:11:25,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:11:25,173 INFO L87 Difference]: Start difference. First operand 524 states and 1623 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:25,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:25,280 INFO L93 Difference]: Finished difference Result 654 states and 1817 transitions. [2021-05-03 14:11:25,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:11:25,280 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 19 [2021-05-03 14:11:25,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:25,281 INFO L225 Difference]: With dead ends: 654 [2021-05-03 14:11:25,281 INFO L226 Difference]: Without dead ends: 654 [2021-05-03 14:11:25,281 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 70.8ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:11:25,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2021-05-03 14:11:25,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 521. [2021-05-03 14:11:25,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 520 states have (on average 3.098076923076923) internal successors, (1611), 520 states have internal predecessors, (1611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:25,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 1611 transitions. [2021-05-03 14:11:25,286 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 1611 transitions. Word has length 19 [2021-05-03 14:11:25,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:25,286 INFO L480 AbstractCegarLoop]: Abstraction has 521 states and 1611 transitions. [2021-05-03 14:11:25,286 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:25,286 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 1611 transitions. [2021-05-03 14:11:25,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:11:25,287 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:25,287 INFO L551 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:25,487 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10805,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:25,488 INFO L428 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:25,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:25,488 INFO L82 PathProgramCache]: Analyzing trace with hash 1324410662, now seen corresponding path program 159 times [2021-05-03 14:11:25,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:25,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398824501] [2021-05-03 14:11:25,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:25,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:25,544 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 15 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:25,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398824501] [2021-05-03 14:11:25,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976586860] [2021-05-03 14:11:25,545 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 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:25,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 14:11:25,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:25,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:11:25,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:25,768 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 16 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:25,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:25,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-05-03 14:11:25,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468051084] [2021-05-03 14:11:25,769 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:11:25,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:25,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:11:25,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:11:25,769 INFO L87 Difference]: Start difference. First operand 521 states and 1611 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:25,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:25,908 INFO L93 Difference]: Finished difference Result 678 states and 1970 transitions. [2021-05-03 14:11:25,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:11:25,909 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 19 [2021-05-03 14:11:25,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:25,909 INFO L225 Difference]: With dead ends: 678 [2021-05-03 14:11:25,910 INFO L226 Difference]: Without dead ends: 670 [2021-05-03 14:11:25,910 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 95.2ms TimeCoverageRelationStatistics Valid=117, Invalid=225, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:11:25,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2021-05-03 14:11:25,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 544. [2021-05-03 14:11:25,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 543 states have (on average 3.1270718232044197) internal successors, (1698), 543 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:25,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 1698 transitions. [2021-05-03 14:11:25,916 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 1698 transitions. Word has length 19 [2021-05-03 14:11:25,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:25,916 INFO L480 AbstractCegarLoop]: Abstraction has 544 states and 1698 transitions. [2021-05-03 14:11:25,916 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:25,916 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 1698 transitions. [2021-05-03 14:11:25,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:11:25,917 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:25,917 INFO L551 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:26,133 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10806,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:26,133 INFO L428 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:26,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:26,133 INFO L82 PathProgramCache]: Analyzing trace with hash 443592135, now seen corresponding path program 160 times [2021-05-03 14:11:26,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:26,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988534792] [2021-05-03 14:11:26,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:26,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:26,178 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:26,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988534792] [2021-05-03 14:11:26,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110409248] [2021-05-03 14:11:26,179 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 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:26,198 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:11:26,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:26,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:11:26,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:26,232 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:26,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:26,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-05-03 14:11:26,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753915013] [2021-05-03 14:11:26,233 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:11:26,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:26,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:11:26,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:11:26,233 INFO L87 Difference]: Start difference. First operand 544 states and 1698 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:26,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:26,383 INFO L93 Difference]: Finished difference Result 717 states and 1973 transitions. [2021-05-03 14:11:26,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:11:26,383 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 19 [2021-05-03 14:11:26,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:26,384 INFO L225 Difference]: With dead ends: 717 [2021-05-03 14:11:26,384 INFO L226 Difference]: Without dead ends: 717 [2021-05-03 14:11:26,384 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 111.6ms TimeCoverageRelationStatistics Valid=146, Invalid=274, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:11:26,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2021-05-03 14:11:26,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 548. [2021-05-03 14:11:26,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 547 states have (on average 3.126142595978062) internal successors, (1710), 547 states have internal predecessors, (1710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:26,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 1710 transitions. [2021-05-03 14:11:26,401 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 1710 transitions. Word has length 19 [2021-05-03 14:11:26,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:26,401 INFO L480 AbstractCegarLoop]: Abstraction has 548 states and 1710 transitions. [2021-05-03 14:11:26,401 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:26,401 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 1710 transitions. [2021-05-03 14:11:26,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:11:26,402 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:26,402 INFO L551 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:26,617 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10807,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:26,617 INFO L428 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:26,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:26,617 INFO L82 PathProgramCache]: Analyzing trace with hash 881511522, now seen corresponding path program 161 times [2021-05-03 14:11:26,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:26,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036066514] [2021-05-03 14:11:26,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:26,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:26,685 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 18 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:26,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036066514] [2021-05-03 14:11:26,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366261778] [2021-05-03 14:11:26,685 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 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:26,705 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 14:11:26,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:26,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:11:26,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:26,797 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 19 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:26,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:26,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-05-03 14:11:26,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607347621] [2021-05-03 14:11:26,798 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:11:26,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:26,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:11:26,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:11:26,798 INFO L87 Difference]: Start difference. First operand 548 states and 1710 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) 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) [2021-05-03 14:11:26,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:26,946 INFO L93 Difference]: Finished difference Result 704 states and 2024 transitions. [2021-05-03 14:11:26,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:11:26,948 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) 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 19 [2021-05-03 14:11:26,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:26,949 INFO L225 Difference]: With dead ends: 704 [2021-05-03 14:11:26,949 INFO L226 Difference]: Without dead ends: 694 [2021-05-03 14:11:26,949 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 135.7ms TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:11:26,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2021-05-03 14:11:26,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 548. [2021-05-03 14:11:26,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 547 states have (on average 3.1243144424131626) internal successors, (1709), 547 states have internal predecessors, (1709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:26,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 1709 transitions. [2021-05-03 14:11:26,955 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 1709 transitions. Word has length 19 [2021-05-03 14:11:26,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:26,955 INFO L480 AbstractCegarLoop]: Abstraction has 548 states and 1709 transitions. [2021-05-03 14:11:26,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) 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) [2021-05-03 14:11:26,955 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 1709 transitions. [2021-05-03 14:11:26,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:11:26,956 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:26,956 INFO L551 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:27,156 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10808 [2021-05-03 14:11:27,157 INFO L428 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:27,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:27,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1926727073, now seen corresponding path program 162 times [2021-05-03 14:11:27,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:27,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383001142] [2021-05-03 14:11:27,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:27,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:27,209 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:27,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383001142] [2021-05-03 14:11:27,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154590487] [2021-05-03 14:11:27,209 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 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:27,234 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:11:27,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:27,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:11:27,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:27,276 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:27,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:27,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-05-03 14:11:27,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541060278] [2021-05-03 14:11:27,277 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:11:27,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:27,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:11:27,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:11:27,277 INFO L87 Difference]: Start difference. First operand 548 states and 1709 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) 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) [2021-05-03 14:11:27,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:27,499 INFO L93 Difference]: Finished difference Result 763 states and 2067 transitions. [2021-05-03 14:11:27,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:11:27,500 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) 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 19 [2021-05-03 14:11:27,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:27,501 INFO L225 Difference]: With dead ends: 763 [2021-05-03 14:11:27,501 INFO L226 Difference]: Without dead ends: 763 [2021-05-03 14:11:27,501 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 170.8ms TimeCoverageRelationStatistics Valid=240, Invalid=462, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:11:27,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763 states. [2021-05-03 14:11:27,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763 to 531. [2021-05-03 14:11:27,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 530 states have (on average 3.1245283018867926) internal successors, (1656), 530 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:27,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 1656 transitions. [2021-05-03 14:11:27,506 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 1656 transitions. Word has length 19 [2021-05-03 14:11:27,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:27,506 INFO L480 AbstractCegarLoop]: Abstraction has 531 states and 1656 transitions. [2021-05-03 14:11:27,507 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) 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) [2021-05-03 14:11:27,507 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 1656 transitions. [2021-05-03 14:11:27,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:11:27,507 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:27,507 INFO L551 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:27,722 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10809 [2021-05-03 14:11:27,722 INFO L428 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:27,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:27,722 INFO L82 PathProgramCache]: Analyzing trace with hash 36540070, now seen corresponding path program 163 times [2021-05-03 14:11:27,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:27,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421847625] [2021-05-03 14:11:27,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:27,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:27,780 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 23 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:27,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421847625] [2021-05-03 14:11:27,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282704271] [2021-05-03 14:11:27,780 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 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:27,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:27,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:11:27,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:27,837 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:27,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:27,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-05-03 14:11:27,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676214516] [2021-05-03 14:11:27,837 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:11:27,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:27,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:11:27,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:11:27,838 INFO L87 Difference]: Start difference. First operand 531 states and 1656 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) 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) [2021-05-03 14:11:27,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:27,910 INFO L93 Difference]: Finished difference Result 610 states and 1818 transitions. [2021-05-03 14:11:27,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:11:27,910 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) 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 19 [2021-05-03 14:11:27,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:27,911 INFO L225 Difference]: With dead ends: 610 [2021-05-03 14:11:27,911 INFO L226 Difference]: Without dead ends: 598 [2021-05-03 14:11:27,911 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 73.8ms TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:11:27,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2021-05-03 14:11:27,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 531. [2021-05-03 14:11:27,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 530 states have (on average 3.1226415094339623) internal successors, (1655), 530 states have internal predecessors, (1655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:27,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 1655 transitions. [2021-05-03 14:11:27,917 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 1655 transitions. Word has length 19 [2021-05-03 14:11:27,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:27,917 INFO L480 AbstractCegarLoop]: Abstraction has 531 states and 1655 transitions. [2021-05-03 14:11:27,917 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) 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) [2021-05-03 14:11:27,917 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 1655 transitions. [2021-05-03 14:11:27,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:11:27,917 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:27,918 INFO L551 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:28,129 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10810 [2021-05-03 14:11:28,129 INFO L428 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:28,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:28,129 INFO L82 PathProgramCache]: Analyzing trace with hash 659269895, now seen corresponding path program 164 times [2021-05-03 14:11:28,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:28,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125655613] [2021-05-03 14:11:28,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:28,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:28,180 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:28,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125655613] [2021-05-03 14:11:28,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174122324] [2021-05-03 14:11:28,181 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 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:28,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:11:28,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:28,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:11:28,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:28,243 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:28,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:28,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-05-03 14:11:28,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270686430] [2021-05-03 14:11:28,244 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:11:28,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:28,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:11:28,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:11:28,244 INFO L87 Difference]: Start difference. First operand 531 states and 1655 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) 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) [2021-05-03 14:11:28,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:28,493 INFO L93 Difference]: Finished difference Result 855 states and 2351 transitions. [2021-05-03 14:11:28,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:11:28,493 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) 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 19 [2021-05-03 14:11:28,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:28,494 INFO L225 Difference]: With dead ends: 855 [2021-05-03 14:11:28,494 INFO L226 Difference]: Without dead ends: 855 [2021-05-03 14:11:28,494 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 198.3ms TimeCoverageRelationStatistics Valid=292, Invalid=578, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:11:28,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2021-05-03 14:11:28,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 577. [2021-05-03 14:11:28,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 576 states have (on average 3.1180555555555554) internal successors, (1796), 576 states have internal predecessors, (1796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:28,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 1796 transitions. [2021-05-03 14:11:28,501 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 1796 transitions. Word has length 19 [2021-05-03 14:11:28,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:28,501 INFO L480 AbstractCegarLoop]: Abstraction has 577 states and 1796 transitions. [2021-05-03 14:11:28,501 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) 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) [2021-05-03 14:11:28,501 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 1796 transitions. [2021-05-03 14:11:28,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:11:28,501 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:28,501 INFO L551 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:28,717 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10811 [2021-05-03 14:11:28,717 INFO L428 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:28,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:28,717 INFO L82 PathProgramCache]: Analyzing trace with hash 24056922, now seen corresponding path program 165 times [2021-05-03 14:11:28,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:28,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467089145] [2021-05-03 14:11:28,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:28,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:28,763 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:28,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467089145] [2021-05-03 14:11:28,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790276317] [2021-05-03 14:11:28,763 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 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:28,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 14:11:28,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:28,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:11:28,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:28,828 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:11:28,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:28,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-05-03 14:11:28,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259656734] [2021-05-03 14:11:28,830 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:11:28,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:28,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:11:28,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:11:28,830 INFO L87 Difference]: Start difference. First operand 577 states and 1796 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:28,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:28,907 INFO L93 Difference]: Finished difference Result 817 states and 2337 transitions. [2021-05-03 14:11:28,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:11:28,908 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 19 [2021-05-03 14:11:28,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:28,909 INFO L225 Difference]: With dead ends: 817 [2021-05-03 14:11:28,909 INFO L226 Difference]: Without dead ends: 817 [2021-05-03 14:11:28,909 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 46.2ms TimeCoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:11:28,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2021-05-03 14:11:28,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 632. [2021-05-03 14:11:28,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 632 states, 631 states have (on average 3.172741679873217) internal successors, (2002), 631 states have internal predecessors, (2002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:28,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 2002 transitions. [2021-05-03 14:11:28,928 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 2002 transitions. Word has length 19 [2021-05-03 14:11:28,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:28,928 INFO L480 AbstractCegarLoop]: Abstraction has 632 states and 2002 transitions. [2021-05-03 14:11:28,928 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:28,928 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 2002 transitions. [2021-05-03 14:11:28,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:11:28,929 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:28,929 INFO L551 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:29,129 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10812,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:29,130 INFO L428 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:29,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:29,130 INFO L82 PathProgramCache]: Analyzing trace with hash -753092677, now seen corresponding path program 166 times [2021-05-03 14:11:29,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:29,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28682859] [2021-05-03 14:11:29,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:29,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:29,176 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:29,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28682859] [2021-05-03 14:11:29,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758334840] [2021-05-03 14:11:29,176 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 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:29,195 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:11:29,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:29,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:11:29,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:29,226 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:11:29,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:29,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-05-03 14:11:29,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030661058] [2021-05-03 14:11:29,227 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:11:29,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:29,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:11:29,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:11:29,228 INFO L87 Difference]: Start difference. First operand 632 states and 2002 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:29,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:29,374 INFO L93 Difference]: Finished difference Result 820 states and 2329 transitions. [2021-05-03 14:11:29,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:11:29,374 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 19 [2021-05-03 14:11:29,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:29,375 INFO L225 Difference]: With dead ends: 820 [2021-05-03 14:11:29,375 INFO L226 Difference]: Without dead ends: 818 [2021-05-03 14:11:29,375 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 87.3ms TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:11:29,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 818 states. [2021-05-03 14:11:29,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 818 to 649. [2021-05-03 14:11:29,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 649 states, 648 states have (on average 3.1882716049382718) internal successors, (2066), 648 states have internal predecessors, (2066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:29,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 2066 transitions. [2021-05-03 14:11:29,394 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 2066 transitions. Word has length 19 [2021-05-03 14:11:29,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:29,394 INFO L480 AbstractCegarLoop]: Abstraction has 649 states and 2066 transitions. [2021-05-03 14:11:29,394 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:29,394 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 2066 transitions. [2021-05-03 14:11:29,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:11:29,395 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:29,395 INFO L551 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:29,610 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10813,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:29,610 INFO L428 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:29,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:29,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1701422536, now seen corresponding path program 167 times [2021-05-03 14:11:29,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:29,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105054173] [2021-05-03 14:11:29,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:29,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:29,653 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:29,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105054173] [2021-05-03 14:11:29,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660607951] [2021-05-03 14:11:29,654 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:29,674 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 14:11:29,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:29,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:11:29,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:29,705 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:11:29,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:29,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-05-03 14:11:29,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526012199] [2021-05-03 14:11:29,705 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:11:29,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:29,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:11:29,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:11:29,706 INFO L87 Difference]: Start difference. First operand 649 states and 2066 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:29,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:29,922 INFO L93 Difference]: Finished difference Result 822 states and 2381 transitions. [2021-05-03 14:11:29,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:11:29,922 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 19 [2021-05-03 14:11:29,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:29,923 INFO L225 Difference]: With dead ends: 822 [2021-05-03 14:11:29,923 INFO L226 Difference]: Without dead ends: 820 [2021-05-03 14:11:29,923 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 78.2ms TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:11:29,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2021-05-03 14:11:29,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 629. [2021-05-03 14:11:29,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 628 states have (on average 3.1640127388535033) internal successors, (1987), 628 states have internal predecessors, (1987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:29,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 1987 transitions. [2021-05-03 14:11:29,930 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 1987 transitions. Word has length 19 [2021-05-03 14:11:29,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:29,930 INFO L480 AbstractCegarLoop]: Abstraction has 629 states and 1987 transitions. [2021-05-03 14:11:29,930 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:29,930 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 1987 transitions. [2021-05-03 14:11:29,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:11:29,931 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:29,931 INFO L551 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:30,148 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10814,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:30,149 INFO L428 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:30,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:30,149 INFO L82 PathProgramCache]: Analyzing trace with hash 957520631, now seen corresponding path program 168 times [2021-05-03 14:11:30,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:30,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775732725] [2021-05-03 14:11:30,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:30,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:30,187 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:30,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775732725] [2021-05-03 14:11:30,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533450423] [2021-05-03 14:11:30,187 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:30,206 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 14:11:30,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:30,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:11:30,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:30,240 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:11:30,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:30,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-05-03 14:11:30,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524342401] [2021-05-03 14:11:30,241 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:11:30,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:30,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:11:30,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:11:30,241 INFO L87 Difference]: Start difference. First operand 629 states and 1987 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:30,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:30,307 INFO L93 Difference]: Finished difference Result 797 states and 2254 transitions. [2021-05-03 14:11:30,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:11:30,308 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 19 [2021-05-03 14:11:30,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:30,309 INFO L225 Difference]: With dead ends: 797 [2021-05-03 14:11:30,309 INFO L226 Difference]: Without dead ends: 797 [2021-05-03 14:11:30,309 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 49.8ms TimeCoverageRelationStatistics Valid=74, Invalid=108, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:11:30,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2021-05-03 14:11:30,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 610. [2021-05-03 14:11:30,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 609 states have (on average 3.147783251231527) internal successors, (1917), 609 states have internal predecessors, (1917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:30,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 1917 transitions. [2021-05-03 14:11:30,315 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 1917 transitions. Word has length 19 [2021-05-03 14:11:30,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:30,315 INFO L480 AbstractCegarLoop]: Abstraction has 610 states and 1917 transitions. [2021-05-03 14:11:30,315 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:30,315 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 1917 transitions. [2021-05-03 14:11:30,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:11:30,316 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:30,316 INFO L551 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:30,516 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10815,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:30,517 INFO L428 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:30,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:30,517 INFO L82 PathProgramCache]: Analyzing trace with hash -212017540, now seen corresponding path program 169 times [2021-05-03 14:11:30,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:30,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948838537] [2021-05-03 14:11:30,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:30,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:30,561 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 20 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:30,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948838537] [2021-05-03 14:11:30,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052294003] [2021-05-03 14:11:30,562 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 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:30,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:30,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:11:30,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:30,611 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:11:30,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:30,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-05-03 14:11:30,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842963161] [2021-05-03 14:11:30,612 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:11:30,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:30,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:11:30,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:11:30,613 INFO L87 Difference]: Start difference. First operand 610 states and 1917 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:30,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:30,743 INFO L93 Difference]: Finished difference Result 795 states and 2316 transitions. [2021-05-03 14:11:30,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:11:30,743 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 19 [2021-05-03 14:11:30,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:30,744 INFO L225 Difference]: With dead ends: 795 [2021-05-03 14:11:30,744 INFO L226 Difference]: Without dead ends: 791 [2021-05-03 14:11:30,744 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 84.5ms TimeCoverageRelationStatistics Valid=109, Invalid=197, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:11:30,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2021-05-03 14:11:30,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 610. [2021-05-03 14:11:30,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 609 states have (on average 3.1461412151067325) internal successors, (1916), 609 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:30,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 1916 transitions. [2021-05-03 14:11:30,751 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 1916 transitions. Word has length 19 [2021-05-03 14:11:30,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:30,751 INFO L480 AbstractCegarLoop]: Abstraction has 610 states and 1916 transitions. [2021-05-03 14:11:30,751 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:30,751 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 1916 transitions. [2021-05-03 14:11:30,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:11:30,752 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:30,752 INFO L551 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:30,961 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10816,183 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:30,961 INFO L428 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:30,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:30,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1103339171, now seen corresponding path program 170 times [2021-05-03 14:11:30,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:30,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313148] [2021-05-03 14:11:30,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:30,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:30,999 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:30,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313148] [2021-05-03 14:11:30,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197843507] [2021-05-03 14:11:30,999 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 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:31,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:11:31,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:31,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:11:31,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:31,052 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:11:31,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:31,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-05-03 14:11:31,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924254266] [2021-05-03 14:11:31,053 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:11:31,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:31,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:11:31,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:11:31,053 INFO L87 Difference]: Start difference. First operand 610 states and 1916 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:31,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:31,132 INFO L93 Difference]: Finished difference Result 759 states and 2167 transitions. [2021-05-03 14:11:31,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:11:31,132 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 19 [2021-05-03 14:11:31,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:31,133 INFO L225 Difference]: With dead ends: 759 [2021-05-03 14:11:31,133 INFO L226 Difference]: Without dead ends: 759 [2021-05-03 14:11:31,133 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 57.7ms TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:11:31,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2021-05-03 14:11:31,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 557. [2021-05-03 14:11:31,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 556 states have (on average 3.134892086330935) internal successors, (1743), 556 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:31,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 1743 transitions. [2021-05-03 14:11:31,139 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 1743 transitions. Word has length 19 [2021-05-03 14:11:31,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:31,139 INFO L480 AbstractCegarLoop]: Abstraction has 557 states and 1743 transitions. [2021-05-03 14:11:31,139 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:31,139 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 1743 transitions. [2021-05-03 14:11:31,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:11:31,140 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:31,140 INFO L551 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:31,340 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10817,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:31,340 INFO L428 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:31,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:31,341 INFO L82 PathProgramCache]: Analyzing trace with hash -191011332, now seen corresponding path program 171 times [2021-05-03 14:11:31,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:31,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379251482] [2021-05-03 14:11:31,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:31,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:31,394 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 17 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:31,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379251482] [2021-05-03 14:11:31,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734929014] [2021-05-03 14:11:31,394 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 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:31,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:11:31,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:31,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:11:31,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:31,443 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 17 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:31,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:31,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-05-03 14:11:31,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430546099] [2021-05-03 14:11:31,444 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:11:31,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:31,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:11:31,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:11:31,444 INFO L87 Difference]: Start difference. First operand 557 states and 1743 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:31,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:31,562 INFO L93 Difference]: Finished difference Result 713 states and 2090 transitions. [2021-05-03 14:11:31,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:11:31,563 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 19 [2021-05-03 14:11:31,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:31,564 INFO L225 Difference]: With dead ends: 713 [2021-05-03 14:11:31,564 INFO L226 Difference]: Without dead ends: 705 [2021-05-03 14:11:31,564 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 91.4ms TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:11:31,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2021-05-03 14:11:31,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 580. [2021-05-03 14:11:31,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 579 states have (on average 3.153713298791019) internal successors, (1826), 579 states have internal predecessors, (1826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:31,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 1826 transitions. [2021-05-03 14:11:31,570 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 1826 transitions. Word has length 19 [2021-05-03 14:11:31,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:31,570 INFO L480 AbstractCegarLoop]: Abstraction has 580 states and 1826 transitions. [2021-05-03 14:11:31,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:31,570 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 1826 transitions. [2021-05-03 14:11:31,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:11:31,570 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:31,570 INFO L551 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:31,771 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10818,185 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:31,771 INFO L428 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:31,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:31,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1071829859, now seen corresponding path program 172 times [2021-05-03 14:11:31,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:31,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106722334] [2021-05-03 14:11:31,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:31,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:31,816 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:31,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106722334] [2021-05-03 14:11:31,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801435766] [2021-05-03 14:11:31,817 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:31,834 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:11:31,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:31,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:11:31,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:31,869 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:31,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:31,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-05-03 14:11:31,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729853605] [2021-05-03 14:11:31,869 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:11:31,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:31,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:11:31,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:11:31,869 INFO L87 Difference]: Start difference. First operand 580 states and 1826 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:31,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:31,975 INFO L93 Difference]: Finished difference Result 748 states and 2153 transitions. [2021-05-03 14:11:31,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:11:31,975 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 19 [2021-05-03 14:11:31,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:31,976 INFO L225 Difference]: With dead ends: 748 [2021-05-03 14:11:31,976 INFO L226 Difference]: Without dead ends: 748 [2021-05-03 14:11:31,977 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 88.0ms TimeCoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:11:31,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2021-05-03 14:11:31,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 605. [2021-05-03 14:11:31,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 604 states have (on average 3.1506622516556293) internal successors, (1903), 604 states have internal predecessors, (1903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:31,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 1903 transitions. [2021-05-03 14:11:31,983 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 1903 transitions. Word has length 19 [2021-05-03 14:11:31,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:31,983 INFO L480 AbstractCegarLoop]: Abstraction has 605 states and 1903 transitions. [2021-05-03 14:11:31,983 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:31,983 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 1903 transitions. [2021-05-03 14:11:31,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:11:31,983 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:31,984 INFO L551 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:32,184 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10819 [2021-05-03 14:11:32,184 INFO L428 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:32,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:32,184 INFO L82 PathProgramCache]: Analyzing trace with hash -633910472, now seen corresponding path program 173 times [2021-05-03 14:11:32,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:32,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877521696] [2021-05-03 14:11:32,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:32,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:32,242 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 19 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:32,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877521696] [2021-05-03 14:11:32,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288692993] [2021-05-03 14:11:32,242 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 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:32,260 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:11:32,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:32,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:11:32,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:32,300 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 19 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:32,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:32,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-05-03 14:11:32,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997477556] [2021-05-03 14:11:32,300 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:11:32,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:32,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:11:32,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:11:32,301 INFO L87 Difference]: Start difference. First operand 605 states and 1903 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) 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) [2021-05-03 14:11:32,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:32,456 INFO L93 Difference]: Finished difference Result 772 states and 2234 transitions. [2021-05-03 14:11:32,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:11:32,456 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) 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 19 [2021-05-03 14:11:32,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:32,457 INFO L225 Difference]: With dead ends: 772 [2021-05-03 14:11:32,457 INFO L226 Difference]: Without dead ends: 762 [2021-05-03 14:11:32,457 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 105.3ms TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:11:32,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2021-05-03 14:11:32,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 605. [2021-05-03 14:11:32,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 604 states have (on average 3.1490066225165565) internal successors, (1902), 604 states have internal predecessors, (1902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:32,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 1902 transitions. [2021-05-03 14:11:32,464 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 1902 transitions. Word has length 19 [2021-05-03 14:11:32,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:32,464 INFO L480 AbstractCegarLoop]: Abstraction has 605 states and 1902 transitions. [2021-05-03 14:11:32,464 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) 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) [2021-05-03 14:11:32,464 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 1902 transitions. [2021-05-03 14:11:32,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:11:32,465 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:32,465 INFO L551 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:32,666 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10820,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:32,666 INFO L428 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:32,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:32,667 INFO L82 PathProgramCache]: Analyzing trace with hash 411305079, now seen corresponding path program 174 times [2021-05-03 14:11:32,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:32,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097634185] [2021-05-03 14:11:32,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:32,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:32,718 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:32,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097634185] [2021-05-03 14:11:32,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520046528] [2021-05-03 14:11:32,719 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 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:32,737 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:11:32,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:32,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:11:32,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:32,781 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:32,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:32,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-05-03 14:11:32,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912471410] [2021-05-03 14:11:32,781 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:11:32,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:32,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:11:32,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:11:32,782 INFO L87 Difference]: Start difference. First operand 605 states and 1902 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) 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) [2021-05-03 14:11:32,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:32,953 INFO L93 Difference]: Finished difference Result 764 states and 2153 transitions. [2021-05-03 14:11:32,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:11:32,954 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) 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 19 [2021-05-03 14:11:32,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:32,955 INFO L225 Difference]: With dead ends: 764 [2021-05-03 14:11:32,955 INFO L226 Difference]: Without dead ends: 764 [2021-05-03 14:11:32,955 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 138.7ms TimeCoverageRelationStatistics Valid=204, Invalid=396, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:11:32,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2021-05-03 14:11:32,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 593. [2021-05-03 14:11:32,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 3.152027027027027) internal successors, (1866), 592 states have internal predecessors, (1866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:32,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1866 transitions. [2021-05-03 14:11:32,961 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1866 transitions. Word has length 19 [2021-05-03 14:11:32,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:32,961 INFO L480 AbstractCegarLoop]: Abstraction has 593 states and 1866 transitions. [2021-05-03 14:11:32,961 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) 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) [2021-05-03 14:11:32,961 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1866 transitions. [2021-05-03 14:11:32,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:11:32,962 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:32,962 INFO L551 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:33,172 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10821 [2021-05-03 14:11:33,173 INFO L428 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:33,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:33,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1478881924, now seen corresponding path program 175 times [2021-05-03 14:11:33,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:33,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378606411] [2021-05-03 14:11:33,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:33,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:33,231 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 23 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:33,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378606411] [2021-05-03 14:11:33,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503440843] [2021-05-03 14:11:33,232 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 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:33,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:33,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:11:33,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:33,288 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 23 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:33,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:33,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-05-03 14:11:33,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426815229] [2021-05-03 14:11:33,288 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:11:33,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:33,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:11:33,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:11:33,288 INFO L87 Difference]: Start difference. First operand 593 states and 1866 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) 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) [2021-05-03 14:11:33,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:33,364 INFO L93 Difference]: Finished difference Result 677 states and 2039 transitions. [2021-05-03 14:11:33,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:11:33,364 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) 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 19 [2021-05-03 14:11:33,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:33,365 INFO L225 Difference]: With dead ends: 677 [2021-05-03 14:11:33,365 INFO L226 Difference]: Without dead ends: 665 [2021-05-03 14:11:33,365 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 77.0ms TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:11:33,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2021-05-03 14:11:33,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 593. [2021-05-03 14:11:33,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 3.1503378378378377) internal successors, (1865), 592 states have internal predecessors, (1865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:33,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1865 transitions. [2021-05-03 14:11:33,372 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1865 transitions. Word has length 19 [2021-05-03 14:11:33,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:33,372 INFO L480 AbstractCegarLoop]: Abstraction has 593 states and 1865 transitions. [2021-05-03 14:11:33,372 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) 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) [2021-05-03 14:11:33,372 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1865 transitions. [2021-05-03 14:11:33,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:11:33,373 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:33,373 INFO L551 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:33,587 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10822,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:33,587 INFO L428 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:33,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:33,587 INFO L82 PathProgramCache]: Analyzing trace with hash -856152099, now seen corresponding path program 176 times [2021-05-03 14:11:33,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:33,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170431720] [2021-05-03 14:11:33,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:33,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:33,637 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:33,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170431720] [2021-05-03 14:11:33,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838579442] [2021-05-03 14:11:33,637 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 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:33,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:11:33,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:33,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:11:33,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:33,696 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:33,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:33,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-05-03 14:11:33,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54199048] [2021-05-03 14:11:33,697 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:11:33,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:33,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:11:33,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:11:33,697 INFO L87 Difference]: Start difference. First operand 593 states and 1865 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) 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) [2021-05-03 14:11:33,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:33,898 INFO L93 Difference]: Finished difference Result 742 states and 2108 transitions. [2021-05-03 14:11:33,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:11:33,899 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) 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 19 [2021-05-03 14:11:33,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:33,899 INFO L225 Difference]: With dead ends: 742 [2021-05-03 14:11:33,899 INFO L226 Difference]: Without dead ends: 742 [2021-05-03 14:11:33,900 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 166.5ms TimeCoverageRelationStatistics Valid=257, Invalid=499, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:11:33,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2021-05-03 14:11:33,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 587. [2021-05-03 14:11:33,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 586 states have (on average 3.151877133105802) internal successors, (1847), 586 states have internal predecessors, (1847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:33,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 1847 transitions. [2021-05-03 14:11:33,906 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 1847 transitions. Word has length 19 [2021-05-03 14:11:33,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:33,906 INFO L480 AbstractCegarLoop]: Abstraction has 587 states and 1847 transitions. [2021-05-03 14:11:33,906 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) 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) [2021-05-03 14:11:33,906 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 1847 transitions. [2021-05-03 14:11:33,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:11:33,907 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:33,907 INFO L551 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:34,107 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10823 [2021-05-03 14:11:34,107 INFO L428 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:34,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:34,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1903193160, now seen corresponding path program 177 times [2021-05-03 14:11:34,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:34,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449915382] [2021-05-03 14:11:34,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:34,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:34,164 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 29 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:34,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449915382] [2021-05-03 14:11:34,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048947340] [2021-05-03 14:11:34,164 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 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 [2021-05-03 14:11:34,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 14:11:34,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:34,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:11:34,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:34,222 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 29 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:34,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:34,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-05-03 14:11:34,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721184327] [2021-05-03 14:11:34,222 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:11:34,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:34,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:11:34,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:11:34,223 INFO L87 Difference]: Start difference. First operand 587 states and 1847 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) 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) [2021-05-03 14:11:34,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:34,280 INFO L93 Difference]: Finished difference Result 671 states and 2020 transitions. [2021-05-03 14:11:34,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:11:34,280 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) 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 19 [2021-05-03 14:11:34,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:34,281 INFO L225 Difference]: With dead ends: 671 [2021-05-03 14:11:34,281 INFO L226 Difference]: Without dead ends: 657 [2021-05-03 14:11:34,281 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 71.2ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:11:34,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2021-05-03 14:11:34,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 587. [2021-05-03 14:11:34,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 586 states have (on average 3.150170648464164) internal successors, (1846), 586 states have internal predecessors, (1846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:34,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 1846 transitions. [2021-05-03 14:11:34,287 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 1846 transitions. Word has length 19 [2021-05-03 14:11:34,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:34,287 INFO L480 AbstractCegarLoop]: Abstraction has 587 states and 1846 transitions. [2021-05-03 14:11:34,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) 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) [2021-05-03 14:11:34,287 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 1846 transitions. [2021-05-03 14:11:34,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:11:34,287 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:34,288 INFO L551 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:34,488 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10824,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:34,488 INFO L428 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:34,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:34,488 INFO L82 PathProgramCache]: Analyzing trace with hash -1492618953, now seen corresponding path program 178 times [2021-05-03 14:11:34,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:34,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516871399] [2021-05-03 14:11:34,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:34,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:34,544 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:34,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516871399] [2021-05-03 14:11:34,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222146232] [2021-05-03 14:11:34,544 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 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:34,562 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:11:34,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:34,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:11:34,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:34,604 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:34,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:34,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-05-03 14:11:34,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811115905] [2021-05-03 14:11:34,604 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:11:34,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:34,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:11:34,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:11:34,604 INFO L87 Difference]: Start difference. First operand 587 states and 1846 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) 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) [2021-05-03 14:11:34,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:34,804 INFO L93 Difference]: Finished difference Result 828 states and 2326 transitions. [2021-05-03 14:11:34,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:11:34,804 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) 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 19 [2021-05-03 14:11:34,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:34,805 INFO L225 Difference]: With dead ends: 828 [2021-05-03 14:11:34,805 INFO L226 Difference]: Without dead ends: 828 [2021-05-03 14:11:34,806 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 175.7ms TimeCoverageRelationStatistics Valid=275, Invalid=537, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:11:34,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2021-05-03 14:11:34,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 591. [2021-05-03 14:11:34,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 590 states have (on average 3.1491525423728812) internal successors, (1858), 590 states have internal predecessors, (1858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:34,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 1858 transitions. [2021-05-03 14:11:34,812 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 1858 transitions. Word has length 19 [2021-05-03 14:11:34,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:34,812 INFO L480 AbstractCegarLoop]: Abstraction has 591 states and 1858 transitions. [2021-05-03 14:11:34,812 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) 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) [2021-05-03 14:11:34,812 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 1858 transitions. [2021-05-03 14:11:34,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:11:34,813 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:34,813 INFO L551 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:35,013 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10825,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:35,013 INFO L428 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:35,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:35,014 INFO L82 PathProgramCache]: Analyzing trace with hash 290615364, now seen corresponding path program 179 times [2021-05-03 14:11:35,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:35,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843981139] [2021-05-03 14:11:35,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:35,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:35,067 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:35,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843981139] [2021-05-03 14:11:35,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158258776] [2021-05-03 14:11:35,067 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 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:35,097 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 14:11:35,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:35,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:11:35,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:35,132 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:35,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:35,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-05-03 14:11:35,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236242607] [2021-05-03 14:11:35,133 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:11:35,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:35,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:11:35,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:11:35,133 INFO L87 Difference]: Start difference. First operand 591 states and 1858 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:35,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:35,221 INFO L93 Difference]: Finished difference Result 869 states and 2474 transitions. [2021-05-03 14:11:35,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:11:35,222 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) 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 19 [2021-05-03 14:11:35,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:35,223 INFO L225 Difference]: With dead ends: 869 [2021-05-03 14:11:35,223 INFO L226 Difference]: Without dead ends: 869 [2021-05-03 14:11:35,223 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 53.5ms TimeCoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:11:35,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 869 states. [2021-05-03 14:11:35,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 869 to 667. [2021-05-03 14:11:35,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 667 states, 666 states have (on average 3.205705705705706) internal successors, (2135), 666 states have internal predecessors, (2135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:35,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 2135 transitions. [2021-05-03 14:11:35,231 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 2135 transitions. Word has length 19 [2021-05-03 14:11:35,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:35,231 INFO L480 AbstractCegarLoop]: Abstraction has 667 states and 2135 transitions. [2021-05-03 14:11:35,231 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:35,231 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 2135 transitions. [2021-05-03 14:11:35,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:11:35,232 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:35,232 INFO L551 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:35,432 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10826,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:35,432 INFO L428 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:35,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:35,433 INFO L82 PathProgramCache]: Analyzing trace with hash -486534235, now seen corresponding path program 180 times [2021-05-03 14:11:35,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:35,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934250015] [2021-05-03 14:11:35,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:35,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:35,515 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:35,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934250015] [2021-05-03 14:11:35,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914085605] [2021-05-03 14:11:35,516 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 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:35,536 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 14:11:35,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:35,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:11:35,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:35,573 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:35,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:35,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-05-03 14:11:35,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838185961] [2021-05-03 14:11:35,573 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:11:35,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:35,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:11:35,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:11:35,574 INFO L87 Difference]: Start difference. First operand 667 states and 2135 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:35,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:35,748 INFO L93 Difference]: Finished difference Result 878 states and 2501 transitions. [2021-05-03 14:11:35,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:11:35,749 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) 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 19 [2021-05-03 14:11:35,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:35,750 INFO L225 Difference]: With dead ends: 878 [2021-05-03 14:11:35,750 INFO L226 Difference]: Without dead ends: 876 [2021-05-03 14:11:35,750 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 130.6ms TimeCoverageRelationStatistics Valid=141, Invalid=239, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:11:35,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 876 states. [2021-05-03 14:11:35,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 876 to 684. [2021-05-03 14:11:35,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 683 states have (on average 3.2225475841874083) internal successors, (2201), 683 states have internal predecessors, (2201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:35,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 2201 transitions. [2021-05-03 14:11:35,757 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 2201 transitions. Word has length 19 [2021-05-03 14:11:35,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:35,757 INFO L480 AbstractCegarLoop]: Abstraction has 684 states and 2201 transitions. [2021-05-03 14:11:35,757 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:35,757 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 2201 transitions. [2021-05-03 14:11:35,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:11:35,758 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:35,758 INFO L551 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:35,958 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10827,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:35,958 INFO L428 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:35,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:35,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1434864094, now seen corresponding path program 181 times [2021-05-03 14:11:35,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:35,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264628808] [2021-05-03 14:11:35,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:35,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:36,007 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 29 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:36,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264628808] [2021-05-03 14:11:36,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642459796] [2021-05-03 14:11:36,007 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:36,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:36,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:11:36,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:36,062 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 30 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:36,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:36,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-05-03 14:11:36,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486709794] [2021-05-03 14:11:36,063 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:11:36,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:36,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:11:36,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:11:36,063 INFO L87 Difference]: Start difference. First operand 684 states and 2201 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:36,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:36,224 INFO L93 Difference]: Finished difference Result 876 states and 2523 transitions. [2021-05-03 14:11:36,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:11:36,224 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) 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 19 [2021-05-03 14:11:36,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:36,225 INFO L225 Difference]: With dead ends: 876 [2021-05-03 14:11:36,225 INFO L226 Difference]: Without dead ends: 874 [2021-05-03 14:11:36,225 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 95.0ms TimeCoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:11:36,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2021-05-03 14:11:36,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 669. [2021-05-03 14:11:36,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 669 states, 668 states have (on average 3.2050898203592815) internal successors, (2141), 668 states have internal predecessors, (2141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:36,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 2141 transitions. [2021-05-03 14:11:36,232 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 2141 transitions. Word has length 19 [2021-05-03 14:11:36,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:36,232 INFO L480 AbstractCegarLoop]: Abstraction has 669 states and 2141 transitions. [2021-05-03 14:11:36,232 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:36,233 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 2141 transitions. [2021-05-03 14:11:36,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:11:36,233 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:36,233 INFO L551 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:36,433 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10828 [2021-05-03 14:11:36,434 INFO L428 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:36,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:36,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1224079073, now seen corresponding path program 182 times [2021-05-03 14:11:36,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:36,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677147745] [2021-05-03 14:11:36,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:36,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:36,489 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:36,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677147745] [2021-05-03 14:11:36,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438752756] [2021-05-03 14:11:36,489 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 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:36,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:11:36,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:36,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:11:36,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:36,544 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:36,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:36,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-05-03 14:11:36,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633296408] [2021-05-03 14:11:36,544 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:11:36,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:36,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:11:36,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:11:36,544 INFO L87 Difference]: Start difference. First operand 669 states and 2141 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:36,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:36,643 INFO L93 Difference]: Finished difference Result 868 states and 2462 transitions. [2021-05-03 14:11:36,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:11:36,643 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) 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 19 [2021-05-03 14:11:36,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:36,644 INFO L225 Difference]: With dead ends: 868 [2021-05-03 14:11:36,644 INFO L226 Difference]: Without dead ends: 868 [2021-05-03 14:11:36,645 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 82.7ms TimeCoverageRelationStatistics Valid=97, Invalid=143, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:11:36,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2021-05-03 14:11:36,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 674. [2021-05-03 14:11:36,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 674 states, 673 states have (on average 3.2005943536404162) internal successors, (2154), 673 states have internal predecessors, (2154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:36,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 674 states to 674 states and 2154 transitions. [2021-05-03 14:11:36,652 INFO L78 Accepts]: Start accepts. Automaton has 674 states and 2154 transitions. Word has length 19 [2021-05-03 14:11:36,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:36,652 INFO L480 AbstractCegarLoop]: Abstraction has 674 states and 2154 transitions. [2021-05-03 14:11:36,652 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:36,652 INFO L276 IsEmpty]: Start isEmpty. Operand 674 states and 2154 transitions. [2021-05-03 14:11:36,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:11:36,652 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:36,652 INFO L551 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:36,853 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10829,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:36,853 INFO L428 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:36,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:36,853 INFO L82 PathProgramCache]: Analyzing trace with hash 54540902, now seen corresponding path program 183 times [2021-05-03 14:11:36,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:36,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133935914] [2021-05-03 14:11:36,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:36,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:36,906 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:36,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133935914] [2021-05-03 14:11:36,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721129344] [2021-05-03 14:11:36,906 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 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:36,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 14:11:36,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:36,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:11:36,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:36,970 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 25 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:36,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:36,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-05-03 14:11:36,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821226656] [2021-05-03 14:11:36,971 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:11:36,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:36,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:11:36,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:11:36,971 INFO L87 Difference]: Start difference. First operand 674 states and 2154 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:37,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:37,104 INFO L93 Difference]: Finished difference Result 905 states and 2624 transitions. [2021-05-03 14:11:37,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:11:37,104 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) 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 19 [2021-05-03 14:11:37,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:37,105 INFO L225 Difference]: With dead ends: 905 [2021-05-03 14:11:37,105 INFO L226 Difference]: Without dead ends: 901 [2021-05-03 14:11:37,106 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 90.2ms TimeCoverageRelationStatistics Valid=136, Invalid=244, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:11:37,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 901 states. [2021-05-03 14:11:37,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 901 to 674. [2021-05-03 14:11:37,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 674 states, 673 states have (on average 3.199108469539376) internal successors, (2153), 673 states have internal predecessors, (2153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:37,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 674 states to 674 states and 2153 transitions. [2021-05-03 14:11:37,122 INFO L78 Accepts]: Start accepts. Automaton has 674 states and 2153 transitions. Word has length 19 [2021-05-03 14:11:37,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:37,122 INFO L480 AbstractCegarLoop]: Abstraction has 674 states and 2153 transitions. [2021-05-03 14:11:37,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:37,122 INFO L276 IsEmpty]: Start isEmpty. Operand 674 states and 2153 transitions. [2021-05-03 14:11:37,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:11:37,123 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:37,123 INFO L551 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:37,323 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10830 [2021-05-03 14:11:37,323 INFO L428 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:37,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:37,324 INFO L82 PathProgramCache]: Analyzing trace with hash -836780729, now seen corresponding path program 184 times [2021-05-03 14:11:37,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:37,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621610936] [2021-05-03 14:11:37,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:37,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:37,379 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:37,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621610936] [2021-05-03 14:11:37,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641897743] [2021-05-03 14:11:37,380 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 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:37,397 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:11:37,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:37,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:11:37,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:37,440 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:37,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:37,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-05-03 14:11:37,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959764161] [2021-05-03 14:11:37,441 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:11:37,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:37,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:11:37,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:11:37,441 INFO L87 Difference]: Start difference. First operand 674 states and 2153 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:37,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:37,552 INFO L93 Difference]: Finished difference Result 858 states and 2461 transitions. [2021-05-03 14:11:37,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:11:37,553 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) 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 19 [2021-05-03 14:11:37,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:37,554 INFO L225 Difference]: With dead ends: 858 [2021-05-03 14:11:37,554 INFO L226 Difference]: Without dead ends: 858 [2021-05-03 14:11:37,554 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 96.6ms TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:11:37,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 858 states. [2021-05-03 14:11:37,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 858 to 687. [2021-05-03 14:11:37,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 686 states have (on average 3.2011661807580176) internal successors, (2196), 686 states have internal predecessors, (2196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:37,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 2196 transitions. [2021-05-03 14:11:37,562 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 2196 transitions. Word has length 19 [2021-05-03 14:11:37,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:37,562 INFO L480 AbstractCegarLoop]: Abstraction has 687 states and 2196 transitions. [2021-05-03 14:11:37,562 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:37,562 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 2196 transitions. [2021-05-03 14:11:37,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:11:37,563 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:37,563 INFO L551 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:37,776 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10831 [2021-05-03 14:11:37,777 INFO L428 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:37,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:37,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1018544478, now seen corresponding path program 185 times [2021-05-03 14:11:37,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:37,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061216759] [2021-05-03 14:11:37,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:37,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:37,831 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:37,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061216759] [2021-05-03 14:11:37,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361336623] [2021-05-03 14:11:37,831 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 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:37,849 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:11:37,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:37,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:11:37,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:37,881 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 22 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:37,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:37,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-05-03 14:11:37,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003133294] [2021-05-03 14:11:37,881 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:11:37,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:37,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:11:37,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:11:37,882 INFO L87 Difference]: Start difference. First operand 687 states and 2196 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:38,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:38,029 INFO L93 Difference]: Finished difference Result 936 states and 2753 transitions. [2021-05-03 14:11:38,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:11:38,030 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) 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 19 [2021-05-03 14:11:38,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:38,031 INFO L225 Difference]: With dead ends: 936 [2021-05-03 14:11:38,031 INFO L226 Difference]: Without dead ends: 930 [2021-05-03 14:11:38,031 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 105.7ms TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:11:38,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2021-05-03 14:11:38,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 695. [2021-05-03 14:11:38,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 694 states have (on average 3.2031700288184437) internal successors, (2223), 694 states have internal predecessors, (2223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:38,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 2223 transitions. [2021-05-03 14:11:38,039 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 2223 transitions. Word has length 19 [2021-05-03 14:11:38,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:38,039 INFO L480 AbstractCegarLoop]: Abstraction has 695 states and 2223 transitions. [2021-05-03 14:11:38,039 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:38,039 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 2223 transitions. [2021-05-03 14:11:38,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:11:38,049 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:38,049 INFO L551 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:38,260 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10832,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:38,261 INFO L428 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:38,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:38,261 INFO L82 PathProgramCache]: Analyzing trace with hash -298925151, now seen corresponding path program 186 times [2021-05-03 14:11:38,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:38,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6737888] [2021-05-03 14:11:38,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:38,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:38,314 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:38,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6737888] [2021-05-03 14:11:38,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200487752] [2021-05-03 14:11:38,314 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 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:38,333 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 14:11:38,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:38,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:11:38,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:38,369 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:38,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:38,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-05-03 14:11:38,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087865589] [2021-05-03 14:11:38,370 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:11:38,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:38,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:11:38,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:11:38,370 INFO L87 Difference]: Start difference. First operand 695 states and 2223 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:38,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:38,458 INFO L93 Difference]: Finished difference Result 835 states and 2456 transitions. [2021-05-03 14:11:38,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:11:38,458 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) 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 19 [2021-05-03 14:11:38,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:38,459 INFO L225 Difference]: With dead ends: 835 [2021-05-03 14:11:38,459 INFO L226 Difference]: Without dead ends: 835 [2021-05-03 14:11:38,459 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 88.2ms TimeCoverageRelationStatistics Valid=107, Invalid=199, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:11:38,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2021-05-03 14:11:38,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 707. [2021-05-03 14:11:38,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 707 states, 706 states have (on average 3.2011331444759206) internal successors, (2260), 706 states have internal predecessors, (2260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:38,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 2260 transitions. [2021-05-03 14:11:38,467 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 2260 transitions. Word has length 19 [2021-05-03 14:11:38,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:38,467 INFO L480 AbstractCegarLoop]: Abstraction has 707 states and 2260 transitions. [2021-05-03 14:11:38,467 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:38,467 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 2260 transitions. [2021-05-03 14:11:38,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:11:38,468 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:38,468 INFO L551 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:38,672 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10833 [2021-05-03 14:11:38,672 INFO L428 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:38,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:38,672 INFO L82 PathProgramCache]: Analyzing trace with hash 75547110, now seen corresponding path program 187 times [2021-05-03 14:11:38,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:38,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024641882] [2021-05-03 14:11:38,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:38,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:38,718 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 20 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:38,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024641882] [2021-05-03 14:11:38,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804263139] [2021-05-03 14:11:38,718 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 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:38,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:38,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:11:38,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:38,768 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 20 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:11:38,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:38,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-05-03 14:11:38,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685322059] [2021-05-03 14:11:38,769 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:11:38,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:38,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:11:38,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:11:38,769 INFO L87 Difference]: Start difference. First operand 707 states and 2260 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:38,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:38,895 INFO L93 Difference]: Finished difference Result 914 states and 2697 transitions. [2021-05-03 14:11:38,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:11:38,895 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) 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 19 [2021-05-03 14:11:38,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:38,896 INFO L225 Difference]: With dead ends: 914 [2021-05-03 14:11:38,897 INFO L226 Difference]: Without dead ends: 906 [2021-05-03 14:11:38,897 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 89.4ms TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:11:38,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2021-05-03 14:11:38,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 707. [2021-05-03 14:11:38,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 707 states, 706 states have (on average 3.198300283286119) internal successors, (2258), 706 states have internal predecessors, (2258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:38,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 2258 transitions. [2021-05-03 14:11:38,904 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 2258 transitions. Word has length 19 [2021-05-03 14:11:38,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:38,904 INFO L480 AbstractCegarLoop]: Abstraction has 707 states and 2258 transitions. [2021-05-03 14:11:38,904 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:38,904 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 2258 transitions. [2021-05-03 14:11:38,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:11:38,905 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:38,905 INFO L551 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:39,105 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10834,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:39,106 INFO L428 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:39,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:39,106 INFO L82 PathProgramCache]: Analyzing trace with hash -805271417, now seen corresponding path program 188 times [2021-05-03 14:11:39,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:39,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276966154] [2021-05-03 14:11:39,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:39,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:39,159 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:39,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276966154] [2021-05-03 14:11:39,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570275931] [2021-05-03 14:11:39,159 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 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:39,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:11:39,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:39,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:11:39,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:39,213 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:11:39,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:39,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-05-03 14:11:39,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332426081] [2021-05-03 14:11:39,213 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:11:39,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:39,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:11:39,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:11:39,213 INFO L87 Difference]: Start difference. First operand 707 states and 2258 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:39,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:39,295 INFO L93 Difference]: Finished difference Result 812 states and 2469 transitions. [2021-05-03 14:11:39,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:11:39,295 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) 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 19 [2021-05-03 14:11:39,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:39,296 INFO L225 Difference]: With dead ends: 812 [2021-05-03 14:11:39,296 INFO L226 Difference]: Without dead ends: 812 [2021-05-03 14:11:39,296 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 75.3ms TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:11:39,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2021-05-03 14:11:39,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 737. [2021-05-03 14:11:39,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 736 states have (on average 3.1956521739130435) internal successors, (2352), 736 states have internal predecessors, (2352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:39,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 2352 transitions. [2021-05-03 14:11:39,303 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 2352 transitions. Word has length 19 [2021-05-03 14:11:39,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:39,303 INFO L480 AbstractCegarLoop]: Abstraction has 737 states and 2352 transitions. [2021-05-03 14:11:39,303 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:39,303 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 2352 transitions. [2021-05-03 14:11:39,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:11:39,304 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:39,304 INFO L551 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:39,504 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10835 [2021-05-03 14:11:39,504 INFO L428 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:39,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:39,505 INFO L82 PathProgramCache]: Analyzing trace with hash -367352030, now seen corresponding path program 189 times [2021-05-03 14:11:39,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:39,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759405172] [2021-05-03 14:11:39,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:39,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:39,549 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:39,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759405172] [2021-05-03 14:11:39,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731986253] [2021-05-03 14:11:39,550 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 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:39,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:11:39,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:39,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:11:39,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:39,607 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:39,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:39,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-05-03 14:11:39,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144877349] [2021-05-03 14:11:39,607 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:11:39,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:39,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:11:39,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:11:39,608 INFO L87 Difference]: Start difference. First operand 737 states and 2352 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:39,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:39,740 INFO L93 Difference]: Finished difference Result 930 states and 2762 transitions. [2021-05-03 14:11:39,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:11:39,740 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:11:39,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:39,741 INFO L225 Difference]: With dead ends: 930 [2021-05-03 14:11:39,741 INFO L226 Difference]: Without dead ends: 920 [2021-05-03 14:11:39,742 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 101.2ms TimeCoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:11:39,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2021-05-03 14:11:39,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 766. [2021-05-03 14:11:39,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 766 states, 765 states have (on average 3.197385620915033) internal successors, (2446), 765 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:39,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 766 states to 766 states and 2446 transitions. [2021-05-03 14:11:39,750 INFO L78 Accepts]: Start accepts. Automaton has 766 states and 2446 transitions. Word has length 19 [2021-05-03 14:11:39,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:39,750 INFO L480 AbstractCegarLoop]: Abstraction has 766 states and 2446 transitions. [2021-05-03 14:11:39,750 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:39,750 INFO L276 IsEmpty]: Start isEmpty. Operand 766 states and 2446 transitions. [2021-05-03 14:11:39,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:11:39,751 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:39,751 INFO L551 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:39,951 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10836,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:39,951 INFO L428 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:39,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:39,951 INFO L82 PathProgramCache]: Analyzing trace with hash 677863521, now seen corresponding path program 190 times [2021-05-03 14:11:39,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:39,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69759964] [2021-05-03 14:11:39,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:39,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:40,017 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:40,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69759964] [2021-05-03 14:11:40,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285592678] [2021-05-03 14:11:40,017 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 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:40,034 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:11:40,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:40,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:11:40,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:40,078 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:40,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:40,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-05-03 14:11:40,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940126652] [2021-05-03 14:11:40,078 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:11:40,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:40,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:11:40,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:11:40,079 INFO L87 Difference]: Start difference. First operand 766 states and 2446 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:40,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:40,209 INFO L93 Difference]: Finished difference Result 870 states and 2608 transitions. [2021-05-03 14:11:40,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:11:40,210 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:11:40,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:40,211 INFO L225 Difference]: With dead ends: 870 [2021-05-03 14:11:40,211 INFO L226 Difference]: Without dead ends: 870 [2021-05-03 14:11:40,211 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 133.3ms TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:11:40,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 870 states. [2021-05-03 14:11:40,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 870 to 762. [2021-05-03 14:11:40,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 761 states have (on average 3.1984231274638635) internal successors, (2434), 761 states have internal predecessors, (2434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:40,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 2434 transitions. [2021-05-03 14:11:40,219 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 2434 transitions. Word has length 19 [2021-05-03 14:11:40,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:40,219 INFO L480 AbstractCegarLoop]: Abstraction has 762 states and 2434 transitions. [2021-05-03 14:11:40,219 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:40,219 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 2434 transitions. [2021-05-03 14:11:40,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:11:40,219 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:40,219 INFO L551 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:40,420 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10837,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:40,420 INFO L428 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:40,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:40,420 INFO L82 PathProgramCache]: Analyzing trace with hash -1212323482, now seen corresponding path program 191 times [2021-05-03 14:11:40,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:40,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440584160] [2021-05-03 14:11:40,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:40,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:40,468 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:40,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440584160] [2021-05-03 14:11:40,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285080206] [2021-05-03 14:11:40,468 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 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:40,485 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:11:40,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:40,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:11:40,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:40,524 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:40,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:40,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-05-03 14:11:40,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400542499] [2021-05-03 14:11:40,525 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:11:40,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:40,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:11:40,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:11:40,525 INFO L87 Difference]: Start difference. First operand 762 states and 2434 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:40,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:40,608 INFO L93 Difference]: Finished difference Result 853 states and 2620 transitions. [2021-05-03 14:11:40,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:11:40,609 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:11:40,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:40,609 INFO L225 Difference]: With dead ends: 853 [2021-05-03 14:11:40,610 INFO L226 Difference]: Without dead ends: 841 [2021-05-03 14:11:40,610 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 68.7ms TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:11:40,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2021-05-03 14:11:40,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 762. [2021-05-03 14:11:40,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 761 states have (on average 3.1971090670170828) internal successors, (2433), 761 states have internal predecessors, (2433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:40,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 2433 transitions. [2021-05-03 14:11:40,617 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 2433 transitions. Word has length 19 [2021-05-03 14:11:40,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:40,617 INFO L480 AbstractCegarLoop]: Abstraction has 762 states and 2433 transitions. [2021-05-03 14:11:40,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:40,617 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 2433 transitions. [2021-05-03 14:11:40,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:11:40,618 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:40,618 INFO L551 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:40,818 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10838,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:40,818 INFO L428 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:40,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:40,819 INFO L82 PathProgramCache]: Analyzing trace with hash -589593657, now seen corresponding path program 192 times [2021-05-03 14:11:40,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:40,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899741990] [2021-05-03 14:11:40,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:40,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:40,878 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:40,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899741990] [2021-05-03 14:11:40,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355011985] [2021-05-03 14:11:40,878 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 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:40,896 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 14:11:40,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:40,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:11:40,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:40,939 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:40,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:40,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-05-03 14:11:40,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855558808] [2021-05-03 14:11:40,939 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:11:40,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:40,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:11:40,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:11:40,939 INFO L87 Difference]: Start difference. First operand 762 states and 2433 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:41,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:41,097 INFO L93 Difference]: Finished difference Result 875 states and 2625 transitions. [2021-05-03 14:11:41,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:11:41,097 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:11:41,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:41,098 INFO L225 Difference]: With dead ends: 875 [2021-05-03 14:11:41,098 INFO L226 Difference]: Without dead ends: 875 [2021-05-03 14:11:41,098 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 147.0ms TimeCoverageRelationStatistics Valid=204, Invalid=396, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:11:41,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2021-05-03 14:11:41,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 759. [2021-05-03 14:11:41,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 758 states have (on average 3.1978891820580473) internal successors, (2424), 758 states have internal predecessors, (2424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:41,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 2424 transitions. [2021-05-03 14:11:41,106 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 2424 transitions. Word has length 19 [2021-05-03 14:11:41,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:41,106 INFO L480 AbstractCegarLoop]: Abstraction has 759 states and 2424 transitions. [2021-05-03 14:11:41,106 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:41,106 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 2424 transitions. [2021-05-03 14:11:41,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:11:41,106 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:41,106 INFO L551 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:41,307 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10839,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:41,307 INFO L428 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:41,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:41,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1636634718, now seen corresponding path program 193 times [2021-05-03 14:11:41,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:41,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220926807] [2021-05-03 14:11:41,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:41,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:41,362 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 29 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:41,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220926807] [2021-05-03 14:11:41,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457204746] [2021-05-03 14:11:41,362 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 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:41,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:41,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:11:41,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:41,427 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 29 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:41,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:41,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-05-03 14:11:41,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992132832] [2021-05-03 14:11:41,427 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:11:41,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:41,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:11:41,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:11:41,428 INFO L87 Difference]: Start difference. First operand 759 states and 2424 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:41,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:41,507 INFO L93 Difference]: Finished difference Result 848 states and 2607 transitions. [2021-05-03 14:11:41,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:11:41,507 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:11:41,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:41,508 INFO L225 Difference]: With dead ends: 848 [2021-05-03 14:11:41,508 INFO L226 Difference]: Without dead ends: 834 [2021-05-03 14:11:41,508 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 68.5ms TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:11:41,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2021-05-03 14:11:41,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 759. [2021-05-03 14:11:41,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 758 states have (on average 3.1965699208443272) internal successors, (2423), 758 states have internal predecessors, (2423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:41,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 2423 transitions. [2021-05-03 14:11:41,516 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 2423 transitions. Word has length 19 [2021-05-03 14:11:41,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:41,516 INFO L480 AbstractCegarLoop]: Abstraction has 759 states and 2423 transitions. [2021-05-03 14:11:41,516 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:41,516 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 2423 transitions. [2021-05-03 14:11:41,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:11:41,517 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:41,517 INFO L551 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:41,731 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10840 [2021-05-03 14:11:41,731 INFO L428 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:41,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:41,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1226060511, now seen corresponding path program 194 times [2021-05-03 14:11:41,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:41,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670211203] [2021-05-03 14:11:41,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:41,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:41,788 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:41,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670211203] [2021-05-03 14:11:41,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067405904] [2021-05-03 14:11:41,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:41,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:11:41,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:41,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:11:41,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:41,851 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:41,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:41,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-05-03 14:11:41,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871725098] [2021-05-03 14:11:41,852 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:11:41,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:41,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:11:41,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:11:41,852 INFO L87 Difference]: Start difference. First operand 759 states and 2423 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:42,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:42,010 INFO L93 Difference]: Finished difference Result 921 states and 2738 transitions. [2021-05-03 14:11:42,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:11:42,011 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:11:42,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:42,012 INFO L225 Difference]: With dead ends: 921 [2021-05-03 14:11:42,012 INFO L226 Difference]: Without dead ends: 921 [2021-05-03 14:11:42,012 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 150.1ms TimeCoverageRelationStatistics Valid=225, Invalid=425, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:11:42,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2021-05-03 14:11:42,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 759. [2021-05-03 14:11:42,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 758 states have (on average 3.1965699208443272) internal successors, (2423), 758 states have internal predecessors, (2423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:42,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 2423 transitions. [2021-05-03 14:11:42,020 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 2423 transitions. Word has length 19 [2021-05-03 14:11:42,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:42,020 INFO L480 AbstractCegarLoop]: Abstraction has 759 states and 2423 transitions. [2021-05-03 14:11:42,020 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:42,020 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 2423 transitions. [2021-05-03 14:11:42,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:11:42,020 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:42,020 INFO L551 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:42,221 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10841,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:42,221 INFO L428 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:42,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:42,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1905381146, now seen corresponding path program 195 times [2021-05-03 14:11:42,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:42,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689950781] [2021-05-03 14:11:42,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:42,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:42,283 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 36 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:42,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689950781] [2021-05-03 14:11:42,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635586837] [2021-05-03 14:11:42,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:42,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 14:11:42,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:42,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:11:42,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:42,342 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 36 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:42,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:42,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-05-03 14:11:42,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456897023] [2021-05-03 14:11:42,343 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:11:42,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:42,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:11:42,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:11:42,343 INFO L87 Difference]: Start difference. First operand 759 states and 2423 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:42,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:42,426 INFO L93 Difference]: Finished difference Result 846 states and 2603 transitions. [2021-05-03 14:11:42,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:11:42,427 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:11:42,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:42,427 INFO L225 Difference]: With dead ends: 846 [2021-05-03 14:11:42,428 INFO L226 Difference]: Without dead ends: 830 [2021-05-03 14:11:42,428 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 64.6ms TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:11:42,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-05-03 14:11:42,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 757. [2021-05-03 14:11:42,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 757 states, 756 states have (on average 3.1997354497354498) internal successors, (2419), 756 states have internal predecessors, (2419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:42,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 757 states to 757 states and 2419 transitions. [2021-05-03 14:11:42,440 INFO L78 Accepts]: Start accepts. Automaton has 757 states and 2419 transitions. Word has length 19 [2021-05-03 14:11:42,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:42,440 INFO L480 AbstractCegarLoop]: Abstraction has 757 states and 2419 transitions. [2021-05-03 14:11:42,440 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:42,440 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states and 2419 transitions. [2021-05-03 14:11:42,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:11:42,441 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:42,441 INFO L551 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:42,656 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10842 [2021-05-03 14:11:42,656 INFO L428 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:42,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:42,656 INFO L82 PathProgramCache]: Analyzing trace with hash 518303495, now seen corresponding path program 196 times [2021-05-03 14:11:42,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:42,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738434953] [2021-05-03 14:11:42,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:42,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:42,714 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:42,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738434953] [2021-05-03 14:11:42,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233857400] [2021-05-03 14:11:42,715 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 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:42,733 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:11:42,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:42,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:11:42,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:42,775 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:42,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:42,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-05-03 14:11:42,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374176144] [2021-05-03 14:11:42,776 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:11:42,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:42,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:11:42,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:11:42,776 INFO L87 Difference]: Start difference. First operand 757 states and 2419 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:42,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:42,936 INFO L93 Difference]: Finished difference Result 1025 states and 3016 transitions. [2021-05-03 14:11:42,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:11:42,937 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:11:42,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:42,937 INFO L225 Difference]: With dead ends: 1025 [2021-05-03 14:11:42,938 INFO L226 Difference]: Without dead ends: 1025 [2021-05-03 14:11:42,938 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 147.3ms TimeCoverageRelationStatistics Valid=212, Invalid=388, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:11:42,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1025 states. [2021-05-03 14:11:42,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1025 to 769. [2021-05-03 14:11:42,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 769 states, 768 states have (on average 3.1927083333333335) internal successors, (2452), 768 states have internal predecessors, (2452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:42,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 769 states to 769 states and 2452 transitions. [2021-05-03 14:11:42,946 INFO L78 Accepts]: Start accepts. Automaton has 769 states and 2452 transitions. Word has length 19 [2021-05-03 14:11:42,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:42,946 INFO L480 AbstractCegarLoop]: Abstraction has 769 states and 2452 transitions. [2021-05-03 14:11:42,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:42,946 INFO L276 IsEmpty]: Start isEmpty. Operand 769 states and 2452 transitions. [2021-05-03 14:11:42,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:11:42,947 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:42,947 INFO L551 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:43,160 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10843 [2021-05-03 14:11:43,161 INFO L428 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:43,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:43,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1714157417, now seen corresponding path program 197 times [2021-05-03 14:11:43,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:43,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223132650] [2021-05-03 14:11:43,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:43,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:43,296 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:43,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223132650] [2021-05-03 14:11:43,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055739267] [2021-05-03 14:11:43,297 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 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:43,316 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 14:11:43,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:43,316 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 14:11:43,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:43,764 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:11:43,764 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:11:43,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:11:45,012 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:11:45,014 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:11:45,014 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:11:45,014 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-05-03 14:11:45,020 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:45,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:45,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-05-03 14:11:45,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437141002] [2021-05-03 14:11:45,020 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 14:11:45,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:45,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 14:11:45,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=636, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:11:45,021 INFO L87 Difference]: Start difference. First operand 769 states and 2452 transitions. Second operand has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:45,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:45,486 INFO L93 Difference]: Finished difference Result 853 states and 2629 transitions. [2021-05-03 14:11:45,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 14:11:45,486 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:11:45,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:45,487 INFO L225 Difference]: With dead ends: 853 [2021-05-03 14:11:45,487 INFO L226 Difference]: Without dead ends: 826 [2021-05-03 14:11:45,487 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 478.7ms TimeCoverageRelationStatistics Valid=92, Invalid=900, Unknown=0, NotChecked=0, Total=992 [2021-05-03 14:11:45,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 826 states. [2021-05-03 14:11:45,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 826 to 787. [2021-05-03 14:11:45,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 787 states, 786 states have (on average 3.1895674300254453) internal successors, (2507), 786 states have internal predecessors, (2507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:45,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 2507 transitions. [2021-05-03 14:11:45,496 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 2507 transitions. Word has length 20 [2021-05-03 14:11:45,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:45,496 INFO L480 AbstractCegarLoop]: Abstraction has 787 states and 2507 transitions. [2021-05-03 14:11:45,496 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:45,496 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 2507 transitions. [2021-05-03 14:11:45,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:11:45,497 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:45,497 INFO L551 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:45,709 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10844,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:45,709 INFO L428 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:45,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:45,709 INFO L82 PathProgramCache]: Analyzing trace with hash -122454295, now seen corresponding path program 198 times [2021-05-03 14:11:45,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:45,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118123534] [2021-05-03 14:11:45,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:45,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:45,852 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:45,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118123534] [2021-05-03 14:11:45,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928303818] [2021-05-03 14:11:45,852 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 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:11:45,875 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:11:45,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:45,876 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 14:11:45,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:46,346 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:11:46,347 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:11:46,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:11:47,829 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:11:47,853 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:11:47,860 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:11:47,861 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-05-03 14:11:47,935 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:47,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:47,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-05-03 14:11:47,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188636931] [2021-05-03 14:11:47,936 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-03 14:11:47,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:47,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-03 14:11:47,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:11:47,936 INFO L87 Difference]: Start difference. First operand 787 states and 2507 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:48,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:48,455 INFO L93 Difference]: Finished difference Result 877 states and 2701 transitions. [2021-05-03 14:11:48,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:11:48,456 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:11:48,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:48,457 INFO L225 Difference]: With dead ends: 877 [2021-05-03 14:11:48,457 INFO L226 Difference]: Without dead ends: 861 [2021-05-03 14:11:48,458 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 443.6ms TimeCoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:11:48,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2021-05-03 14:11:48,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 806. [2021-05-03 14:11:48,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 805 states have (on average 3.1962732919254657) internal successors, (2573), 805 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:48,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 2573 transitions. [2021-05-03 14:11:48,466 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 2573 transitions. Word has length 20 [2021-05-03 14:11:48,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:48,467 INFO L480 AbstractCegarLoop]: Abstraction has 806 states and 2573 transitions. [2021-05-03 14:11:48,467 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:48,467 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 2573 transitions. [2021-05-03 14:11:48,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:11:48,468 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:48,468 INFO L551 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:48,689 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11223 [2021-05-03 14:11:48,689 INFO L428 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:48,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:48,689 INFO L82 PathProgramCache]: Analyzing trace with hash 736420235, now seen corresponding path program 199 times [2021-05-03 14:11:48,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:48,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356371444] [2021-05-03 14:11:48,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:48,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:48,810 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:48,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356371444] [2021-05-03 14:11:48,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485903635] [2021-05-03 14:11:48,810 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 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:48,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:48,832 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 14:11:48,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:49,407 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 2028 DAG size of output: 48 [2021-05-03 14:11:49,574 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:11:49,574 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:11:49,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:11:50,536 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:11:51,118 WARN L205 SmtUtils]: Spent 528.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-05-03 14:11:51,118 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-05-03 14:11:51,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-05-03 14:11:52,683 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:11:53,129 WARN L205 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-05-03 14:11:53,130 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-05-03 14:11:53,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-05-03 14:11:54,910 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-05-03 14:11:55,223 WARN L205 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:11:55,224 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:11:55,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:11:56,259 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-05-03 14:11:56,284 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-05-03 14:11:56,285 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:11:56,285 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-05-03 14:11:56,322 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:56,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:56,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-05-03 14:11:56,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487178217] [2021-05-03 14:11:56,323 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-03 14:11:56,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:56,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-03 14:11:56,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:11:56,323 INFO L87 Difference]: Start difference. First operand 806 states and 2573 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:56,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:56,745 INFO L93 Difference]: Finished difference Result 901 states and 2754 transitions. [2021-05-03 14:11:56,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 14:11:56,745 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:11:56,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:56,747 INFO L225 Difference]: With dead ends: 901 [2021-05-03 14:11:56,747 INFO L226 Difference]: Without dead ends: 891 [2021-05-03 14:11:56,747 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 409.6ms TimeCoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:11:56,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2021-05-03 14:11:56,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 806. [2021-05-03 14:11:56,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 805 states have (on average 3.1962732919254657) internal successors, (2573), 805 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:56,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 2573 transitions. [2021-05-03 14:11:56,756 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 2573 transitions. Word has length 20 [2021-05-03 14:11:56,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:56,756 INFO L480 AbstractCegarLoop]: Abstraction has 806 states and 2573 transitions. [2021-05-03 14:11:56,756 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:56,756 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 2573 transitions. [2021-05-03 14:11:56,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:11:56,758 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:56,758 INFO L551 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:56,973 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11644,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:56,973 INFO L428 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:56,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:56,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1564059463, now seen corresponding path program 200 times [2021-05-03 14:11:56,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:56,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709509893] [2021-05-03 14:11:56,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:56,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:57,105 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:57,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709509893] [2021-05-03 14:11:57,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358956886] [2021-05-03 14:11:57,106 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 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:11:57,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:11:57,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:57,131 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 14:11:57,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:57,566 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:11:57,567 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:11:57,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:11:58,115 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:11:58,117 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:11:58,117 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:11:58,117 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-05-03 14:11:58,123 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:58,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:58,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-05-03 14:11:58,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202893837] [2021-05-03 14:11:58,123 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-03 14:11:58,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:58,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-03 14:11:58,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:11:58,124 INFO L87 Difference]: Start difference. First operand 806 states and 2573 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:58,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:58,669 INFO L93 Difference]: Finished difference Result 938 states and 2953 transitions. [2021-05-03 14:11:58,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:11:58,670 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:11:58,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:58,671 INFO L225 Difference]: With dead ends: 938 [2021-05-03 14:11:58,671 INFO L226 Difference]: Without dead ends: 922 [2021-05-03 14:11:58,671 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 420.2ms TimeCoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:11:58,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 922 states. [2021-05-03 14:11:58,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 922 to 871. [2021-05-03 14:11:58,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 870 states have (on average 3.2367816091954023) internal successors, (2816), 870 states have internal predecessors, (2816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:58,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 2816 transitions. [2021-05-03 14:11:58,681 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 2816 transitions. Word has length 20 [2021-05-03 14:11:58,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:58,681 INFO L480 AbstractCegarLoop]: Abstraction has 871 states and 2816 transitions. [2021-05-03 14:11:58,681 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:58,681 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 2816 transitions. [2021-05-03 14:11:58,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:11:58,682 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:58,682 INFO L551 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:58,882 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13290 [2021-05-03 14:11:58,882 INFO L428 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:58,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:58,883 INFO L82 PathProgramCache]: Analyzing trace with hash -705184933, now seen corresponding path program 201 times [2021-05-03 14:11:58,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:58,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945390201] [2021-05-03 14:11:58,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:58,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:58,994 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:58,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945390201] [2021-05-03 14:11:58,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612718681] [2021-05-03 14:11:58,995 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 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:59,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 14:11:59,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:59,015 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 14:11:59,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:59,426 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:11:59,426 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:11:59,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:12:00,738 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:12:01,269 WARN L205 SmtUtils]: Spent 481.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-05-03 14:12:01,270 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-05-03 14:12:01,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-05-03 14:12:04,149 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 1130 DAG size of output: 587 [2021-05-03 14:12:04,296 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 1195 DAG size of output: 638 [2021-05-03 14:12:04,454 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 1195 DAG size of output: 638 [2021-05-03 14:12:04,603 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 1201 DAG size of output: 610 [2021-05-03 14:12:04,897 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 567 DAG size of output: 603 [2021-05-03 14:12:07,548 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 1035 DAG size of output: 653 [2021-05-03 14:12:08,034 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:12:08,493 WARN L205 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-05-03 14:12:08,494 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-05-03 14:12:08,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-05-03 14:12:11,335 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 1555 DAG size of output: 903 [2021-05-03 14:12:11,552 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 1561 DAG size of output: 902 [2021-05-03 14:12:11,685 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 904 DAG size of output: 1061 [2021-05-03 14:12:11,799 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 799 DAG size of output: 923 [2021-05-03 14:12:14,688 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 1636 DAG size of output: 971 [2021-05-03 14:12:14,807 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 1636 DAG size of output: 971 [2021-05-03 14:12:14,938 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 1642 DAG size of output: 980 [2021-05-03 14:12:15,423 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-05-03 14:12:15,734 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:12:15,735 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:12:15,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:12:16,142 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-05-03 14:12:16,165 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-05-03 14:12:16,165 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:12:16,166 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-05-03 14:12:16,202 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:12:16,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:12:16,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-05-03 14:12:16,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648570602] [2021-05-03 14:12:16,203 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-03 14:12:16,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:12:16,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-03 14:12:16,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:12:16,203 INFO L87 Difference]: Start difference. First operand 871 states and 2816 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:16,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:12:16,818 INFO L93 Difference]: Finished difference Result 978 states and 3027 transitions. [2021-05-03 14:12:16,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 14:12:16,819 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:12:16,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:12:16,820 INFO L225 Difference]: With dead ends: 978 [2021-05-03 14:12:16,820 INFO L226 Difference]: Without dead ends: 959 [2021-05-03 14:12:16,820 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 465.0ms TimeCoverageRelationStatistics Valid=123, Invalid=869, Unknown=0, NotChecked=0, Total=992 [2021-05-03 14:12:16,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2021-05-03 14:12:16,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 869. [2021-05-03 14:12:16,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 868 states have (on average 3.224654377880184) internal successors, (2799), 868 states have internal predecessors, (2799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:16,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 2799 transitions. [2021-05-03 14:12:16,830 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 2799 transitions. Word has length 20 [2021-05-03 14:12:16,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:12:16,830 INFO L480 AbstractCegarLoop]: Abstraction has 869 states and 2799 transitions. [2021-05-03 14:12:16,830 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:16,830 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 2799 transitions. [2021-05-03 14:12:16,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:12:16,831 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:12:16,831 INFO L551 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:12:17,032 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13517,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:12:17,032 INFO L428 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:12:17,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:12:17,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1005428375, now seen corresponding path program 202 times [2021-05-03 14:12:17,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:12:17,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031025547] [2021-05-03 14:12:17,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:12:17,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:12:17,162 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:12:17,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031025547] [2021-05-03 14:12:17,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339498651] [2021-05-03 14:12:17,162 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 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:12:17,186 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:12:17,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:12:17,186 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 14:12:17,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:12:17,674 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:12:17,674 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:12:17,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:12:19,096 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:12:19,709 WARN L205 SmtUtils]: Spent 561.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-05-03 14:12:19,709 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-05-03 14:12:19,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-05-03 14:12:24,721 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 1231 DAG size of output: 906 [2021-05-03 14:12:24,932 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 1973 DAG size of output: 1412 [2021-05-03 14:12:25,182 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 1973 DAG size of output: 1412 [2021-05-03 14:12:25,417 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 1979 DAG size of output: 1276 [2021-05-03 14:12:25,536 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 1278 DAG size of output: 900 [2021-05-03 14:12:26,484 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:12:26,927 WARN L205 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-05-03 14:12:26,927 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-05-03 14:12:26,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-05-03 14:12:27,815 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-05-03 14:12:28,128 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:12:28,129 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:12:28,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:12:28,494 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-05-03 14:12:28,517 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-05-03 14:12:28,517 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:12:28,518 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-05-03 14:12:28,556 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:12:28,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:12:28,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-05-03 14:12:28,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103465139] [2021-05-03 14:12:28,556 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-03 14:12:28,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:12:28,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-03 14:12:28,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:12:28,557 INFO L87 Difference]: Start difference. First operand 869 states and 2799 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:29,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:12:29,295 INFO L93 Difference]: Finished difference Result 942 states and 2954 transitions. [2021-05-03 14:12:29,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 14:12:29,295 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:12:29,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:12:29,297 INFO L225 Difference]: With dead ends: 942 [2021-05-03 14:12:29,297 INFO L226 Difference]: Without dead ends: 932 [2021-05-03 14:12:29,297 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 519.2ms TimeCoverageRelationStatistics Valid=115, Invalid=941, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 14:12:29,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 932 states. [2021-05-03 14:12:29,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 932 to 872. [2021-05-03 14:12:29,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 871 states have (on average 3.2238805970149254) internal successors, (2808), 871 states have internal predecessors, (2808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:29,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 2808 transitions. [2021-05-03 14:12:29,307 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 2808 transitions. Word has length 20 [2021-05-03 14:12:29,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:12:29,307 INFO L480 AbstractCegarLoop]: Abstraction has 872 states and 2808 transitions. [2021-05-03 14:12:29,307 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:29,307 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 2808 transitions. [2021-05-03 14:12:29,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:12:29,308 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:12:29,308 INFO L551 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:12:29,523 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16879 [2021-05-03 14:12:29,523 INFO L428 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:12:29,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:12:29,523 INFO L82 PathProgramCache]: Analyzing trace with hash 990820585, now seen corresponding path program 203 times [2021-05-03 14:12:29,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:12:29,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009016702] [2021-05-03 14:12:29,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:12:29,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:12:29,649 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:12:29,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009016702] [2021-05-03 14:12:29,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188149552] [2021-05-03 14:12:29,650 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 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:12:29,673 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 14:12:29,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:12:29,674 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 14:12:29,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:12:30,423 WARN L205 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 3527 DAG size of output: 48 [2021-05-03 14:12:30,550 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:12:30,550 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:12:30,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:12:33,087 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:12:33,088 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:12:33,089 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:12:33,089 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-05-03 14:12:33,094 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:12:33,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:12:33,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-05-03 14:12:33,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462762949] [2021-05-03 14:12:33,095 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-03 14:12:33,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:12:33,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-03 14:12:33,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:12:33,095 INFO L87 Difference]: Start difference. First operand 872 states and 2808 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:33,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:12:33,731 INFO L93 Difference]: Finished difference Result 1010 states and 3206 transitions. [2021-05-03 14:12:33,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:12:33,731 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:12:33,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:12:33,733 INFO L225 Difference]: With dead ends: 1010 [2021-05-03 14:12:33,733 INFO L226 Difference]: Without dead ends: 994 [2021-05-03 14:12:33,733 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 433.5ms TimeCoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:12:33,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 994 states. [2021-05-03 14:12:33,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 994 to 941. [2021-05-03 14:12:33,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 941 states, 940 states have (on average 3.2542553191489363) internal successors, (3059), 940 states have internal predecessors, (3059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:33,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 941 states to 941 states and 3059 transitions. [2021-05-03 14:12:33,744 INFO L78 Accepts]: Start accepts. Automaton has 941 states and 3059 transitions. Word has length 20 [2021-05-03 14:12:33,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:12:33,744 INFO L480 AbstractCegarLoop]: Abstraction has 941 states and 3059 transitions. [2021-05-03 14:12:33,744 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:33,744 INFO L276 IsEmpty]: Start isEmpty. Operand 941 states and 3059 transitions. [2021-05-03 14:12:33,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:12:33,745 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:12:33,745 INFO L551 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:12:33,957 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20316,217 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:12:33,957 INFO L428 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:12:33,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:12:33,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1849695115, now seen corresponding path program 204 times [2021-05-03 14:12:33,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:12:33,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434139610] [2021-05-03 14:12:33,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:12:33,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:12:34,084 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:12:34,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434139610] [2021-05-03 14:12:34,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744542858] [2021-05-03 14:12:34,085 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 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:12:34,108 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:12:34,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:12:34,109 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 14:12:34,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:12:34,540 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:12:34,541 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:12:34,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:12:35,072 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:12:35,899 WARN L205 SmtUtils]: Spent 775.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-05-03 14:12:35,900 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-05-03 14:12:35,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-05-03 14:12:38,862 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:12:39,279 WARN L205 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-05-03 14:12:39,279 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-05-03 14:12:39,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-05-03 14:12:40,015 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-05-03 14:12:40,293 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:12:40,293 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:12:40,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:12:40,744 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-05-03 14:12:40,767 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-05-03 14:12:40,767 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:12:40,768 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-05-03 14:12:40,801 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:12:40,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:12:40,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-05-03 14:12:40,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677031501] [2021-05-03 14:12:40,801 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-03 14:12:40,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:12:40,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-03 14:12:40,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:12:40,802 INFO L87 Difference]: Start difference. First operand 941 states and 3059 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:41,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:12:41,635 INFO L93 Difference]: Finished difference Result 1081 states and 3355 transitions. [2021-05-03 14:12:41,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-03 14:12:41,636 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:12:41,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:12:41,637 INFO L225 Difference]: With dead ends: 1081 [2021-05-03 14:12:41,637 INFO L226 Difference]: Without dead ends: 1055 [2021-05-03 14:12:41,637 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 570.8ms TimeCoverageRelationStatistics Valid=153, Invalid=1037, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 14:12:41,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1055 states. [2021-05-03 14:12:41,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1055 to 947. [2021-05-03 14:12:41,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 947 states, 946 states have (on average 3.251585623678647) internal successors, (3076), 946 states have internal predecessors, (3076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:41,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 947 states to 947 states and 3076 transitions. [2021-05-03 14:12:41,648 INFO L78 Accepts]: Start accepts. Automaton has 947 states and 3076 transitions. Word has length 20 [2021-05-03 14:12:41,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:12:41,648 INFO L480 AbstractCegarLoop]: Abstraction has 947 states and 3076 transitions. [2021-05-03 14:12:41,648 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:41,648 INFO L276 IsEmpty]: Start isEmpty. Operand 947 states and 3076 transitions. [2021-05-03 14:12:41,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:12:41,649 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:12:41,649 INFO L551 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:12:41,849 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20971 [2021-05-03 14:12:41,849 INFO L428 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:12:41,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:12:41,850 INFO L82 PathProgramCache]: Analyzing trace with hash -734658873, now seen corresponding path program 205 times [2021-05-03 14:12:41,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:12:41,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393148038] [2021-05-03 14:12:41,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:12:41,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:12:41,981 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:12:41,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393148038] [2021-05-03 14:12:41,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385226858] [2021-05-03 14:12:41,981 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 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:12:42,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:12:42,007 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 14:12:42,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:12:42,557 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:12:42,557 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:12:42,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:12:43,243 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:12:43,832 WARN L205 SmtUtils]: Spent 530.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-05-03 14:12:43,833 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-05-03 14:12:43,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-05-03 14:12:46,157 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 969 DAG size of output: 782 [2021-05-03 14:12:46,265 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 1134 DAG size of output: 900 [2021-05-03 14:12:48,361 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 1224 DAG size of output: 1019 [2021-05-03 14:12:48,618 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 1998 DAG size of output: 1651 [2021-05-03 14:12:52,976 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 1903 DAG size of output: 1478 [2021-05-03 14:12:53,436 WARN L205 SmtUtils]: Spent 449.00 ms on a formula simplification. DAG size of input: 3366 DAG size of output: 2713 [2021-05-03 14:12:53,877 WARN L205 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 3366 DAG size of output: 2713 [2021-05-03 14:12:54,410 WARN L205 SmtUtils]: Spent 522.00 ms on a formula simplification. DAG size of input: 3375 DAG size of output: 2398 [2021-05-03 14:12:54,982 WARN L205 SmtUtils]: Spent 557.00 ms on a formula simplification. DAG size of input: 2400 DAG size of output: 2870 [2021-05-03 14:12:55,316 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 1347 DAG size of output: 1704 [2021-05-03 14:12:55,449 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 976 DAG size of output: 846 [2021-05-03 14:12:57,735 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 1987 DAG size of output: 873 [2021-05-03 14:12:58,128 WARN L205 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 3530 DAG size of output: 1944 [2021-05-03 14:12:58,505 WARN L205 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 3530 DAG size of output: 1944 [2021-05-03 14:12:58,910 WARN L205 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 3532 DAG size of output: 1914 [2021-05-03 14:12:59,178 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 1914 DAG size of output: 1745 [2021-05-03 14:13:00,850 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 1038 DAG size of output: 1365 [2021-05-03 14:13:02,264 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 791 DAG size of output: 1106 [2021-05-03 14:13:03,683 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 2079 DAG size of output: 1108 [2021-05-03 14:13:03,852 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 2079 DAG size of output: 1108 [2021-05-03 14:13:03,981 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 2082 DAG size of output: 746 [2021-05-03 14:13:04,095 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 748 DAG size of output: 915 [2021-05-03 14:13:04,706 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:13:05,159 WARN L205 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-05-03 14:13:05,159 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-05-03 14:13:05,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-05-03 14:13:08,082 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 1315 DAG size of output: 918 [2021-05-03 14:13:10,805 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 1710 DAG size of output: 1379 [2021-05-03 14:13:11,069 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 2654 DAG size of output: 1937 [2021-05-03 14:13:11,346 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 2654 DAG size of output: 1937 [2021-05-03 14:13:11,650 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 2659 DAG size of output: 1746 [2021-05-03 14:13:11,896 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 1748 DAG size of output: 1669 [2021-05-03 14:13:12,078 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 1487 DAG size of output: 1549 [2021-05-03 14:13:12,285 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 1419 DAG size of output: 1670 [2021-05-03 14:13:12,425 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 1375 DAG size of output: 1368 [2021-05-03 14:13:14,265 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-05-03 14:13:14,573 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:13:14,574 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:13:14,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:13:18,562 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-05-03 14:13:18,585 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-05-03 14:13:18,586 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:13:18,586 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-05-03 14:13:18,622 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:13:18,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:13:18,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-05-03 14:13:18,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857194105] [2021-05-03 14:13:18,623 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-03 14:13:18,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:13:18,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-03 14:13:18,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:13:18,623 INFO L87 Difference]: Start difference. First operand 947 states and 3076 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:19,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:13:19,186 INFO L93 Difference]: Finished difference Result 1018 states and 3228 transitions. [2021-05-03 14:13:19,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 14:13:19,186 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:13:19,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:13:19,187 INFO L225 Difference]: With dead ends: 1018 [2021-05-03 14:13:19,188 INFO L226 Difference]: Without dead ends: 1008 [2021-05-03 14:13:19,188 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 582.0ms TimeCoverageRelationStatistics Valid=129, Invalid=1061, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 14:13:19,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1008 states. [2021-05-03 14:13:19,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1008 to 951. [2021-05-03 14:13:19,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 951 states, 950 states have (on average 3.2505263157894735) internal successors, (3088), 950 states have internal predecessors, (3088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:19,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 951 states to 951 states and 3088 transitions. [2021-05-03 14:13:19,221 INFO L78 Accepts]: Start accepts. Automaton has 951 states and 3088 transitions. Word has length 20 [2021-05-03 14:13:19,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:13:19,221 INFO L480 AbstractCegarLoop]: Abstraction has 951 states and 3088 transitions. [2021-05-03 14:13:19,221 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:19,221 INFO L276 IsEmpty]: Start isEmpty. Operand 951 states and 3088 transitions. [2021-05-03 14:13:19,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:13:19,222 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:13:19,222 INFO L551 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:13:19,423 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22418 [2021-05-03 14:13:19,423 INFO L428 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:13:19,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:13:19,424 INFO L82 PathProgramCache]: Analyzing trace with hash 754746123, now seen corresponding path program 206 times [2021-05-03 14:13:19,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:13:19,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173826968] [2021-05-03 14:13:19,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:13:19,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:13:19,552 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:13:19,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173826968] [2021-05-03 14:13:19,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997681036] [2021-05-03 14:13:19,553 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 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:13:19,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:13:19,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:13:19,574 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 14:13:19,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:13:20,046 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:13:20,046 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:13:20,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:13:20,324 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:13:20,911 WARN L205 SmtUtils]: Spent 531.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-05-03 14:13:20,912 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-05-03 14:13:20,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-05-03 14:13:23,376 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:13:23,813 WARN L205 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-05-03 14:13:23,814 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-05-03 14:13:23,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-05-03 14:13:25,946 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 1113 DAG size of output: 775 [2021-05-03 14:13:26,157 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 1118 DAG size of output: 579 [2021-05-03 14:13:26,280 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 581 DAG size of output: 729 [2021-05-03 14:13:27,657 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-05-03 14:13:27,962 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:13:27,963 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:13:27,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:13:28,995 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-05-03 14:13:29,017 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-05-03 14:13:29,018 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:13:29,018 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-05-03 14:13:29,054 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:13:29,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:13:29,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-05-03 14:13:29,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992739492] [2021-05-03 14:13:29,054 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-03 14:13:29,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:13:29,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-03 14:13:29,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:13:29,055 INFO L87 Difference]: Start difference. First operand 951 states and 3088 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:29,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:13:29,702 INFO L93 Difference]: Finished difference Result 1044 states and 3286 transitions. [2021-05-03 14:13:29,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 14:13:29,703 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:13:29,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:13:29,704 INFO L225 Difference]: With dead ends: 1044 [2021-05-03 14:13:29,704 INFO L226 Difference]: Without dead ends: 1034 [2021-05-03 14:13:29,704 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 642.1ms TimeCoverageRelationStatistics Valid=135, Invalid=1055, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 14:13:29,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1034 states. [2021-05-03 14:13:29,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1034 to 951. [2021-05-03 14:13:29,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 951 states, 950 states have (on average 3.2505263157894735) internal successors, (3088), 950 states have internal predecessors, (3088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:29,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 951 states to 951 states and 3088 transitions. [2021-05-03 14:13:29,716 INFO L78 Accepts]: Start accepts. Automaton has 951 states and 3088 transitions. Word has length 20 [2021-05-03 14:13:29,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:13:29,716 INFO L480 AbstractCegarLoop]: Abstraction has 951 states and 3088 transitions. [2021-05-03 14:13:29,716 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:29,716 INFO L276 IsEmpty]: Start isEmpty. Operand 951 states and 3088 transitions. [2021-05-03 14:13:29,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:13:29,717 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:13:29,717 INFO L551 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:13:29,918 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30234 [2021-05-03 14:13:29,918 INFO L428 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:13:29,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:13:29,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1412276551, now seen corresponding path program 207 times [2021-05-03 14:13:29,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:13:29,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572189852] [2021-05-03 14:13:29,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:13:29,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:13:30,036 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:13:30,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572189852] [2021-05-03 14:13:30,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761842593] [2021-05-03 14:13:30,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:13:30,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 14:13:30,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:13:30,058 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 14:13:30,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:13:30,463 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:13:30,464 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:13:30,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:13:32,711 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:13:32,712 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:13:32,712 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:13:32,712 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-05-03 14:13:32,718 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:13:32,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:13:32,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-05-03 14:13:32,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651020745] [2021-05-03 14:13:32,719 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-03 14:13:32,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:13:32,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-03 14:13:32,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:13:32,719 INFO L87 Difference]: Start difference. First operand 951 states and 3088 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:33,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:13:33,355 INFO L93 Difference]: Finished difference Result 1074 states and 3428 transitions. [2021-05-03 14:13:33,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:13:33,355 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:13:33,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:13:33,357 INFO L225 Difference]: With dead ends: 1074 [2021-05-03 14:13:33,357 INFO L226 Difference]: Without dead ends: 1058 [2021-05-03 14:13:33,357 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 386.4ms TimeCoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:13:33,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1058 states. [2021-05-03 14:13:33,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1058 to 1006. [2021-05-03 14:13:33,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1006 states, 1005 states have (on average 3.261691542288557) internal successors, (3278), 1005 states have internal predecessors, (3278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:33,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1006 states to 1006 states and 3278 transitions. [2021-05-03 14:13:33,367 INFO L78 Accepts]: Start accepts. Automaton has 1006 states and 3278 transitions. Word has length 20 [2021-05-03 14:13:33,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:13:33,367 INFO L480 AbstractCegarLoop]: Abstraction has 1006 states and 3278 transitions. [2021-05-03 14:13:33,367 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:33,367 INFO L276 IsEmpty]: Start isEmpty. Operand 1006 states and 3278 transitions. [2021-05-03 14:13:33,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:13:33,368 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:13:33,368 INFO L551 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:13:33,569 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32108,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:13:33,570 INFO L428 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:13:33,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:13:33,570 INFO L82 PathProgramCache]: Analyzing trace with hash -553402021, now seen corresponding path program 208 times [2021-05-03 14:13:33,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:13:33,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116408952] [2021-05-03 14:13:33,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:13:33,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:13:33,688 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:13:33,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116408952] [2021-05-03 14:13:33,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012828182] [2021-05-03 14:13:33,689 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 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:13:33,707 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:13:33,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:13:33,708 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 14:13:33,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:13:34,120 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:13:34,121 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:13:34,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:13:35,170 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:13:35,746 WARN L205 SmtUtils]: Spent 525.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-05-03 14:13:35,747 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-05-03 14:13:35,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-05-03 14:13:37,219 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:13:37,668 WARN L205 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-05-03 14:13:37,668 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-05-03 14:13:37,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-05-03 14:13:39,361 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-05-03 14:13:39,677 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:13:39,678 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:13:39,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:13:40,326 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-05-03 14:13:40,349 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-05-03 14:13:40,350 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:13:40,350 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-05-03 14:13:40,389 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:13:40,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:13:40,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-05-03 14:13:40,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751416377] [2021-05-03 14:13:40,389 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-03 14:13:40,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:13:40,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-03 14:13:40,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:13:40,390 INFO L87 Difference]: Start difference. First operand 1006 states and 3278 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:41,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:13:41,389 INFO L93 Difference]: Finished difference Result 1179 states and 3670 transitions. [2021-05-03 14:13:41,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-03 14:13:41,389 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:13:41,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:13:41,391 INFO L225 Difference]: With dead ends: 1179 [2021-05-03 14:13:41,391 INFO L226 Difference]: Without dead ends: 1153 [2021-05-03 14:13:41,391 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 630.3ms TimeCoverageRelationStatistics Valid=182, Invalid=1300, Unknown=0, NotChecked=0, Total=1482 [2021-05-03 14:13:41,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1153 states. [2021-05-03 14:13:41,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1153 to 1019. [2021-05-03 14:13:41,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1019 states, 1018 states have (on average 3.2652259332023577) internal successors, (3324), 1018 states have internal predecessors, (3324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:41,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1019 states to 1019 states and 3324 transitions. [2021-05-03 14:13:41,402 INFO L78 Accepts]: Start accepts. Automaton has 1019 states and 3324 transitions. Word has length 20 [2021-05-03 14:13:41,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:13:41,402 INFO L480 AbstractCegarLoop]: Abstraction has 1019 states and 3324 transitions. [2021-05-03 14:13:41,402 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:41,402 INFO L276 IsEmpty]: Start isEmpty. Operand 1019 states and 3324 transitions. [2021-05-03 14:13:41,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:13:41,403 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:13:41,403 INFO L551 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:13:41,604 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32846,222 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:13:41,604 INFO L428 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:13:41,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:13:41,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1157211287, now seen corresponding path program 209 times [2021-05-03 14:13:41,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:13:41,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51246686] [2021-05-03 14:13:41,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:13:41,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:13:41,732 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:13:41,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51246686] [2021-05-03 14:13:41,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850169226] [2021-05-03 14:13:41,733 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 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:13:41,772 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 14:13:41,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:13:41,775 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 14:13:41,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:13:42,248 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:13:42,249 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:13:42,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:13:43,455 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:13:44,059 WARN L205 SmtUtils]: Spent 535.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-05-03 14:13:44,060 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-05-03 14:13:44,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-05-03 14:13:47,578 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:13:48,016 WARN L205 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-05-03 14:13:48,016 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-05-03 14:13:48,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-05-03 14:13:50,646 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-05-03 14:13:50,955 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:13:50,955 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:13:50,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:13:52,548 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-05-03 14:13:52,571 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-05-03 14:13:52,572 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:13:52,572 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-05-03 14:13:52,610 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:13:52,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:13:52,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-05-03 14:13:52,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655017373] [2021-05-03 14:13:52,611 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-03 14:13:52,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:13:52,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-03 14:13:52,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:13:52,611 INFO L87 Difference]: Start difference. First operand 1019 states and 3324 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:53,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:13:53,340 INFO L93 Difference]: Finished difference Result 1092 states and 3484 transitions. [2021-05-03 14:13:53,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 14:13:53,341 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:13:53,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:13:53,342 INFO L225 Difference]: With dead ends: 1092 [2021-05-03 14:13:53,342 INFO L226 Difference]: Without dead ends: 1082 [2021-05-03 14:13:53,343 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 599.3ms TimeCoverageRelationStatistics Valid=130, Invalid=1130, Unknown=0, NotChecked=0, Total=1260 [2021-05-03 14:13:53,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2021-05-03 14:13:53,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 1022. [2021-05-03 14:13:53,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1022 states, 1021 states have (on average 3.2644466209598435) internal successors, (3333), 1021 states have internal predecessors, (3333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:53,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1022 states to 1022 states and 3333 transitions. [2021-05-03 14:13:53,355 INFO L78 Accepts]: Start accepts. Automaton has 1022 states and 3333 transitions. Word has length 20 [2021-05-03 14:13:53,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:13:53,355 INFO L480 AbstractCegarLoop]: Abstraction has 1022 states and 3333 transitions. [2021-05-03 14:13:53,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:53,355 INFO L276 IsEmpty]: Start isEmpty. Operand 1022 states and 3333 transitions. [2021-05-03 14:13:53,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:13:53,356 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:13:53,356 INFO L551 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:13:53,571 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34328,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:13:53,571 INFO L428 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:13:53,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:13:53,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1648351013, now seen corresponding path program 210 times [2021-05-03 14:13:53,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:13:53,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119589860] [2021-05-03 14:13:53,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:13:53,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:13:53,702 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:13:53,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119589860] [2021-05-03 14:13:53,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214247286] [2021-05-03 14:13:53,703 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 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:13:53,724 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 14:13:53,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:13:53,725 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 14:13:53,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:13:54,188 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:13:54,188 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:13:54,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:13:54,611 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:13:55,230 WARN L205 SmtUtils]: Spent 546.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-05-03 14:13:55,230 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-05-03 14:13:55,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-05-03 14:13:58,685 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:13:59,127 WARN L205 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-05-03 14:13:59,127 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-05-03 14:13:59,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-05-03 14:14:00,220 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-05-03 14:14:00,541 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:14:00,541 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:14:00,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:14:01,362 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-05-03 14:14:01,385 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-05-03 14:14:01,386 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:14:01,386 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-05-03 14:14:01,423 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:14:01,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:14:01,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-05-03 14:14:01,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969702476] [2021-05-03 14:14:01,424 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-03 14:14:01,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:14:01,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-03 14:14:01,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:14:01,424 INFO L87 Difference]: Start difference. First operand 1022 states and 3333 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:14:02,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:14:02,061 INFO L93 Difference]: Finished difference Result 1112 states and 3526 transitions. [2021-05-03 14:14:02,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 14:14:02,062 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:14:02,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:14:02,064 INFO L225 Difference]: With dead ends: 1112 [2021-05-03 14:14:02,064 INFO L226 Difference]: Without dead ends: 1102 [2021-05-03 14:14:02,064 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 650.7ms TimeCoverageRelationStatistics Valid=153, Invalid=1179, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 14:14:02,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1102 states. [2021-05-03 14:14:02,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1102 to 1022. [2021-05-03 14:14:02,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1022 states, 1021 states have (on average 3.2644466209598435) internal successors, (3333), 1021 states have internal predecessors, (3333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:14:02,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1022 states to 1022 states and 3333 transitions. [2021-05-03 14:14:02,075 INFO L78 Accepts]: Start accepts. Automaton has 1022 states and 3333 transitions. Word has length 20 [2021-05-03 14:14:02,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:14:02,075 INFO L480 AbstractCegarLoop]: Abstraction has 1022 states and 3333 transitions. [2021-05-03 14:14:02,075 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:14:02,075 INFO L276 IsEmpty]: Start isEmpty. Operand 1022 states and 3333 transitions. [2021-05-03 14:14:02,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:14:02,076 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:14:02,076 INFO L551 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:14:02,292 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36861 [2021-05-03 14:14:02,292 INFO L428 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:14:02,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:14:02,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1573530903, now seen corresponding path program 211 times [2021-05-03 14:14:02,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:14:02,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247314286] [2021-05-03 14:14:02,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:14:02,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:14:02,415 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:14:02,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247314286] [2021-05-03 14:14:02,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20067964] [2021-05-03 14:14:02,416 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:14:02,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:14:02,436 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 14:14:02,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:14:02,927 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:14:02,928 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:14:02,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:14:05,272 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:14:05,869 WARN L205 SmtUtils]: Spent 541.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-05-03 14:14:05,870 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-05-03 14:14:05,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-05-03 14:14:07,150 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 805 DAG size of output: 883 [2021-05-03 14:14:08,669 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 1173 DAG size of output: 1010 [2021-05-03 14:14:09,875 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 1498 DAG size of output: 1320 [2021-05-03 14:14:11,542 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 1883 DAG size of output: 1458 [2021-05-03 14:14:13,398 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 1537 DAG size of output: 1315 [2021-05-03 14:14:14,905 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 2016 DAG size of output: 1756 [2021-05-03 14:14:16,456 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 1275 DAG size of output: 1035 [2021-05-03 14:14:17,724 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 1240 DAG size of output: 1025 [2021-05-03 14:14:17,941 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 1954 DAG size of output: 1569 [2021-05-03 14:14:20,218 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 1283 DAG size of output: 995 [2021-05-03 14:14:20,528 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 2707 DAG size of output: 1972 [2021-05-03 14:14:20,956 WARN L205 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 4119 DAG size of output: 2394 [2021-05-03 14:14:21,695 WARN L205 SmtUtils]: Spent 722.00 ms on a formula simplification. DAG size of input: 4924 DAG size of output: 3189 [2021-05-03 14:14:24,147 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 1500 DAG size of output: 1011 [2021-05-03 14:14:25,888 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 1399 DAG size of output: 1084 [2021-05-03 14:14:27,405 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 1301 DAG size of output: 1067 [2021-05-03 14:14:27,557 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 1580 DAG size of output: 1252 [2021-05-03 14:14:27,860 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 2166 DAG size of output: 1660 [2021-05-03 14:14:28,259 WARN L205 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 2901 DAG size of output: 1954 [2021-05-03 14:14:29,707 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 1160 DAG size of output: 1072 [2021-05-03 14:14:31,187 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 1497 DAG size of output: 1405 [2021-05-03 14:14:31,604 WARN L205 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 3877 DAG size of output: 1995 [2021-05-03 14:14:33,505 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 1465 DAG size of output: 1199 [2021-05-03 14:14:35,095 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 1485 DAG size of output: 1238 [2021-05-03 14:14:35,394 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 2321 DAG size of output: 1911 [2021-05-03 14:14:38,196 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 1642 DAG size of output: 1247 [2021-05-03 14:14:38,626 WARN L205 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 3250 DAG size of output: 2454 [2021-05-03 14:14:40,329 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 1115 DAG size of output: 1084 [2021-05-03 14:14:41,976 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 1672 DAG size of output: 1539 [2021-05-03 14:14:42,277 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 1865 DAG size of output: 1685 [2021-05-03 14:14:42,769 WARN L205 SmtUtils]: Spent 479.00 ms on a formula simplification. DAG size of input: 4607 DAG size of output: 2561 [2021-05-03 14:14:43,750 WARN L205 SmtUtils]: Spent 958.00 ms on a formula simplification. DAG size of input: 6639 DAG size of output: 3850 [2021-05-03 14:14:45,514 WARN L205 SmtUtils]: Spent 1.73 s on a formula simplification. DAG size of input: 10035 DAG size of output: 6098 [2021-05-03 14:14:47,249 WARN L205 SmtUtils]: Spent 1.69 s on a formula simplification. DAG size of input: 10035 DAG size of output: 6098 [2021-05-03 14:14:49,215 WARN L205 SmtUtils]: Spent 1.94 s on a formula simplification. DAG size of input: 10044 DAG size of output: 4867 [2021-05-03 14:14:51,065 WARN L205 SmtUtils]: Spent 1.82 s on a formula simplification. DAG size of input: 4869 DAG size of output: 5961 [2021-05-03 14:14:51,778 WARN L205 SmtUtils]: Spent 689.00 ms on a formula simplification. DAG size of input: 3232 DAG size of output: 3201 [2021-05-03 14:14:52,081 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 1716 DAG size of output: 1601 [2021-05-03 14:14:52,281 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 886 DAG size of output: 1212 [2021-05-03 14:14:52,397 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 662 DAG size of output: 725 [2021-05-03 14:14:53,274 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 2147 DAG size of output: 1025 [2021-05-03 14:14:53,637 WARN L205 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 2055 DAG size of output: 1875 [2021-05-03 14:14:53,877 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 1040 DAG size of output: 1378 [2021-05-03 14:14:54,052 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 765 DAG size of output: 888 [2021-05-03 14:14:55,406 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 1906 DAG size of output: 763 [2021-05-03 14:14:55,620 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 2754 DAG size of output: 1552 [2021-05-03 14:14:55,982 WARN L205 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 4500 DAG size of output: 2202 [2021-05-03 14:14:56,824 WARN L205 SmtUtils]: Spent 813.00 ms on a formula simplification. DAG size of input: 7316 DAG size of output: 3658 [2021-05-03 14:14:57,680 WARN L205 SmtUtils]: Spent 826.00 ms on a formula simplification. DAG size of input: 7316 DAG size of output: 3658 [2021-05-03 14:14:58,464 WARN L205 SmtUtils]: Spent 765.00 ms on a formula simplification. DAG size of input: 7318 DAG size of output: 3448 [2021-05-03 14:14:58,960 WARN L205 SmtUtils]: Spent 449.00 ms on a formula simplification. DAG size of input: 3448 DAG size of output: 2966 [2021-05-03 14:14:59,171 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 1721 DAG size of output: 1717 [2021-05-03 14:15:00,312 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 1172 [2021-05-03 14:15:02,337 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 1224 DAG size of output: 705 [2021-05-03 14:15:02,476 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 1780 DAG size of output: 1038 [2021-05-03 14:15:02,641 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 1351 DAG size of output: 1338 [2021-05-03 14:15:04,969 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 2950 DAG size of output: 1671 [2021-05-03 14:15:05,241 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 2950 DAG size of output: 1671 [2021-05-03 14:15:05,500 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 2953 DAG size of output: 1617 [2021-05-03 14:15:05,736 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 1619 DAG size of output: 1920 [2021-05-03 14:15:05,868 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 1439 DAG size of output: 1413 [2021-05-03 14:15:07,323 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:15:07,731 WARN L205 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-05-03 14:15:07,732 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-05-03 14:15:07,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-05-03 14:15:10,707 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-05-03 14:15:10,997 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:15:10,998 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:15:10,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:15:12,226 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-05-03 14:15:12,250 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-05-03 14:15:12,250 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:15:12,251 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-05-03 14:15:12,284 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:15:12,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:15:12,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-05-03 14:15:12,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811617076] [2021-05-03 14:15:12,285 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-03 14:15:12,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:15:12,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-03 14:15:12,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:15:12,285 INFO L87 Difference]: Start difference. First operand 1022 states and 3333 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:15:13,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:15:13,039 INFO L93 Difference]: Finished difference Result 1132 states and 3572 transitions. [2021-05-03 14:15:13,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 14:15:13,039 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:15:13,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:15:13,041 INFO L225 Difference]: With dead ends: 1132 [2021-05-03 14:15:13,041 INFO L226 Difference]: Without dead ends: 1122 [2021-05-03 14:15:13,041 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 692.2ms TimeCoverageRelationStatistics Valid=159, Invalid=1173, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 14:15:13,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1122 states. [2021-05-03 14:15:13,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1122 to 1022. [2021-05-03 14:15:13,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1022 states, 1021 states have (on average 3.2644466209598435) internal successors, (3333), 1021 states have internal predecessors, (3333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:15:13,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1022 states to 1022 states and 3333 transitions. [2021-05-03 14:15:13,052 INFO L78 Accepts]: Start accepts. Automaton has 1022 states and 3333 transitions. Word has length 20 [2021-05-03 14:15:13,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:15:13,052 INFO L480 AbstractCegarLoop]: Abstraction has 1022 states and 3333 transitions. [2021-05-03 14:15:13,053 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:15:13,053 INFO L276 IsEmpty]: Start isEmpty. Operand 1022 states and 3333 transitions. [2021-05-03 14:15:13,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:15:13,054 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:15:13,054 INFO L551 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:15:13,257 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38493,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:15:13,257 INFO L428 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:15:13,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:15:13,257 INFO L82 PathProgramCache]: Analyzing trace with hash 236725805, now seen corresponding path program 212 times [2021-05-03 14:15:13,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:15:13,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061436579] [2021-05-03 14:15:13,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:15:13,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:15:13,335 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:15:13,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061436579] [2021-05-03 14:15:13,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079312332] [2021-05-03 14:15:13,335 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 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:15:13,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:15:13,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:15:13,377 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 14:15:13,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:15:13,857 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:15:13,857 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:15:13,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:15:14,485 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:15:14,487 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:15:14,487 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:15:14,487 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-05-03 14:15:14,493 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:15:14,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:15:14,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2021-05-03 14:15:14,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303448015] [2021-05-03 14:15:14,494 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 14:15:14,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:15:14,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 14:15:14,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:15:14,494 INFO L87 Difference]: Start difference. First operand 1022 states and 3333 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:15:14,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:15:14,791 INFO L93 Difference]: Finished difference Result 1044 states and 3364 transitions. [2021-05-03 14:15:14,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:15:14,792 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 20 [2021-05-03 14:15:14,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:15:14,793 INFO L225 Difference]: With dead ends: 1044 [2021-05-03 14:15:14,793 INFO L226 Difference]: Without dead ends: 1026 [2021-05-03 14:15:14,793 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 357.2ms TimeCoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:15:14,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1026 states. [2021-05-03 14:15:14,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1026 to 1022. [2021-05-03 14:15:14,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1022 states, 1021 states have (on average 3.2634671890303624) internal successors, (3332), 1021 states have internal predecessors, (3332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:15:14,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1022 states to 1022 states and 3332 transitions. [2021-05-03 14:15:14,804 INFO L78 Accepts]: Start accepts. Automaton has 1022 states and 3332 transitions. Word has length 20 [2021-05-03 14:15:14,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:15:14,804 INFO L480 AbstractCegarLoop]: Abstraction has 1022 states and 3332 transitions. [2021-05-03 14:15:14,804 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:15:14,804 INFO L276 IsEmpty]: Start isEmpty. Operand 1022 states and 3332 transitions. [2021-05-03 14:15:14,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:15:14,805 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:15:14,805 INFO L551 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:15:15,045 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48498 [2021-05-03 14:15:15,045 INFO L428 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:15:15,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:15:15,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1839000147, now seen corresponding path program 213 times [2021-05-03 14:15:15,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:15:15,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737409575] [2021-05-03 14:15:15,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:15:15,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:15:15,183 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 14:15:15,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737409575] [2021-05-03 14:15:15,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217487535] [2021-05-03 14:15:15,183 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 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:15:15,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 14:15:15,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:15:15,219 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 14:15:15,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:15:15,662 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:15:15,662 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:15:15,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:15:16,861 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:15:17,463 WARN L205 SmtUtils]: Spent 545.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-05-03 14:15:17,464 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-05-03 14:15:17,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-05-03 14:15:18,574 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:15:19,029 WARN L205 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-05-03 14:15:19,030 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-05-03 14:15:19,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-05-03 14:15:20,078 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-05-03 14:15:20,398 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:15:20,399 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:15:20,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:15:22,870 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-05-03 14:15:22,894 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-05-03 14:15:22,895 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:15:22,895 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-05-03 14:15:22,940 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:15:22,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:15:22,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-05-03 14:15:22,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626646598] [2021-05-03 14:15:22,941 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 14:15:22,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:15:22,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 14:15:22,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:15:22,941 INFO L87 Difference]: Start difference. First operand 1022 states and 3332 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:15:23,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:15:23,596 INFO L93 Difference]: Finished difference Result 1110 states and 3492 transitions. [2021-05-03 14:15:23,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 14:15:23,596 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:15:23,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:15:23,598 INFO L225 Difference]: With dead ends: 1110 [2021-05-03 14:15:23,598 INFO L226 Difference]: Without dead ends: 1100 [2021-05-03 14:15:23,598 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 537.1ms TimeCoverageRelationStatistics Valid=130, Invalid=862, Unknown=0, NotChecked=0, Total=992 [2021-05-03 14:15:23,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1100 states. [2021-05-03 14:15:23,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1100 to 1022. [2021-05-03 14:15:23,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1022 states, 1021 states have (on average 3.2634671890303624) internal successors, (3332), 1021 states have internal predecessors, (3332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:15:23,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1022 states to 1022 states and 3332 transitions. [2021-05-03 14:15:23,609 INFO L78 Accepts]: Start accepts. Automaton has 1022 states and 3332 transitions. Word has length 20 [2021-05-03 14:15:23,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:15:23,610 INFO L480 AbstractCegarLoop]: Abstraction has 1022 states and 3332 transitions. [2021-05-03 14:15:23,610 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:15:23,610 INFO L276 IsEmpty]: Start isEmpty. Operand 1022 states and 3332 transitions. [2021-05-03 14:15:23,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:15:23,611 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:15:23,611 INFO L551 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:15:23,826 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48749 [2021-05-03 14:15:23,826 INFO L428 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:15:23,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:15:23,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1301144569, now seen corresponding path program 214 times [2021-05-03 14:15:23,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:15:23,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272771697] [2021-05-03 14:15:23,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:15:23,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:15:23,986 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:15:23,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272771697] [2021-05-03 14:15:23,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624227208] [2021-05-03 14:15:23,986 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 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:15:24,007 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:15:24,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:15:24,008 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 14:15:24,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:15:24,506 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:15:24,507 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:15:24,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:15:24,978 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:15:25,696 WARN L205 SmtUtils]: Spent 661.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-05-03 14:15:25,696 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-05-03 14:15:25,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-05-03 14:15:29,581 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 944 DAG size of output: 815 [2021-05-03 14:15:29,768 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 1396 DAG size of output: 1198 [2021-05-03 14:15:29,991 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 1532 DAG size of output: 1392 [2021-05-03 14:15:31,920 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 1060 DAG size of output: 745 [2021-05-03 14:15:32,061 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 1191 DAG size of output: 968 [2021-05-03 14:15:32,210 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 1234 DAG size of output: 957 [2021-05-03 14:15:32,609 WARN L205 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 2306 DAG size of output: 1942 [2021-05-03 14:15:32,993 WARN L205 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 2306 DAG size of output: 1942 [2021-05-03 14:15:33,432 WARN L205 SmtUtils]: Spent 430.00 ms on a formula simplification. DAG size of input: 2314 DAG size of output: 1707 [2021-05-03 14:15:33,812 WARN L205 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 1709 DAG size of output: 1540 [2021-05-03 14:15:35,723 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 1941 DAG size of output: 1087 [2021-05-03 14:15:35,918 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 1941 DAG size of output: 1087 [2021-05-03 14:15:36,110 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 1945 DAG size of output: 968 [2021-05-03 14:15:36,230 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 970 DAG size of output: 684 [2021-05-03 14:15:37,010 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:15:37,479 WARN L205 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-05-03 14:15:37,480 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-05-03 14:15:37,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-05-03 14:15:38,373 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-05-03 14:15:38,713 WARN L205 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:15:38,713 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:15:38,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:15:39,483 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-05-03 14:15:39,507 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-05-03 14:15:39,508 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:15:39,508 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-05-03 14:15:39,544 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:15:39,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:15:39,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-05-03 14:15:39,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716824143] [2021-05-03 14:15:39,545 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 14:15:39,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:15:39,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 14:15:39,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:15:39,545 INFO L87 Difference]: Start difference. First operand 1022 states and 3332 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:15:40,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:15:40,316 INFO L93 Difference]: Finished difference Result 1167 states and 3613 transitions. [2021-05-03 14:15:40,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 14:15:40,316 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:15:40,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:15:40,318 INFO L225 Difference]: With dead ends: 1167 [2021-05-03 14:15:40,318 INFO L226 Difference]: Without dead ends: 1138 [2021-05-03 14:15:40,318 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 675.8ms TimeCoverageRelationStatistics Valid=183, Invalid=1223, Unknown=0, NotChecked=0, Total=1406 [2021-05-03 14:15:40,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1138 states. [2021-05-03 14:15:40,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1138 to 1013. [2021-05-03 14:15:40,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1013 states, 1012 states have (on average 3.257905138339921) internal successors, (3297), 1012 states have internal predecessors, (3297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:15:40,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1013 states to 1013 states and 3297 transitions. [2021-05-03 14:15:40,329 INFO L78 Accepts]: Start accepts. Automaton has 1013 states and 3297 transitions. Word has length 20 [2021-05-03 14:15:40,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:15:40,329 INFO L480 AbstractCegarLoop]: Abstraction has 1013 states and 3297 transitions. [2021-05-03 14:15:40,329 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:15:40,329 INFO L276 IsEmpty]: Start isEmpty. Operand 1013 states and 3297 transitions. [2021-05-03 14:15:40,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:15:40,330 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:15:40,330 INFO L551 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:15:40,531 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 228 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50347 [2021-05-03 14:15:40,531 INFO L428 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:15:40,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:15:40,531 INFO L82 PathProgramCache]: Analyzing trace with hash 188260427, now seen corresponding path program 215 times [2021-05-03 14:15:40,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:15:40,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100180885] [2021-05-03 14:15:40,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:15:40,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:15:40,631 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:15:40,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100180885] [2021-05-03 14:15:40,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41324524] [2021-05-03 14:15:40,632 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 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:15:40,653 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 14:15:40,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:15:40,653 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 14:15:40,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:15:41,060 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:15:41,060 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:15:41,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:15:41,688 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:15:42,244 WARN L205 SmtUtils]: Spent 502.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-05-03 14:15:42,245 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-05-03 14:15:42,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-05-03 14:15:45,203 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:15:45,709 WARN L205 SmtUtils]: Spent 458.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-05-03 14:15:45,709 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-05-03 14:15:45,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-05-03 14:15:46,881 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-05-03 14:15:47,164 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:15:47,164 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:15:47,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:15:48,346 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-05-03 14:15:48,369 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-05-03 14:15:48,370 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:15:48,370 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-05-03 14:15:48,401 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:15:48,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:15:48,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-05-03 14:15:48,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943528669] [2021-05-03 14:15:48,401 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 14:15:48,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:15:48,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 14:15:48,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:15:48,402 INFO L87 Difference]: Start difference. First operand 1013 states and 3297 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:15:48,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:15:48,891 INFO L93 Difference]: Finished difference Result 1092 states and 3464 transitions. [2021-05-03 14:15:48,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 14:15:48,892 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:15:48,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:15:48,893 INFO L225 Difference]: With dead ends: 1092 [2021-05-03 14:15:48,893 INFO L226 Difference]: Without dead ends: 1082 [2021-05-03 14:15:48,893 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 507.9ms TimeCoverageRelationStatistics Valid=142, Invalid=980, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 14:15:48,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2021-05-03 14:15:48,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 1014. [2021-05-03 14:15:48,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1014 states, 1013 states have (on average 3.2576505429417573) internal successors, (3300), 1013 states have internal predecessors, (3300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:15:48,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1014 states to 1014 states and 3300 transitions. [2021-05-03 14:15:48,904 INFO L78 Accepts]: Start accepts. Automaton has 1014 states and 3300 transitions. Word has length 20 [2021-05-03 14:15:48,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:15:48,904 INFO L480 AbstractCegarLoop]: Abstraction has 1014 states and 3300 transitions. [2021-05-03 14:15:48,905 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:15:48,905 INFO L276 IsEmpty]: Start isEmpty. Operand 1014 states and 3300 transitions. [2021-05-03 14:15:48,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:15:48,905 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:15:48,905 INFO L551 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:15:49,106 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52522,229 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:15:49,106 INFO L428 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:15:49,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:15:49,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1807490835, now seen corresponding path program 216 times [2021-05-03 14:15:49,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:15:49,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439250623] [2021-05-03 14:15:49,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:15:49,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:15:49,220 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:15:49,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439250623] [2021-05-03 14:15:49,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027010175] [2021-05-03 14:15:49,220 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 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:15:49,240 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 14:15:49,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:15:49,241 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 14:15:49,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:15:49,642 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:15:49,642 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:15:49,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:15:51,051 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:15:51,653 WARN L205 SmtUtils]: Spent 543.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-05-03 14:15:51,653 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-05-03 14:15:51,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-05-03 14:15:54,543 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 810 DAG size of output: 688 [2021-05-03 14:15:54,925 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 896 DAG size of output: 763 [2021-05-03 14:15:55,068 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 999 DAG size of output: 844 [2021-05-03 14:15:55,244 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 1033 DAG size of output: 875 [2021-05-03 14:15:55,411 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 1251 DAG size of output: 1052 [2021-05-03 14:15:55,580 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 1251 DAG size of output: 1052 [2021-05-03 14:15:55,769 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 1259 DAG size of output: 987 [2021-05-03 14:15:55,893 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 987 DAG size of output: 914 [2021-05-03 14:15:56,033 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 743 DAG size of output: 741 [2021-05-03 14:15:57,321 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 1008 DAG size of output: 565 [2021-05-03 14:15:57,883 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:15:58,326 WARN L205 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-05-03 14:15:58,326 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-05-03 14:15:58,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-05-03 14:15:58,914 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-05-03 14:15:59,247 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:15:59,248 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:15:59,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:16:00,321 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-05-03 14:16:00,345 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-05-03 14:16:00,346 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:16:00,346 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-05-03 14:16:00,386 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:16:00,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:16:00,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-05-03 14:16:00,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125582158] [2021-05-03 14:16:00,386 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-03 14:16:00,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:16:00,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-03 14:16:00,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:16:00,387 INFO L87 Difference]: Start difference. First operand 1014 states and 3300 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:16:01,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:16:01,276 INFO L93 Difference]: Finished difference Result 1229 states and 3755 transitions. [2021-05-03 14:16:01,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-03 14:16:01,276 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:16:01,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:16:01,278 INFO L225 Difference]: With dead ends: 1229 [2021-05-03 14:16:01,278 INFO L226 Difference]: Without dead ends: 1193 [2021-05-03 14:16:01,279 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 717.3ms TimeCoverageRelationStatistics Valid=219, Invalid=1503, Unknown=0, NotChecked=0, Total=1722 [2021-05-03 14:16:01,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1193 states. [2021-05-03 14:16:01,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1193 to 1013. [2021-05-03 14:16:01,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1013 states, 1012 states have (on average 3.2509881422924902) internal successors, (3290), 1012 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:16:01,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1013 states to 1013 states and 3290 transitions. [2021-05-03 14:16:01,291 INFO L78 Accepts]: Start accepts. Automaton has 1013 states and 3290 transitions. Word has length 20 [2021-05-03 14:16:01,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:16:01,291 INFO L480 AbstractCegarLoop]: Abstraction has 1013 states and 3290 transitions. [2021-05-03 14:16:01,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:16:01,291 INFO L276 IsEmpty]: Start isEmpty. Operand 1013 states and 3290 transitions. [2021-05-03 14:16:01,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:16:01,292 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:16:01,293 INFO L551 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:16:01,509 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54652,230 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:16:01,509 INFO L428 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:16:01,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:16:01,509 INFO L82 PathProgramCache]: Analyzing trace with hash -318085839, now seen corresponding path program 217 times [2021-05-03 14:16:01,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:16:01,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606132556] [2021-05-03 14:16:01,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:16:01,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:16:01,642 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:16:01,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606132556] [2021-05-03 14:16:01,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554853033] [2021-05-03 14:16:01,642 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 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:16:01,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:16:01,679 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 14:16:01,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:16:02,172 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:16:02,172 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:16:02,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:16:02,812 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:16:03,480 WARN L205 SmtUtils]: Spent 585.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-05-03 14:16:03,481 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-05-03 14:16:03,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-05-03 14:16:06,951 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:16:07,421 WARN L205 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-05-03 14:16:07,421 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-05-03 14:16:07,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-05-03 14:16:09,046 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-05-03 14:16:09,381 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:16:09,382 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:16:09,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:16:10,068 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-05-03 14:16:10,093 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-05-03 14:16:10,094 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:16:10,094 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-05-03 14:16:10,135 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:16:10,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:16:10,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-05-03 14:16:10,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613796752] [2021-05-03 14:16:10,135 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-03 14:16:10,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:16:10,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-03 14:16:10,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:16:10,136 INFO L87 Difference]: Start difference. First operand 1013 states and 3290 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:16:10,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:16:10,809 INFO L93 Difference]: Finished difference Result 1112 states and 3506 transitions. [2021-05-03 14:16:10,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 14:16:10,809 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:16:10,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:16:10,811 INFO L225 Difference]: With dead ends: 1112 [2021-05-03 14:16:10,811 INFO L226 Difference]: Without dead ends: 1102 [2021-05-03 14:16:10,811 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 677.6ms TimeCoverageRelationStatistics Valid=162, Invalid=1170, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 14:16:10,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1102 states. [2021-05-03 14:16:10,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1102 to 1013. [2021-05-03 14:16:10,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1013 states, 1012 states have (on average 3.2509881422924902) internal successors, (3290), 1012 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:16:10,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1013 states to 1013 states and 3290 transitions. [2021-05-03 14:16:10,823 INFO L78 Accepts]: Start accepts. Automaton has 1013 states and 3290 transitions. Word has length 20 [2021-05-03 14:16:10,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:16:10,823 INFO L480 AbstractCegarLoop]: Abstraction has 1013 states and 3290 transitions. [2021-05-03 14:16:10,823 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:16:10,823 INFO L276 IsEmpty]: Start isEmpty. Operand 1013 states and 3290 transitions. [2021-05-03 14:16:10,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:16:10,824 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:16:10,824 INFO L551 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:16:11,040 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57033 [2021-05-03 14:16:11,040 INFO L428 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:16:11,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:16:11,040 INFO L82 PathProgramCache]: Analyzing trace with hash -1391171219, now seen corresponding path program 218 times [2021-05-03 14:16:11,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:16:11,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256048824] [2021-05-03 14:16:11,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:16:11,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:16:11,202 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:16:11,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256048824] [2021-05-03 14:16:11,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496248956] [2021-05-03 14:16:11,202 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 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:16:11,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:16:11,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:16:11,224 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 14:16:11,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:16:11,718 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:16:11,719 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:16:11,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:16:12,541 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:16:13,185 WARN L205 SmtUtils]: Spent 584.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-05-03 14:16:13,186 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-05-03 14:16:13,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-05-03 14:16:19,623 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:16:20,095 WARN L205 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-05-03 14:16:20,095 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-05-03 14:16:20,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-05-03 14:16:20,987 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-05-03 14:16:21,332 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:16:21,333 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:16:21,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:16:23,315 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-05-03 14:16:23,340 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-05-03 14:16:23,341 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:16:23,341 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-05-03 14:16:23,383 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:16:23,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:16:23,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-05-03 14:16:23,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247230712] [2021-05-03 14:16:23,384 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-03 14:16:23,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:16:23,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-03 14:16:23,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:16:23,384 INFO L87 Difference]: Start difference. First operand 1013 states and 3290 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:16:24,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:16:24,126 INFO L93 Difference]: Finished difference Result 1124 states and 3536 transitions. [2021-05-03 14:16:24,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 14:16:24,126 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:16:24,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:16:24,128 INFO L225 Difference]: With dead ends: 1124 [2021-05-03 14:16:24,128 INFO L226 Difference]: Without dead ends: 1114 [2021-05-03 14:16:24,128 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 715.9ms TimeCoverageRelationStatistics Valid=168, Invalid=1164, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 14:16:24,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2021-05-03 14:16:24,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 1013. [2021-05-03 14:16:24,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1013 states, 1012 states have (on average 3.2509881422924902) internal successors, (3290), 1012 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:16:24,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1013 states to 1013 states and 3290 transitions. [2021-05-03 14:16:24,139 INFO L78 Accepts]: Start accepts. Automaton has 1013 states and 3290 transitions. Word has length 20 [2021-05-03 14:16:24,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:16:24,139 INFO L480 AbstractCegarLoop]: Abstraction has 1013 states and 3290 transitions. [2021-05-03 14:16:24,140 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:16:24,140 INFO L276 IsEmpty]: Start isEmpty. Operand 1013 states and 3290 transitions. [2021-05-03 14:16:24,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:16:24,141 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:16:24,141 INFO L551 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:16:24,357 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58510 [2021-05-03 14:16:24,357 INFO L428 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:16:24,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:16:24,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1401123561, now seen corresponding path program 219 times [2021-05-03 14:16:24,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:16:24,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300609733] [2021-05-03 14:16:24,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:16:24,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:16:24,486 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:16:24,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300609733] [2021-05-03 14:16:24,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989044424] [2021-05-03 14:16:24,486 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 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:16:24,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 14:16:24,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:16:24,509 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 14:16:24,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:16:25,020 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:16:25,021 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:16:25,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:16:27,810 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:16:27,811 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:16:27,811 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:16:27,812 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-05-03 14:16:27,818 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:16:27,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:16:27,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-05-03 14:16:27,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114506750] [2021-05-03 14:16:27,818 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-03 14:16:27,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:16:27,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-03 14:16:27,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:16:27,818 INFO L87 Difference]: Start difference. First operand 1013 states and 3290 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:16:28,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:16:28,642 INFO L93 Difference]: Finished difference Result 1152 states and 3681 transitions. [2021-05-03 14:16:28,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:16:28,642 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:16:28,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:16:28,644 INFO L225 Difference]: With dead ends: 1152 [2021-05-03 14:16:28,644 INFO L226 Difference]: Without dead ends: 1134 [2021-05-03 14:16:28,644 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 454.6ms TimeCoverageRelationStatistics Valid=88, Invalid=724, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:16:28,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1134 states. [2021-05-03 14:16:28,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1134 to 1083. [2021-05-03 14:16:28,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1083 states, 1082 states have (on average 3.2597042513863217) internal successors, (3527), 1082 states have internal predecessors, (3527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:16:28,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1083 states to 1083 states and 3527 transitions. [2021-05-03 14:16:28,658 INFO L78 Accepts]: Start accepts. Automaton has 1083 states and 3527 transitions. Word has length 20 [2021-05-03 14:16:28,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:16:28,658 INFO L480 AbstractCegarLoop]: Abstraction has 1083 states and 3527 transitions. [2021-05-03 14:16:28,658 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:16:28,658 INFO L276 IsEmpty]: Start isEmpty. Operand 1083 states and 3527 transitions. [2021-05-03 14:16:28,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:16:28,659 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:16:28,659 INFO L551 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:16:28,865 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60937,233 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:16:28,865 INFO L428 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:16:28,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:16:28,865 INFO L82 PathProgramCache]: Analyzing trace with hash -2034969205, now seen corresponding path program 220 times [2021-05-03 14:16:28,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:16:28,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186011718] [2021-05-03 14:16:28,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:16:28,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:16:28,995 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:16:28,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186011718] [2021-05-03 14:16:28,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399698739] [2021-05-03 14:16:28,995 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 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:16:29,015 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:16:29,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:16:29,016 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 14:16:29,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:16:29,496 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:16:29,496 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:16:29,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:16:30,464 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:16:31,066 WARN L205 SmtUtils]: Spent 544.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-05-03 14:16:31,067 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-05-03 14:16:31,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-05-03 14:16:34,740 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 1552 DAG size of output: 1319 [2021-05-03 14:16:34,967 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 1737 DAG size of output: 1467 [2021-05-03 14:16:38,034 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 1434 DAG size of output: 1071 [2021-05-03 14:16:40,623 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 2220 DAG size of output: 1675 [2021-05-03 14:16:40,869 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 2377 DAG size of output: 1728 [2021-05-03 14:16:41,229 WARN L205 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 3712 DAG size of output: 2103 [2021-05-03 14:16:41,665 WARN L205 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 3917 DAG size of output: 2236 [2021-05-03 14:16:42,056 WARN L205 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 3917 DAG size of output: 2236 [2021-05-03 14:16:42,523 WARN L205 SmtUtils]: Spent 454.00 ms on a formula simplification. DAG size of input: 3925 DAG size of output: 2095 [2021-05-03 14:16:42,916 WARN L205 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 2097 DAG size of output: 2304 [2021-05-03 14:16:43,330 WARN L205 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 1924 DAG size of output: 2388 [2021-05-03 14:16:43,571 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 1440 DAG size of output: 1438 [2021-05-03 14:16:43,934 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 1340 DAG size of output: 1594 [2021-05-03 14:16:44,675 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 1623 DAG size of output: 1127 [2021-05-03 14:16:44,853 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 1777 DAG size of output: 1199 [2021-05-03 14:16:45,017 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 1113 DAG size of output: 1203 [2021-05-03 14:16:45,125 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 1058 DAG size of output: 1057 [2021-05-03 14:16:46,383 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 2825 DAG size of output: 1765 [2021-05-03 14:16:46,680 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 3256 DAG size of output: 2106 [2021-05-03 14:16:46,981 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 3256 DAG size of output: 2106 [2021-05-03 14:16:47,343 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 3260 DAG size of output: 1866 [2021-05-03 14:16:47,563 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 1866 DAG size of output: 1756 [2021-05-03 14:16:47,760 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 1505 DAG size of output: 1503 [2021-05-03 14:16:49,391 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:16:49,804 WARN L205 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-05-03 14:16:49,804 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-05-03 14:16:49,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-05-03 14:16:51,454 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-05-03 14:16:51,773 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:16:51,774 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:16:51,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:16:52,430 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-05-03 14:16:52,454 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-05-03 14:16:52,455 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:16:52,455 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-05-03 14:16:52,495 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:16:52,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:16:52,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-05-03 14:16:52,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339580352] [2021-05-03 14:16:52,495 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-03 14:16:52,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:16:52,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-03 14:16:52,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:16:52,496 INFO L87 Difference]: Start difference. First operand 1083 states and 3527 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:16:53,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:16:53,591 INFO L93 Difference]: Finished difference Result 1287 states and 4000 transitions. [2021-05-03 14:16:53,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-03 14:16:53,592 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:16:53,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:16:53,594 INFO L225 Difference]: With dead ends: 1287 [2021-05-03 14:16:53,594 INFO L226 Difference]: Without dead ends: 1261 [2021-05-03 14:16:53,594 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 786.8ms TimeCoverageRelationStatistics Valid=221, Invalid=1585, Unknown=0, NotChecked=0, Total=1806 [2021-05-03 14:16:53,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1261 states. [2021-05-03 14:16:53,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1261 to 1094. [2021-05-03 14:16:53,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1094 states, 1093 states have (on average 3.264409881061299) internal successors, (3568), 1093 states have internal predecessors, (3568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:16:53,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1094 states to 1094 states and 3568 transitions. [2021-05-03 14:16:53,607 INFO L78 Accepts]: Start accepts. Automaton has 1094 states and 3568 transitions. Word has length 20 [2021-05-03 14:16:53,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:16:53,607 INFO L480 AbstractCegarLoop]: Abstraction has 1094 states and 3568 transitions. [2021-05-03 14:16:53,607 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:16:53,607 INFO L276 IsEmpty]: Start isEmpty. Operand 1094 states and 3568 transitions. [2021-05-03 14:16:53,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:16:53,608 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:16:53,608 INFO L551 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:16:53,824 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61775 [2021-05-03 14:16:53,824 INFO L428 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:16:53,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:16:53,824 INFO L82 PathProgramCache]: Analyzing trace with hash -324355897, now seen corresponding path program 221 times [2021-05-03 14:16:53,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:16:53,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559102781] [2021-05-03 14:16:53,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:16:53,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:16:53,965 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:16:53,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559102781] [2021-05-03 14:16:53,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103778788] [2021-05-03 14:16:53,965 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 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:16:53,995 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 14:16:53,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:16:53,996 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 14:16:53,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:16:54,496 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:16:54,496 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:16:54,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:16:56,074 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:16:56,691 WARN L205 SmtUtils]: Spent 555.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-05-03 14:16:56,692 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-05-03 14:16:56,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-05-03 14:16:58,689 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 942 DAG size of output: 1225 [2021-05-03 14:16:58,814 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 899 DAG size of output: 1119 [2021-05-03 14:16:58,941 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 890 DAG size of output: 1197 [2021-05-03 14:17:03,634 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 1232 DAG size of output: 1016 [2021-05-03 14:17:04,703 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 1707 DAG size of output: 1387 [2021-05-03 14:17:05,436 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 2023 DAG size of output: 1586 [2021-05-03 14:17:05,664 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 2034 DAG size of output: 1597 [2021-05-03 14:17:06,001 WARN L205 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 2917 DAG size of output: 2148 [2021-05-03 14:17:06,401 WARN L205 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 3311 DAG size of output: 2211 [2021-05-03 14:17:09,974 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 1103 DAG size of output: 915 [2021-05-03 14:17:11,046 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 1590 DAG size of output: 1258 [2021-05-03 14:17:11,252 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 1623 DAG size of output: 1282 [2021-05-03 14:17:11,552 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 2465 DAG size of output: 1821 [2021-05-03 14:17:11,905 WARN L205 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 2554 DAG size of output: 1907 [2021-05-03 14:17:12,455 WARN L205 SmtUtils]: Spent 534.00 ms on a formula simplification. DAG size of input: 5239 DAG size of output: 2986 [2021-05-03 14:17:13,043 WARN L205 SmtUtils]: Spent 565.00 ms on a formula simplification. DAG size of input: 5239 DAG size of output: 2986 [2021-05-03 14:17:13,643 WARN L205 SmtUtils]: Spent 584.00 ms on a formula simplification. DAG size of input: 5246 DAG size of output: 2892 [2021-05-03 14:17:14,173 WARN L205 SmtUtils]: Spent 509.00 ms on a formula simplification. DAG size of input: 2894 DAG size of output: 2814 [2021-05-03 14:17:14,749 WARN L205 SmtUtils]: Spent 555.00 ms on a formula simplification. DAG size of input: 2793 DAG size of output: 3104 [2021-05-03 14:17:15,206 WARN L205 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 2733 DAG size of output: 2732 [2021-05-03 14:17:15,570 WARN L205 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 2709 DAG size of output: 2707 [2021-05-03 14:17:15,981 WARN L205 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 1730 DAG size of output: 2393 [2021-05-03 14:17:16,331 WARN L205 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 1673 DAG size of output: 1979 [2021-05-03 14:17:16,534 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 1632 DAG size of output: 1632 [2021-05-03 14:17:16,730 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 1585 [2021-05-03 14:17:17,635 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 1201 DAG size of output: 1201 [2021-05-03 14:17:17,782 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 1177 DAG size of output: 1177 [2021-05-03 14:17:19,791 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 1801 DAG size of output: 969 [2021-05-03 14:17:20,013 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 2632 DAG size of output: 1574 [2021-05-03 14:17:20,275 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 1291 DAG size of output: 1597 [2021-05-03 14:17:20,463 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 1288 DAG size of output: 1483 [2021-05-03 14:17:20,589 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 1269 DAG size of output: 1266 [2021-05-03 14:17:20,779 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 1236 DAG size of output: 1234 [2021-05-03 14:17:22,594 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 1658 DAG size of output: 1043 [2021-05-03 14:17:22,978 WARN L205 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 3940 DAG size of output: 2067 [2021-05-03 14:17:23,343 WARN L205 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 3972 DAG size of output: 2088 [2021-05-03 14:17:23,756 WARN L205 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 4358 DAG size of output: 2320 [2021-05-03 14:17:24,225 WARN L205 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 4446 DAG size of output: 2402 [2021-05-03 14:17:24,664 WARN L205 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 4446 DAG size of output: 2402 [2021-05-03 14:17:25,132 WARN L205 SmtUtils]: Spent 454.00 ms on a formula simplification. DAG size of input: 4449 DAG size of output: 2196 [2021-05-03 14:17:25,445 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 2198 DAG size of output: 2123 [2021-05-03 14:17:25,673 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 1933 DAG size of output: 1866 [2021-05-03 14:17:25,939 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 1814 DAG size of output: 1812 [2021-05-03 14:17:26,296 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 1626 DAG size of output: 1626 [2021-05-03 14:17:26,587 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 1612 DAG size of output: 1789 [2021-05-03 14:17:26,706 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 1188 DAG size of output: 1185 [2021-05-03 14:17:27,518 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 1009 DAG size of output: 997 [2021-05-03 14:17:28,507 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 1828 DAG size of output: 805 [2021-05-03 14:17:28,670 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 2025 DAG size of output: 950 [2021-05-03 14:17:28,807 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 2025 DAG size of output: 950 [2021-05-03 14:17:28,962 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 2029 DAG size of output: 856 [2021-05-03 14:17:29,428 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:17:29,876 WARN L205 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-05-03 14:17:29,876 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-05-03 14:17:29,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-05-03 14:17:32,469 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 1740 DAG size of output: 1072 [2021-05-03 14:17:32,584 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 1740 DAG size of output: 1072 [2021-05-03 14:17:32,709 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 1745 DAG size of output: 959 [2021-05-03 14:17:34,142 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-05-03 14:17:34,443 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:17:34,444 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:17:34,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:17:37,457 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 2207 DAG size of output: 1109 [2021-05-03 14:17:37,574 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 2207 DAG size of output: 1109 [2021-05-03 14:17:37,741 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 2214 DAG size of output: 1067 [2021-05-03 14:17:38,802 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-05-03 14:17:38,827 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-05-03 14:17:38,827 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:17:38,828 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-05-03 14:17:38,868 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:17:38,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:17:38,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-05-03 14:17:38,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996371031] [2021-05-03 14:17:38,868 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 14:17:38,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:17:38,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 14:17:38,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:17:38,869 INFO L87 Difference]: Start difference. First operand 1094 states and 3568 transitions. Second operand has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:40,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:17:40,176 INFO L93 Difference]: Finished difference Result 1419 states and 4315 transitions. [2021-05-03 14:17:40,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-03 14:17:40,177 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:17:40,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:17:40,179 INFO L225 Difference]: With dead ends: 1419 [2021-05-03 14:17:40,179 INFO L226 Difference]: Without dead ends: 1368 [2021-05-03 14:17:40,179 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 1031.3ms TimeCoverageRelationStatistics Valid=325, Invalid=2225, Unknown=0, NotChecked=0, Total=2550 [2021-05-03 14:17:40,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1368 states. [2021-05-03 14:17:40,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1368 to 1101. [2021-05-03 14:17:40,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1101 states, 1100 states have (on average 3.2572727272727273) internal successors, (3583), 1100 states have internal predecessors, (3583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:40,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1101 states to 1101 states and 3583 transitions. [2021-05-03 14:17:40,194 INFO L78 Accepts]: Start accepts. Automaton has 1101 states and 3583 transitions. Word has length 20 [2021-05-03 14:17:40,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:17:40,194 INFO L480 AbstractCegarLoop]: Abstraction has 1101 states and 3583 transitions. [2021-05-03 14:17:40,194 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:40,194 INFO L276 IsEmpty]: Start isEmpty. Operand 1101 states and 3583 transitions. [2021-05-03 14:17:40,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:17:40,195 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:17:40,195 INFO L551 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:17:40,412 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66967 [2021-05-03 14:17:40,412 INFO L428 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:17:40,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:17:40,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1165049099, now seen corresponding path program 222 times [2021-05-03 14:17:40,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:17:40,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341792344] [2021-05-03 14:17:40,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:17:40,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:17:40,625 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:17:40,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341792344] [2021-05-03 14:17:40,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969281991] [2021-05-03 14:17:40,625 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 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:17:40,647 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 14:17:40,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:17:40,647 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 14:17:40,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:17:41,146 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:17:41,147 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:17:41,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:17:41,467 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:17:42,090 WARN L205 SmtUtils]: Spent 565.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-05-03 14:17:42,091 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-05-03 14:17:42,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-05-03 14:17:45,535 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 1495 DAG size of output: 1041 [2021-05-03 14:17:47,685 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 2068 DAG size of output: 1481 [2021-05-03 14:17:50,574 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 1191 DAG size of output: 969 [2021-05-03 14:17:53,394 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 1943 DAG size of output: 1495 [2021-05-03 14:17:53,703 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 2153 DAG size of output: 1690 [2021-05-03 14:17:54,288 WARN L205 SmtUtils]: Spent 571.00 ms on a formula simplification. DAG size of input: 3881 DAG size of output: 2793 [2021-05-03 14:17:54,838 WARN L205 SmtUtils]: Spent 532.00 ms on a formula simplification. DAG size of input: 3881 DAG size of output: 2793 [2021-05-03 14:17:55,456 WARN L205 SmtUtils]: Spent 605.00 ms on a formula simplification. DAG size of input: 3887 DAG size of output: 2794 [2021-05-03 14:17:56,095 WARN L205 SmtUtils]: Spent 619.00 ms on a formula simplification. DAG size of input: 2796 DAG size of output: 3210 [2021-05-03 14:17:56,391 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 2682 DAG size of output: 1819 [2021-05-03 14:17:56,662 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 1520 DAG size of output: 1830 [2021-05-03 14:17:56,829 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 1469 DAG size of output: 1468 [2021-05-03 14:18:00,347 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 1572 DAG size of output: 922 [2021-05-03 14:18:00,510 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 2034 DAG size of output: 1159 [2021-05-03 14:18:00,715 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 2356 DAG size of output: 1348 [2021-05-03 14:18:00,964 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 2911 DAG size of output: 1644 [2021-05-03 14:18:01,233 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 2911 DAG size of output: 1644 [2021-05-03 14:18:01,506 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 2917 DAG size of output: 1574 [2021-05-03 14:18:01,723 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 1576 DAG size of output: 1448 [2021-05-03 14:18:01,901 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 1393 DAG size of output: 1429 [2021-05-03 14:18:02,047 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 1369 DAG size of output: 1364 [2021-05-03 14:18:02,175 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 1212 DAG size of output: 1141 [2021-05-03 14:18:02,409 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 1058 DAG size of output: 900 [2021-05-03 14:18:03,959 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:18:04,369 WARN L205 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-05-03 14:18:04,370 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-05-03 14:18:04,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-05-03 14:18:05,264 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-05-03 14:18:05,580 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:18:05,580 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:18:05,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:18:06,655 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-05-03 14:18:06,684 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-05-03 14:18:06,685 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:18:06,685 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-05-03 14:18:06,720 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:18:06,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:18:06,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-05-03 14:18:06,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449156981] [2021-05-03 14:18:06,721 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 14:18:06,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:18:06,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 14:18:06,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:18:06,721 INFO L87 Difference]: Start difference. First operand 1101 states and 3583 transitions. Second operand has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:18:07,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:18:07,568 INFO L93 Difference]: Finished difference Result 1223 states and 3861 transitions. [2021-05-03 14:18:07,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-03 14:18:07,569 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:18:07,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:18:07,570 INFO L225 Difference]: With dead ends: 1223 [2021-05-03 14:18:07,570 INFO L226 Difference]: Without dead ends: 1213 [2021-05-03 14:18:07,571 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 840.5ms TimeCoverageRelationStatistics Valid=194, Invalid=1528, Unknown=0, NotChecked=0, Total=1722 [2021-05-03 14:18:07,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1213 states. [2021-05-03 14:18:07,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1213 to 1101. [2021-05-03 14:18:07,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1101 states, 1100 states have (on average 3.2572727272727273) internal successors, (3583), 1100 states have internal predecessors, (3583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:18:07,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1101 states to 1101 states and 3583 transitions. [2021-05-03 14:18:07,582 INFO L78 Accepts]: Start accepts. Automaton has 1101 states and 3583 transitions. Word has length 20 [2021-05-03 14:18:07,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:18:07,582 INFO L480 AbstractCegarLoop]: Abstraction has 1101 states and 3583 transitions. [2021-05-03 14:18:07,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:18:07,582 INFO L276 IsEmpty]: Start isEmpty. Operand 1101 states and 3583 transitions. [2021-05-03 14:18:07,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:18:07,583 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:18:07,583 INFO L551 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:18:07,784 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74430,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:18:07,784 INFO L428 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:18:07,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:18:07,784 INFO L82 PathProgramCache]: Analyzing trace with hash 91963719, now seen corresponding path program 223 times [2021-05-03 14:18:07,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:18:07,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569120609] [2021-05-03 14:18:07,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:18:07,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:18:07,921 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:18:07,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569120609] [2021-05-03 14:18:07,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445831595] [2021-05-03 14:18:07,922 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 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:18:07,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:18:07,942 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 14:18:07,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:18:08,415 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:18:08,415 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:18:08,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:18:09,471 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:18:10,032 WARN L205 SmtUtils]: Spent 507.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-05-03 14:18:10,033 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-05-03 14:18:10,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-05-03 14:18:11,373 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:18:11,785 WARN L205 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-05-03 14:18:11,786 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-05-03 14:18:11,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-05-03 14:18:12,174 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-05-03 14:18:12,467 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:18:12,468 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:18:12,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:18:12,851 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-05-03 14:18:12,876 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-05-03 14:18:12,876 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:18:12,877 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-05-03 14:18:12,951 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:18:12,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:18:12,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-05-03 14:18:12,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365646427] [2021-05-03 14:18:12,952 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 14:18:12,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:18:12,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 14:18:12,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:18:12,952 INFO L87 Difference]: Start difference. First operand 1101 states and 3583 transitions. Second operand has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:18:13,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:18:13,616 INFO L93 Difference]: Finished difference Result 1245 states and 3912 transitions. [2021-05-03 14:18:13,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 14:18:13,617 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:18:13,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:18:13,618 INFO L225 Difference]: With dead ends: 1245 [2021-05-03 14:18:13,618 INFO L226 Difference]: Without dead ends: 1235 [2021-05-03 14:18:13,619 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 752.6ms TimeCoverageRelationStatistics Valid=192, Invalid=1368, Unknown=0, NotChecked=0, Total=1560 [2021-05-03 14:18:13,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1235 states. [2021-05-03 14:18:13,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1235 to 1101. [2021-05-03 14:18:13,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1101 states, 1100 states have (on average 3.2572727272727273) internal successors, (3583), 1100 states have internal predecessors, (3583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:18:13,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1101 states to 1101 states and 3583 transitions. [2021-05-03 14:18:13,631 INFO L78 Accepts]: Start accepts. Automaton has 1101 states and 3583 transitions. Word has length 20 [2021-05-03 14:18:13,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:18:13,631 INFO L480 AbstractCegarLoop]: Abstraction has 1101 states and 3583 transitions. [2021-05-03 14:18:13,631 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:18:13,631 INFO L276 IsEmpty]: Start isEmpty. Operand 1101 states and 3583 transitions. [2021-05-03 14:18:13,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:18:13,632 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:18:13,632 INFO L551 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:18:13,832 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79056 [2021-05-03 14:18:13,832 INFO L428 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:18:13,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:18:13,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1186055307, now seen corresponding path program 224 times [2021-05-03 14:18:13,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:18:13,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751303665] [2021-05-03 14:18:13,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:18:13,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:18:13,962 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:18:13,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751303665] [2021-05-03 14:18:13,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773476160] [2021-05-03 14:18:13,962 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 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:18:13,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:18:13,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:18:13,985 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 14:18:13,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:18:14,451 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:18:14,451 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:18:14,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:18:15,312 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:18:15,863 WARN L205 SmtUtils]: Spent 498.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-05-03 14:18:15,864 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-05-03 14:18:15,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-05-03 14:18:18,720 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:18:19,160 WARN L205 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-05-03 14:18:19,160 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-05-03 14:18:19,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-05-03 14:18:22,309 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-05-03 14:18:22,601 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:18:22,602 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:18:22,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:18:24,821 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 1430 DAG size of output: 962 [2021-05-03 14:18:24,931 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 1430 DAG size of output: 962 [2021-05-03 14:18:25,051 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 1437 DAG size of output: 961 [2021-05-03 14:18:25,171 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 957 DAG size of output: 947 [2021-05-03 14:18:25,843 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-05-03 14:18:25,881 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-05-03 14:18:25,882 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:18:25,882 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-05-03 14:18:25,920 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:18:25,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:18:25,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-05-03 14:18:25,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962134439] [2021-05-03 14:18:25,920 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 14:18:25,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:18:25,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 14:18:25,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:18:25,921 INFO L87 Difference]: Start difference. First operand 1101 states and 3583 transitions. Second operand has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:18:26,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:18:26,798 INFO L93 Difference]: Finished difference Result 1256 states and 3935 transitions. [2021-05-03 14:18:26,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-03 14:18:26,799 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:18:26,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:18:26,801 INFO L225 Difference]: With dead ends: 1256 [2021-05-03 14:18:26,801 INFO L226 Difference]: Without dead ends: 1246 [2021-05-03 14:18:26,801 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 810.8ms TimeCoverageRelationStatistics Valid=198, Invalid=1362, Unknown=0, NotChecked=0, Total=1560 [2021-05-03 14:18:26,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1246 states. [2021-05-03 14:18:26,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1246 to 1101. [2021-05-03 14:18:26,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1101 states, 1100 states have (on average 3.2572727272727273) internal successors, (3583), 1100 states have internal predecessors, (3583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:18:26,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1101 states to 1101 states and 3583 transitions. [2021-05-03 14:18:26,814 INFO L78 Accepts]: Start accepts. Automaton has 1101 states and 3583 transitions. Word has length 20 [2021-05-03 14:18:26,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:18:26,814 INFO L480 AbstractCegarLoop]: Abstraction has 1101 states and 3583 transitions. [2021-05-03 14:18:26,814 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:18:26,814 INFO L276 IsEmpty]: Start isEmpty. Operand 1101 states and 3583 transitions. [2021-05-03 14:18:26,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:18:26,815 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:18:26,815 INFO L551 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:18:27,029 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80103,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:18:27,029 INFO L428 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:18:27,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:18:27,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1474726761, now seen corresponding path program 225 times [2021-05-03 14:18:27,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:18:27,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522177905] [2021-05-03 14:18:27,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:18:27,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:18:27,125 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 14:18:27,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522177905] [2021-05-03 14:18:27,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089251971] [2021-05-03 14:18:27,125 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 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:18:27,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 14:18:27,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:18:27,150 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 14:18:27,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:18:27,600 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:18:27,601 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:18:27,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:18:28,306 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:18:28,308 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:18:28,308 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:18:28,308 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-05-03 14:18:28,314 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:18:28,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:18:28,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-05-03 14:18:28,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951709772] [2021-05-03 14:18:28,315 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 14:18:28,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:18:28,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 14:18:28,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:18:28,315 INFO L87 Difference]: Start difference. First operand 1101 states and 3583 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:18:28,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:18:28,864 INFO L93 Difference]: Finished difference Result 1134 states and 3635 transitions. [2021-05-03 14:18:28,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 14:18:28,865 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:18:28,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:18:28,867 INFO L225 Difference]: With dead ends: 1134 [2021-05-03 14:18:28,867 INFO L226 Difference]: Without dead ends: 1116 [2021-05-03 14:18:28,867 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 412.9ms TimeCoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:18:28,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2021-05-03 14:18:28,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 1101. [2021-05-03 14:18:28,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1101 states, 1100 states have (on average 3.2563636363636363) internal successors, (3582), 1100 states have internal predecessors, (3582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:18:28,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1101 states to 1101 states and 3582 transitions. [2021-05-03 14:18:28,879 INFO L78 Accepts]: Start accepts. Automaton has 1101 states and 3582 transitions. Word has length 20 [2021-05-03 14:18:28,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:18:28,879 INFO L480 AbstractCegarLoop]: Abstraction has 1101 states and 3582 transitions. [2021-05-03 14:18:28,879 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:18:28,879 INFO L276 IsEmpty]: Start isEmpty. Operand 1101 states and 3582 transitions. [2021-05-03 14:18:28,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:18:28,880 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:18:28,880 INFO L551 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:18:29,096 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82751 [2021-05-03 14:18:29,096 INFO L428 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:18:29,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:18:29,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1523192139, now seen corresponding path program 226 times [2021-05-03 14:18:29,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:18:29,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196650068] [2021-05-03 14:18:29,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:18:29,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:18:29,224 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:18:29,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196650068] [2021-05-03 14:18:29,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836762909] [2021-05-03 14:18:29,224 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 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:18:29,245 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:18:29,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:18:29,246 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 14:18:29,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:18:29,762 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:18:29,763 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:18:29,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:18:30,233 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:18:30,847 WARN L205 SmtUtils]: Spent 554.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-05-03 14:18:30,847 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-05-03 14:18:30,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-05-03 14:18:34,491 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 1644 DAG size of output: 1042 [2021-05-03 14:18:34,647 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 1762 DAG size of output: 1121 [2021-05-03 14:18:34,805 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 1762 DAG size of output: 1121 [2021-05-03 14:18:34,978 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 1772 DAG size of output: 1079 [2021-05-03 14:18:35,172 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 1081 DAG size of output: 1243 [2021-05-03 14:18:35,285 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 944 DAG size of output: 971 [2021-05-03 14:18:35,433 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 907 DAG size of output: 1019 [2021-05-03 14:18:37,290 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:18:37,756 WARN L205 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-05-03 14:18:37,757 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-05-03 14:18:37,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-05-03 14:18:38,341 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-05-03 14:18:38,665 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:18:38,666 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:18:38,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:18:39,205 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-05-03 14:18:39,231 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-05-03 14:18:39,232 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:18:39,232 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-05-03 14:18:39,270 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:18:39,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:18:39,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-05-03 14:18:39,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214244679] [2021-05-03 14:18:39,285 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 14:18:39,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:18:39,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 14:18:39,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:18:39,285 INFO L87 Difference]: Start difference. First operand 1101 states and 3582 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:18:40,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:18:40,133 INFO L93 Difference]: Finished difference Result 1226 states and 3844 transitions. [2021-05-03 14:18:40,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-03 14:18:40,133 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:18:40,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:18:40,135 INFO L225 Difference]: With dead ends: 1226 [2021-05-03 14:18:40,135 INFO L226 Difference]: Without dead ends: 1216 [2021-05-03 14:18:40,135 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 671.3ms TimeCoverageRelationStatistics Valid=185, Invalid=1297, Unknown=0, NotChecked=0, Total=1482 [2021-05-03 14:18:40,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1216 states. [2021-05-03 14:18:40,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1216 to 1101. [2021-05-03 14:18:40,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1101 states, 1100 states have (on average 3.2563636363636363) internal successors, (3582), 1100 states have internal predecessors, (3582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:18:40,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1101 states to 1101 states and 3582 transitions. [2021-05-03 14:18:40,146 INFO L78 Accepts]: Start accepts. Automaton has 1101 states and 3582 transitions. Word has length 20 [2021-05-03 14:18:40,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:18:40,146 INFO L480 AbstractCegarLoop]: Abstraction has 1101 states and 3582 transitions. [2021-05-03 14:18:40,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:18:40,146 INFO L276 IsEmpty]: Start isEmpty. Operand 1101 states and 3582 transitions. [2021-05-03 14:18:40,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:18:40,147 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:18:40,147 INFO L551 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:18:40,361 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83029 [2021-05-03 14:18:40,361 INFO L428 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:18:40,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:18:40,361 INFO L82 PathProgramCache]: Analyzing trace with hash -2029538405, now seen corresponding path program 227 times [2021-05-03 14:18:40,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:18:40,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593373874] [2021-05-03 14:18:40,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:18:40,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:18:40,489 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:18:40,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593373874] [2021-05-03 14:18:40,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680512505] [2021-05-03 14:18:40,489 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 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:18:40,525 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 14:18:40,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:18:40,529 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 14:18:40,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:18:41,045 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:18:41,046 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:18:41,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:18:42,126 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:18:42,683 WARN L205 SmtUtils]: Spent 503.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-05-03 14:18:42,684 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-05-03 14:18:42,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-05-03 14:18:46,642 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 1577 DAG size of output: 804 [2021-05-03 14:18:46,768 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 1720 DAG size of output: 875 [2021-05-03 14:18:46,923 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 1720 DAG size of output: 875 [2021-05-03 14:18:47,065 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 1730 DAG size of output: 823 [2021-05-03 14:18:47,213 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 825 DAG size of output: 888 [2021-05-03 14:18:48,846 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 1555 DAG size of output: 839 [2021-05-03 14:18:48,970 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 1555 DAG size of output: 839 [2021-05-03 14:18:49,097 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 1561 DAG size of output: 841 [2021-05-03 14:18:49,920 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:18:50,348 WARN L205 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-05-03 14:18:50,349 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-05-03 14:18:50,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-05-03 14:18:51,611 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-05-03 14:18:51,903 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:18:51,903 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:18:51,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:18:52,450 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-05-03 14:18:52,473 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-05-03 14:18:52,473 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:18:52,473 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-05-03 14:18:52,505 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:18:52,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:18:52,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-05-03 14:18:52,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717899839] [2021-05-03 14:18:52,506 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-03 14:18:52,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:18:52,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-03 14:18:52,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:18:52,506 INFO L87 Difference]: Start difference. First operand 1101 states and 3582 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:18:53,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:18:53,414 INFO L93 Difference]: Finished difference Result 1304 states and 4040 transitions. [2021-05-03 14:18:53,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-03 14:18:53,415 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:18:53,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:18:53,417 INFO L225 Difference]: With dead ends: 1304 [2021-05-03 14:18:53,417 INFO L226 Difference]: Without dead ends: 1275 [2021-05-03 14:18:53,417 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 803.4ms TimeCoverageRelationStatistics Valid=238, Invalid=1654, Unknown=0, NotChecked=0, Total=1892 [2021-05-03 14:18:53,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2021-05-03 14:18:53,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 1087. [2021-05-03 14:18:53,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1087 states, 1086 states have (on average 3.2523020257826887) internal successors, (3532), 1086 states have internal predecessors, (3532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:18:53,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1087 states to 1087 states and 3532 transitions. [2021-05-03 14:18:53,428 INFO L78 Accepts]: Start accepts. Automaton has 1087 states and 3532 transitions. Word has length 20 [2021-05-03 14:18:53,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:18:53,429 INFO L480 AbstractCegarLoop]: Abstraction has 1087 states and 3532 transitions. [2021-05-03 14:18:53,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:18:53,429 INFO L276 IsEmpty]: Start isEmpty. Operand 1087 states and 3532 transitions. [2021-05-03 14:18:53,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:18:53,430 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:18:53,430 INFO L551 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:18:53,630 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84705 [2021-05-03 14:18:53,630 INFO L428 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:18:53,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:18:53,631 INFO L82 PathProgramCache]: Analyzing trace with hash 1192343511, now seen corresponding path program 228 times [2021-05-03 14:18:53,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:18:53,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649227681] [2021-05-03 14:18:53,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:18:53,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:18:53,744 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:18:53,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649227681] [2021-05-03 14:18:53,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484805256] [2021-05-03 14:18:53,744 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 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:18:53,764 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 14:18:53,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:18:53,765 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 14:18:53,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:18:54,262 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:18:54,263 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:18:54,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:18:55,149 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:18:55,752 WARN L205 SmtUtils]: Spent 545.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-05-03 14:18:55,752 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-05-03 14:18:55,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-05-03 14:18:56,801 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:18:57,226 WARN L205 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-05-03 14:18:57,227 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-05-03 14:18:57,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-05-03 14:18:57,701 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-05-03 14:18:57,999 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:18:57,999 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:18:57,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:19:00,529 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-05-03 14:19:00,554 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-05-03 14:19:00,554 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:19:00,554 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-05-03 14:19:00,588 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:19:00,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:19:00,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-05-03 14:19:00,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722539153] [2021-05-03 14:19:00,588 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-03 14:19:00,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:19:00,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-03 14:19:00,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:19:00,588 INFO L87 Difference]: Start difference. First operand 1087 states and 3532 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:19:01,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:19:01,279 INFO L93 Difference]: Finished difference Result 1205 states and 3790 transitions. [2021-05-03 14:19:01,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 14:19:01,279 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:19:01,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:19:01,280 INFO L225 Difference]: With dead ends: 1205 [2021-05-03 14:19:01,280 INFO L226 Difference]: Without dead ends: 1195 [2021-05-03 14:19:01,281 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 673.4ms TimeCoverageRelationStatistics Valid=184, Invalid=1298, Unknown=0, NotChecked=0, Total=1482 [2021-05-03 14:19:01,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2021-05-03 14:19:01,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 1088. [2021-05-03 14:19:01,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1088 states, 1087 states have (on average 3.252069917203312) internal successors, (3535), 1087 states have internal predecessors, (3535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:19:01,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1088 states to 1088 states and 3535 transitions. [2021-05-03 14:19:01,291 INFO L78 Accepts]: Start accepts. Automaton has 1088 states and 3535 transitions. Word has length 20 [2021-05-03 14:19:01,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:19:01,291 INFO L480 AbstractCegarLoop]: Abstraction has 1088 states and 3535 transitions. [2021-05-03 14:19:01,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:19:01,291 INFO L276 IsEmpty]: Start isEmpty. Operand 1088 states and 3535 transitions. [2021-05-03 14:19:01,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:19:01,292 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:19:01,292 INFO L551 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:19:01,493 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88230 [2021-05-03 14:19:01,493 INFO L428 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:19:01,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:19:01,493 INFO L82 PathProgramCache]: Analyzing trace with hash -546403467, now seen corresponding path program 229 times [2021-05-03 14:19:01,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:19:01,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046139052] [2021-05-03 14:19:01,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:19:01,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:19:01,622 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:19:01,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046139052] [2021-05-03 14:19:01,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020543317] [2021-05-03 14:19:01,623 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 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:19:01,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:19:01,642 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 14:19:01,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:19:02,093 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:19:02,093 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:19:02,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:19:02,429 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:19:02,981 WARN L205 SmtUtils]: Spent 499.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-05-03 14:19:02,982 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-05-03 14:19:02,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-05-03 14:19:04,543 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:19:04,970 WARN L205 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-05-03 14:19:04,971 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-05-03 14:19:04,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-05-03 14:19:06,721 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-05-03 14:19:07,039 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:19:07,039 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:19:07,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:19:07,918 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-05-03 14:19:07,949 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-05-03 14:19:07,950 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:19:07,950 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-05-03 14:19:07,984 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:19:07,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:19:07,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-05-03 14:19:07,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641448765] [2021-05-03 14:19:07,984 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 14:19:07,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:19:07,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 14:19:07,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:19:07,985 INFO L87 Difference]: Start difference. First operand 1088 states and 3535 transitions. Second operand has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:19:09,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:19:09,148 INFO L93 Difference]: Finished difference Result 1402 states and 4255 transitions. [2021-05-03 14:19:09,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-03 14:19:09,148 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:19:09,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:19:09,150 INFO L225 Difference]: With dead ends: 1402 [2021-05-03 14:19:09,150 INFO L226 Difference]: Without dead ends: 1361 [2021-05-03 14:19:09,150 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 931.6ms TimeCoverageRelationStatistics Valid=317, Invalid=2335, Unknown=0, NotChecked=0, Total=2652 [2021-05-03 14:19:09,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1361 states. [2021-05-03 14:19:09,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1361 to 1091. [2021-05-03 14:19:09,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1091 states, 1090 states have (on average 3.244954128440367) internal successors, (3537), 1090 states have internal predecessors, (3537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:19:09,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1091 states to 1091 states and 3537 transitions. [2021-05-03 14:19:09,162 INFO L78 Accepts]: Start accepts. Automaton has 1091 states and 3537 transitions. Word has length 20 [2021-05-03 14:19:09,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:19:09,162 INFO L480 AbstractCegarLoop]: Abstraction has 1091 states and 3537 transitions. [2021-05-03 14:19:09,162 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:19:09,162 INFO L276 IsEmpty]: Start isEmpty. Operand 1091 states and 3537 transitions. [2021-05-03 14:19:09,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:19:09,163 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:19:09,163 INFO L551 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:19:09,364 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89984 [2021-05-03 14:19:09,364 INFO L428 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:19:09,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:19:09,364 INFO L82 PathProgramCache]: Analyzing trace with hash -1619488847, now seen corresponding path program 230 times [2021-05-03 14:19:09,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:19:09,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148613227] [2021-05-03 14:19:09,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:19:09,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:19:09,510 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:19:09,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148613227] [2021-05-03 14:19:09,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899761669] [2021-05-03 14:19:09,510 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 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:19:09,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:19:09,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:19:09,531 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 14:19:09,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:19:10,033 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:19:10,033 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:19:10,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:19:10,397 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:19:10,986 WARN L205 SmtUtils]: Spent 532.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-05-03 14:19:10,986 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-05-03 14:19:10,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-05-03 14:19:12,720 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:19:13,138 WARN L205 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-05-03 14:19:13,138 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-05-03 14:19:13,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-05-03 14:19:15,613 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-05-03 14:19:15,915 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:19:15,915 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:19:15,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:19:17,258 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-05-03 14:19:17,285 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-05-03 14:19:17,285 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:19:17,286 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-05-03 14:19:17,327 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:19:17,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:19:17,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-05-03 14:19:17,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29061204] [2021-05-03 14:19:17,328 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 14:19:17,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:19:17,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 14:19:17,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:19:17,328 INFO L87 Difference]: Start difference. First operand 1091 states and 3537 transitions. Second operand has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:19:18,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:19:18,102 INFO L93 Difference]: Finished difference Result 1239 states and 3871 transitions. [2021-05-03 14:19:18,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 14:19:18,102 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:19:18,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:19:18,104 INFO L225 Difference]: With dead ends: 1239 [2021-05-03 14:19:18,104 INFO L226 Difference]: Without dead ends: 1229 [2021-05-03 14:19:18,104 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 839.5ms TimeCoverageRelationStatistics Valid=208, Invalid=1514, Unknown=0, NotChecked=0, Total=1722 [2021-05-03 14:19:18,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1229 states. [2021-05-03 14:19:18,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1229 to 1091. [2021-05-03 14:19:18,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1091 states, 1090 states have (on average 3.244954128440367) internal successors, (3537), 1090 states have internal predecessors, (3537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:19:18,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1091 states to 1091 states and 3537 transitions. [2021-05-03 14:19:18,116 INFO L78 Accepts]: Start accepts. Automaton has 1091 states and 3537 transitions. Word has length 20 [2021-05-03 14:19:18,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:19:18,116 INFO L480 AbstractCegarLoop]: Abstraction has 1091 states and 3537 transitions. [2021-05-03 14:19:18,116 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:19:18,116 INFO L276 IsEmpty]: Start isEmpty. Operand 1091 states and 3537 transitions. [2021-05-03 14:19:18,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:19:18,117 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:19:18,117 INFO L551 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:19:18,318 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91410,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:19:18,318 INFO L428 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:19:18,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:19:18,319 INFO L82 PathProgramCache]: Analyzing trace with hash -525397259, now seen corresponding path program 231 times [2021-05-03 14:19:18,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:19:18,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139033660] [2021-05-03 14:19:18,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:19:18,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:19:18,514 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:19:18,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139033660] [2021-05-03 14:19:18,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970780070] [2021-05-03 14:19:18,514 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 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:19:18,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 14:19:18,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:19:18,547 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 14:19:18,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:19:19,012 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 2665 DAG size of output: 49 [2021-05-03 14:19:19,357 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:19:19,358 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:19:19,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:19:21,722 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:19:22,380 WARN L205 SmtUtils]: Spent 564.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-05-03 14:19:22,380 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-05-03 14:19:22,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-05-03 14:19:27,300 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 1250 DAG size of output: 840 [2021-05-03 14:19:28,384 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 1646 DAG size of output: 977 [2021-05-03 14:19:28,533 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 1646 DAG size of output: 977 [2021-05-03 14:19:28,693 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 1648 DAG size of output: 894 [2021-05-03 14:19:28,806 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 896 DAG size of output: 881 [2021-05-03 14:19:29,794 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:19:30,248 WARN L205 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-05-03 14:19:30,248 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-05-03 14:19:30,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-05-03 14:19:31,316 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-05-03 14:19:31,637 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:19:31,637 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:19:31,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:19:32,230 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-05-03 14:19:32,254 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-05-03 14:19:32,254 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:19:32,254 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-05-03 14:19:32,288 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:19:32,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:19:32,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-05-03 14:19:32,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148152703] [2021-05-03 14:19:32,289 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 14:19:32,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:19:32,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 14:19:32,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:19:32,289 INFO L87 Difference]: Start difference. First operand 1091 states and 3537 transitions. Second operand has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:19:33,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:19:33,048 INFO L93 Difference]: Finished difference Result 1242 states and 3880 transitions. [2021-05-03 14:19:33,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 14:19:33,049 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:19:33,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:19:33,050 INFO L225 Difference]: With dead ends: 1242 [2021-05-03 14:19:33,050 INFO L226 Difference]: Without dead ends: 1232 [2021-05-03 14:19:33,051 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 926.6ms TimeCoverageRelationStatistics Valid=214, Invalid=1508, Unknown=0, NotChecked=0, Total=1722 [2021-05-03 14:19:33,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1232 states. [2021-05-03 14:19:33,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1232 to 1091. [2021-05-03 14:19:33,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1091 states, 1090 states have (on average 3.244954128440367) internal successors, (3537), 1090 states have internal predecessors, (3537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:19:33,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1091 states to 1091 states and 3537 transitions. [2021-05-03 14:19:33,063 INFO L78 Accepts]: Start accepts. Automaton has 1091 states and 3537 transitions. Word has length 20 [2021-05-03 14:19:33,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:19:33,063 INFO L480 AbstractCegarLoop]: Abstraction has 1091 states and 3537 transitions. [2021-05-03 14:19:33,063 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:19:33,063 INFO L276 IsEmpty]: Start isEmpty. Operand 1091 states and 3537 transitions. [2021-05-03 14:19:33,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:19:33,064 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:19:33,064 INFO L551 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:19:33,264 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93151 [2021-05-03 14:19:33,265 INFO L428 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:19:33,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:19:33,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1577786183, now seen corresponding path program 232 times [2021-05-03 14:19:33,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:19:33,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309986212] [2021-05-03 14:19:33,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:19:33,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:19:33,407 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:19:33,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309986212] [2021-05-03 14:19:33,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751796605] [2021-05-03 14:19:33,407 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 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:19:33,426 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:19:33,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:19:33,427 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 14:19:33,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:19:33,841 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:19:33,841 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:19:33,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:19:35,129 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:19:35,130 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:19:35,131 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:19:35,131 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-05-03 14:19:35,138 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:19:35,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:19:35,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-05-03 14:19:35,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108708358] [2021-05-03 14:19:35,138 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-03 14:19:35,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:19:35,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-03 14:19:35,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:19:35,139 INFO L87 Difference]: Start difference. First operand 1091 states and 3537 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:19:35,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:19:35,660 INFO L93 Difference]: Finished difference Result 1298 states and 4152 transitions. [2021-05-03 14:19:35,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:19:35,661 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:19:35,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:19:35,662 INFO L225 Difference]: With dead ends: 1298 [2021-05-03 14:19:35,663 INFO L226 Difference]: Without dead ends: 1282 [2021-05-03 14:19:35,663 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 423.8ms TimeCoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:19:35,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1282 states. [2021-05-03 14:19:35,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1282 to 1246. [2021-05-03 14:19:35,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1246 states, 1245 states have (on average 3.2497991967871487) internal successors, (4046), 1245 states have internal predecessors, (4046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:19:35,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1246 states to 1246 states and 4046 transitions. [2021-05-03 14:19:35,677 INFO L78 Accepts]: Start accepts. Automaton has 1246 states and 4046 transitions. Word has length 20 [2021-05-03 14:19:35,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:19:35,677 INFO L480 AbstractCegarLoop]: Abstraction has 1246 states and 4046 transitions. [2021-05-03 14:19:35,677 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:19:35,677 INFO L276 IsEmpty]: Start isEmpty. Operand 1246 states and 4046 transitions. [2021-05-03 14:19:35,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:19:35,678 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:19:35,678 INFO L551 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:19:35,893 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96462,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:19:35,893 INFO L428 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:19:35,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:19:35,893 INFO L82 PathProgramCache]: Analyzing trace with hash -718911653, now seen corresponding path program 233 times [2021-05-03 14:19:35,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:19:35,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128059279] [2021-05-03 14:19:35,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:19:35,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:19:36,036 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:19:36,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128059279] [2021-05-03 14:19:36,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465666338] [2021-05-03 14:19:36,037 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 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:19:36,071 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 14:19:36,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:19:36,075 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 14:19:36,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:19:36,547 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:19:36,547 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:19:36,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:19:37,615 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:19:38,237 WARN L205 SmtUtils]: Spent 561.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-05-03 14:19:38,238 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-05-03 14:19:38,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-05-03 14:19:41,042 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:19:41,495 WARN L205 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-05-03 14:19:41,496 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-05-03 14:19:41,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-05-03 14:19:43,767 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-05-03 14:19:44,106 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:19:44,106 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:19:44,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:19:44,850 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-05-03 14:19:44,874 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-05-03 14:19:44,875 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:19:44,875 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-05-03 14:19:44,910 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:19:44,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:19:44,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-05-03 14:19:44,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296538653] [2021-05-03 14:19:44,911 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-03 14:19:44,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:19:44,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-03 14:19:44,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:19:44,911 INFO L87 Difference]: Start difference. First operand 1246 states and 4046 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:19:46,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:19:46,226 INFO L93 Difference]: Finished difference Result 1420 states and 4449 transitions. [2021-05-03 14:19:46,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-03 14:19:46,226 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:19:46,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:19:46,228 INFO L225 Difference]: With dead ends: 1420 [2021-05-03 14:19:46,228 INFO L226 Difference]: Without dead ends: 1396 [2021-05-03 14:19:46,228 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 889.8ms TimeCoverageRelationStatistics Valid=258, Invalid=2192, Unknown=0, NotChecked=0, Total=2450 [2021-05-03 14:19:46,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1396 states. [2021-05-03 14:19:46,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1396 to 1250. [2021-05-03 14:19:46,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1250 states, 1249 states have (on average 3.2514011208967175) internal successors, (4061), 1249 states have internal predecessors, (4061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:19:46,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1250 states to 1250 states and 4061 transitions. [2021-05-03 14:19:46,242 INFO L78 Accepts]: Start accepts. Automaton has 1250 states and 4061 transitions. Word has length 20 [2021-05-03 14:19:46,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:19:46,242 INFO L480 AbstractCegarLoop]: Abstraction has 1250 states and 4061 transitions. [2021-05-03 14:19:46,242 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:19:46,242 INFO L276 IsEmpty]: Start isEmpty. Operand 1250 states and 4061 transitions. [2021-05-03 14:19:46,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:19:46,243 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:19:46,243 INFO L551 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:19:46,445 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96939,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:19:46,445 INFO L428 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:19:46,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:19:46,445 INFO L82 PathProgramCache]: Analyzing trace with hash 991701655, now seen corresponding path program 234 times [2021-05-03 14:19:46,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:19:46,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761543068] [2021-05-03 14:19:46,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:19:46,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:19:46,585 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:19:46,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761543068] [2021-05-03 14:19:46,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156078259] [2021-05-03 14:19:46,585 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 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:19:46,604 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:19:46,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:19:46,605 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 14:19:46,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:19:47,054 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:19:47,055 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:19:47,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:19:47,645 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:19:48,206 WARN L205 SmtUtils]: Spent 506.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-05-03 14:19:48,206 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-05-03 14:19:48,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-05-03 14:19:51,686 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:19:52,379 WARN L205 SmtUtils]: Spent 638.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-05-03 14:19:52,379 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-05-03 14:19:52,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-05-03 14:19:54,901 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-05-03 14:19:55,250 WARN L205 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:19:55,250 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:19:55,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:19:57,539 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-05-03 14:19:57,566 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-05-03 14:19:57,567 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:19:57,567 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-05-03 14:19:57,605 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:19:57,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:19:57,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-05-03 14:19:57,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541883636] [2021-05-03 14:19:57,605 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-03 14:19:57,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:19:57,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-03 14:19:57,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=580, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:19:57,605 INFO L87 Difference]: Start difference. First operand 1250 states and 4061 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:19:58,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:19:58,411 INFO L93 Difference]: Finished difference Result 1412 states and 4448 transitions. [2021-05-03 14:19:58,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-03 14:19:58,412 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:19:58,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:19:58,414 INFO L225 Difference]: With dead ends: 1412 [2021-05-03 14:19:58,414 INFO L226 Difference]: Without dead ends: 1402 [2021-05-03 14:19:58,414 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 724.1ms TimeCoverageRelationStatistics Valid=176, Invalid=1630, Unknown=0, NotChecked=0, Total=1806 [2021-05-03 14:19:58,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1402 states. [2021-05-03 14:19:58,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1402 to 1278. [2021-05-03 14:19:58,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1278 states, 1277 states have (on average 3.2537196554424432) internal successors, (4155), 1277 states have internal predecessors, (4155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:19:58,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1278 states to 1278 states and 4155 transitions. [2021-05-03 14:19:58,428 INFO L78 Accepts]: Start accepts. Automaton has 1278 states and 4155 transitions. Word has length 20 [2021-05-03 14:19:58,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:19:58,428 INFO L480 AbstractCegarLoop]: Abstraction has 1278 states and 4155 transitions. [2021-05-03 14:19:58,428 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:19:58,428 INFO L276 IsEmpty]: Start isEmpty. Operand 1278 states and 4155 transitions. [2021-05-03 14:19:58,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:19:58,429 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:19:58,429 INFO L551 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:19:58,629 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98840,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:19:58,630 INFO L428 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:19:58,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:19:58,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1813860645, now seen corresponding path program 235 times [2021-05-03 14:19:58,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:19:58,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155370380] [2021-05-03 14:19:58,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:19:58,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:19:58,796 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:19:58,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155370380] [2021-05-03 14:19:58,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894350952] [2021-05-03 14:19:58,797 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 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:19:58,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:19:58,816 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 14:19:58,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:19:59,276 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:19:59,277 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:19:59,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:19:59,716 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:20:00,315 WARN L205 SmtUtils]: Spent 543.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-05-03 14:20:00,316 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-05-03 14:20:00,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-05-03 14:20:04,879 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 1954 DAG size of output: 1250 [2021-05-03 14:20:05,057 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 1954 DAG size of output: 1250 [2021-05-03 14:20:05,249 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 1960 DAG size of output: 1255 [2021-05-03 14:20:05,420 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 1257 DAG size of output: 1103 [2021-05-03 14:20:07,240 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:20:07,788 WARN L205 SmtUtils]: Spent 496.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-05-03 14:20:07,788 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-05-03 14:20:07,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-05-03 14:20:10,906 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 1359 DAG size of output: 1107 [2021-05-03 14:20:11,066 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 1359 DAG size of output: 1107 [2021-05-03 14:20:11,244 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 1364 DAG size of output: 980 [2021-05-03 14:20:11,367 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 980 DAG size of output: 952 [2021-05-03 14:20:14,582 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-05-03 14:20:14,920 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:20:14,921 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:20:14,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:20:17,925 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-05-03 14:20:17,950 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-05-03 14:20:17,951 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:20:17,951 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-05-03 14:20:17,991 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:20:17,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:20:17,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-05-03 14:20:17,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830360025] [2021-05-03 14:20:17,992 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 14:20:17,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:20:17,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 14:20:17,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=629, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:20:17,992 INFO L87 Difference]: Start difference. First operand 1278 states and 4155 transitions. Second operand has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:20:19,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:20:19,039 INFO L93 Difference]: Finished difference Result 1498 states and 4645 transitions. [2021-05-03 14:20:19,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-03 14:20:19,040 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:20:19,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:20:19,042 INFO L225 Difference]: With dead ends: 1498 [2021-05-03 14:20:19,042 INFO L226 Difference]: Without dead ends: 1481 [2021-05-03 14:20:19,042 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 912.2ms TimeCoverageRelationStatistics Valid=237, Invalid=2019, Unknown=0, NotChecked=0, Total=2256 [2021-05-03 14:20:19,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1481 states. [2021-05-03 14:20:19,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1481 to 1280. [2021-05-03 14:20:19,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1280 states, 1279 states have (on average 3.251759186864738) internal successors, (4159), 1279 states have internal predecessors, (4159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:20:19,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1280 states to 1280 states and 4159 transitions. [2021-05-03 14:20:19,057 INFO L78 Accepts]: Start accepts. Automaton has 1280 states and 4159 transitions. Word has length 20 [2021-05-03 14:20:19,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:20:19,057 INFO L480 AbstractCegarLoop]: Abstraction has 1280 states and 4159 transitions. [2021-05-03 14:20:19,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:20:19,057 INFO L276 IsEmpty]: Start isEmpty. Operand 1280 states and 4159 transitions. [2021-05-03 14:20:19,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:20:19,058 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:20:19,058 INFO L551 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:20:19,269 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101232 [2021-05-03 14:20:19,269 INFO L428 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:20:19,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:20:19,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1408021271, now seen corresponding path program 236 times [2021-05-03 14:20:19,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:20:19,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907603577] [2021-05-03 14:20:19,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:20:19,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:20:19,421 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:20:19,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907603577] [2021-05-03 14:20:19,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591222801] [2021-05-03 14:20:19,421 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 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:20:19,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:20:19,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:20:19,442 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 14:20:19,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:20:19,985 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:20:19,986 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:20:19,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:20:20,344 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:20:20,971 WARN L205 SmtUtils]: Spent 562.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-05-03 14:20:20,972 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-05-03 14:20:20,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-05-03 14:20:22,419 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 942 DAG size of output: 813 [2021-05-03 14:20:22,664 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 788 DAG size of output: 1068 [2021-05-03 14:20:24,063 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 1775 DAG size of output: 1071 [2021-05-03 14:20:24,185 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 1775 DAG size of output: 1071 [2021-05-03 14:20:24,302 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 1779 DAG size of output: 943 [2021-05-03 14:20:25,586 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:20:26,028 WARN L205 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-05-03 14:20:26,028 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-05-03 14:20:26,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-05-03 14:20:27,564 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-05-03 14:20:27,881 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:20:27,882 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:20:27,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:20:28,889 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-05-03 14:20:28,913 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-05-03 14:20:28,914 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:20:28,914 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-05-03 14:20:28,951 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:20:28,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:20:28,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-05-03 14:20:28,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904027571] [2021-05-03 14:20:28,951 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 14:20:28,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:20:28,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 14:20:28,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=629, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:20:28,952 INFO L87 Difference]: Start difference. First operand 1280 states and 4159 transitions. Second operand has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:20:29,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:20:29,759 INFO L93 Difference]: Finished difference Result 1400 states and 4433 transitions. [2021-05-03 14:20:29,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 14:20:29,760 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:20:29,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:20:29,761 INFO L225 Difference]: With dead ends: 1400 [2021-05-03 14:20:29,761 INFO L226 Difference]: Without dead ends: 1395 [2021-05-03 14:20:29,762 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 801.0ms TimeCoverageRelationStatistics Valid=184, Invalid=1456, Unknown=0, NotChecked=0, Total=1640 [2021-05-03 14:20:29,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1395 states. [2021-05-03 14:20:29,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1395 to 1280. [2021-05-03 14:20:29,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1280 states, 1279 states have (on average 3.251759186864738) internal successors, (4159), 1279 states have internal predecessors, (4159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:20:29,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1280 states to 1280 states and 4159 transitions. [2021-05-03 14:20:29,775 INFO L78 Accepts]: Start accepts. Automaton has 1280 states and 4159 transitions. Word has length 20 [2021-05-03 14:20:29,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:20:29,775 INFO L480 AbstractCegarLoop]: Abstraction has 1280 states and 4159 transitions. [2021-05-03 14:20:29,775 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:20:29,775 INFO L276 IsEmpty]: Start isEmpty. Operand 1280 states and 4159 transitions. [2021-05-03 14:20:29,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:20:29,776 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:20:29,776 INFO L551 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:20:29,976 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104968 [2021-05-03 14:20:29,977 INFO L428 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:20:29,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:20:29,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1792854437, now seen corresponding path program 237 times [2021-05-03 14:20:29,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:20:29,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976547130] [2021-05-03 14:20:29,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:20:29,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:20:30,122 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:20:30,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976547130] [2021-05-03 14:20:30,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001564425] [2021-05-03 14:20:30,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:20:30,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 14:20:30,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:20:30,142 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 14:20:30,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:20:31,457 WARN L205 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 8262 DAG size of output: 53 [2021-05-03 14:20:31,786 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:20:31,787 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:20:31,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:20:32,439 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:20:33,055 WARN L205 SmtUtils]: Spent 552.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-05-03 14:20:33,056 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-05-03 14:20:33,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-05-03 14:20:37,177 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 1012 DAG size of output: 732 [2021-05-03 14:20:37,308 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 1107 DAG size of output: 821 [2021-05-03 14:20:37,486 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 1469 DAG size of output: 1069 [2021-05-03 14:20:37,669 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 1469 DAG size of output: 1069 [2021-05-03 14:20:37,857 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 1474 DAG size of output: 1070 [2021-05-03 14:20:38,072 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 1072 DAG size of output: 1107 [2021-05-03 14:20:39,799 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:20:40,325 WARN L205 SmtUtils]: Spent 474.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-05-03 14:20:40,326 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-05-03 14:20:40,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-05-03 14:20:43,636 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-05-03 14:20:43,950 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:20:43,951 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:20:43,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:20:45,562 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-05-03 14:20:45,586 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-05-03 14:20:45,587 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:20:45,587 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-05-03 14:20:45,627 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:20:45,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:20:45,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-05-03 14:20:45,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157297410] [2021-05-03 14:20:45,627 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 14:20:45,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:20:45,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 14:20:45,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=629, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:20:45,628 INFO L87 Difference]: Start difference. First operand 1280 states and 4159 transitions. Second operand has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:20:46,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:20:46,714 INFO L93 Difference]: Finished difference Result 1426 states and 4499 transitions. [2021-05-03 14:20:46,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 14:20:46,714 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:20:46,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:20:46,716 INFO L225 Difference]: With dead ends: 1426 [2021-05-03 14:20:46,716 INFO L226 Difference]: Without dead ends: 1421 [2021-05-03 14:20:46,716 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 968.5ms TimeCoverageRelationStatistics Valid=211, Invalid=1511, Unknown=0, NotChecked=0, Total=1722 [2021-05-03 14:20:46,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1421 states. [2021-05-03 14:20:46,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1421 to 1280. [2021-05-03 14:20:46,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1280 states, 1279 states have (on average 3.251759186864738) internal successors, (4159), 1279 states have internal predecessors, (4159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:20:46,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1280 states to 1280 states and 4159 transitions. [2021-05-03 14:20:46,731 INFO L78 Accepts]: Start accepts. Automaton has 1280 states and 4159 transitions. Word has length 20 [2021-05-03 14:20:46,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:20:46,731 INFO L480 AbstractCegarLoop]: Abstraction has 1280 states and 4159 transitions. [2021-05-03 14:20:46,731 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:20:46,731 INFO L276 IsEmpty]: Start isEmpty. Operand 1280 states and 4159 transitions. [2021-05-03 14:20:46,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:20:46,733 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:20:46,733 INFO L551 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:20:46,946 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106673 [2021-05-03 14:20:46,947 INFO L428 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:20:46,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:20:46,947 INFO L82 PathProgramCache]: Analyzing trace with hash 2059213719, now seen corresponding path program 238 times [2021-05-03 14:20:46,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:20:46,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166396640] [2021-05-03 14:20:46,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:20:46,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:20:47,105 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:20:47,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166396640] [2021-05-03 14:20:47,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322425215] [2021-05-03 14:20:47,105 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 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:20:47,131 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:20:47,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:20:47,132 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 14:20:47,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:20:48,010 INFO L244 Elim1Store]: Index analysis took 270 ms [2021-05-03 14:20:48,172 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:20:48,172 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:20:48,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:20:48,805 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:20:49,442 WARN L205 SmtUtils]: Spent 576.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-05-03 14:20:49,442 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-05-03 14:20:49,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-05-03 14:20:52,575 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 1687 DAG size of output: 1082 [2021-05-03 14:20:52,693 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 1687 DAG size of output: 1082 [2021-05-03 14:20:52,827 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 1695 DAG size of output: 1081 [2021-05-03 14:20:55,313 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:20:55,780 WARN L205 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-05-03 14:20:55,780 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-05-03 14:20:55,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-05-03 14:20:58,498 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-05-03 14:20:58,803 WARN L205 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:20:58,804 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:20:58,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:20:59,462 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-05-03 14:20:59,487 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-05-03 14:20:59,487 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:20:59,487 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-05-03 14:20:59,524 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:20:59,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:20:59,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-05-03 14:20:59,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760957046] [2021-05-03 14:20:59,524 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 14:20:59,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:20:59,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 14:20:59,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=629, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:20:59,525 INFO L87 Difference]: Start difference. First operand 1280 states and 4159 transitions. Second operand has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:21:00,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:21:00,399 INFO L93 Difference]: Finished difference Result 1422 states and 4493 transitions. [2021-05-03 14:21:00,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 14:21:00,400 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:21:00,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:21:00,402 INFO L225 Difference]: With dead ends: 1422 [2021-05-03 14:21:00,402 INFO L226 Difference]: Without dead ends: 1417 [2021-05-03 14:21:00,402 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 1074.9ms TimeCoverageRelationStatistics Valid=200, Invalid=1440, Unknown=0, NotChecked=0, Total=1640 [2021-05-03 14:21:00,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1417 states. [2021-05-03 14:21:00,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1417 to 1280. [2021-05-03 14:21:00,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1280 states, 1279 states have (on average 3.251759186864738) internal successors, (4159), 1279 states have internal predecessors, (4159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:21:00,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1280 states to 1280 states and 4159 transitions. [2021-05-03 14:21:00,416 INFO L78 Accepts]: Start accepts. Automaton has 1280 states and 4159 transitions. Word has length 20 [2021-05-03 14:21:00,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:21:00,416 INFO L480 AbstractCegarLoop]: Abstraction has 1280 states and 4159 transitions. [2021-05-03 14:21:00,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:21:00,416 INFO L276 IsEmpty]: Start isEmpty. Operand 1280 states and 4159 transitions. [2021-05-03 14:21:00,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:21:00,418 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:21:00,418 INFO L551 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:21:00,620 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109086 [2021-05-03 14:21:00,621 INFO L428 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:21:00,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:21:00,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1304818541, now seen corresponding path program 239 times [2021-05-03 14:21:00,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:21:00,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226035224] [2021-05-03 14:21:00,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:21:00,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:21:00,736 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:21:00,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226035224] [2021-05-03 14:21:00,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459892101] [2021-05-03 14:21:00,737 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:21:00,757 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 14:21:00,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:21:00,758 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 14:21:00,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:21:01,185 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:21:01,186 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:21:01,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:21:01,551 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:21:01,552 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:21:01,553 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:21:01,553 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-05-03 14:21:01,559 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:21:01,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:21:01,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-05-03 14:21:01,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711046138] [2021-05-03 14:21:01,560 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 14:21:01,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:21:01,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 14:21:01,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:21:01,560 INFO L87 Difference]: Start difference. First operand 1280 states and 4159 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:21:02,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:21:02,050 INFO L93 Difference]: Finished difference Result 1319 states and 4221 transitions. [2021-05-03 14:21:02,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 14:21:02,052 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:21:02,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:21:02,054 INFO L225 Difference]: With dead ends: 1319 [2021-05-03 14:21:02,054 INFO L226 Difference]: Without dead ends: 1301 [2021-05-03 14:21:02,054 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 432.8ms TimeCoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:21:02,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1301 states. [2021-05-03 14:21:02,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1301 to 1280. [2021-05-03 14:21:02,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1280 states, 1279 states have (on average 3.250195465207193) internal successors, (4157), 1279 states have internal predecessors, (4157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:21:02,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1280 states to 1280 states and 4157 transitions. [2021-05-03 14:21:02,071 INFO L78 Accepts]: Start accepts. Automaton has 1280 states and 4157 transitions. Word has length 20 [2021-05-03 14:21:02,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:21:02,071 INFO L480 AbstractCegarLoop]: Abstraction has 1280 states and 4157 transitions. [2021-05-03 14:21:02,071 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:21:02,071 INFO L276 IsEmpty]: Start isEmpty. Operand 1280 states and 4157 transitions. [2021-05-03 14:21:02,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:21:02,072 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:21:02,073 INFO L551 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:21:02,276 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111433 [2021-05-03 14:21:02,276 INFO L428 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:21:02,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:21:02,277 INFO L82 PathProgramCache]: Analyzing trace with hash -323078483, now seen corresponding path program 240 times [2021-05-03 14:21:02,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:21:02,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837658577] [2021-05-03 14:21:02,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:21:02,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:21:02,400 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:21:02,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837658577] [2021-05-03 14:21:02,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646549747] [2021-05-03 14:21:02,401 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 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:21:02,420 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:21:02,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:21:02,421 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 14:21:02,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:21:02,878 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:21:02,878 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:21:02,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:21:03,568 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:21:04,159 WARN L205 SmtUtils]: Spent 535.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-05-03 14:21:04,159 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-05-03 14:21:04,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-05-03 14:21:06,474 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 1136 DAG size of output: 1021 [2021-05-03 14:21:06,637 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 1156 DAG size of output: 1041 [2021-05-03 14:21:06,771 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 1156 DAG size of output: 1041 [2021-05-03 14:21:06,923 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 1162 DAG size of output: 1046 [2021-05-03 14:21:07,046 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 1048 DAG size of output: 982 [2021-05-03 14:21:08,437 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:21:08,895 WARN L205 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-05-03 14:21:08,896 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-05-03 14:21:08,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-05-03 14:21:10,266 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-05-03 14:21:10,566 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:21:10,566 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:21:10,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:21:11,587 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-05-03 14:21:11,612 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-05-03 14:21:11,613 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:21:11,613 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-05-03 14:21:11,647 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:21:11,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:21:11,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-05-03 14:21:11,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839149507] [2021-05-03 14:21:11,647 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-03 14:21:11,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:21:11,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-03 14:21:11,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:21:11,648 INFO L87 Difference]: Start difference. First operand 1280 states and 4157 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:21:12,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:21:12,646 INFO L93 Difference]: Finished difference Result 1464 states and 4577 transitions. [2021-05-03 14:21:12,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-03 14:21:12,647 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:21:12,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:21:12,649 INFO L225 Difference]: With dead ends: 1464 [2021-05-03 14:21:12,649 INFO L226 Difference]: Without dead ends: 1454 [2021-05-03 14:21:12,649 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 857.2ms TimeCoverageRelationStatistics Valid=244, Invalid=1736, Unknown=0, NotChecked=0, Total=1980 [2021-05-03 14:21:12,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1454 states. [2021-05-03 14:21:12,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1454 to 1283. [2021-05-03 14:21:12,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1283 states, 1282 states have (on average 3.2503900156006242) internal successors, (4167), 1282 states have internal predecessors, (4167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:21:12,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1283 states to 1283 states and 4167 transitions. [2021-05-03 14:21:12,662 INFO L78 Accepts]: Start accepts. Automaton has 1283 states and 4167 transitions. Word has length 20 [2021-05-03 14:21:12,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:21:12,662 INFO L480 AbstractCegarLoop]: Abstraction has 1283 states and 4167 transitions. [2021-05-03 14:21:12,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:21:12,662 INFO L276 IsEmpty]: Start isEmpty. Operand 1283 states and 4167 transitions. [2021-05-03 14:21:12,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:21:12,663 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:21:12,663 INFO L551 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:21:12,864 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111613,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:21:12,864 INFO L428 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:21:12,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:21:12,864 INFO L82 PathProgramCache]: Analyzing trace with hash 1160056455, now seen corresponding path program 241 times [2021-05-03 14:21:12,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:21:12,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019321783] [2021-05-03 14:21:12,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:21:12,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:21:13,005 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:21:13,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019321783] [2021-05-03 14:21:13,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712930364] [2021-05-03 14:21:13,006 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 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:21:13,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:21:13,025 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 14:21:13,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:21:13,490 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:21:13,491 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:21:13,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:21:14,830 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:21:15,405 WARN L205 SmtUtils]: Spent 518.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-05-03 14:21:15,405 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-05-03 14:21:15,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-05-03 14:21:18,139 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 1245 DAG size of output: 1070 [2021-05-03 14:21:18,268 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 1305 DAG size of output: 1121 [2021-05-03 14:21:18,425 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 1305 DAG size of output: 1121 [2021-05-03 14:21:18,564 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 1315 DAG size of output: 1127 [2021-05-03 14:21:18,777 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 1129 DAG size of output: 1583 [2021-05-03 14:21:19,244 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 959 DAG size of output: 1230 [2021-05-03 14:21:21,953 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 1676 DAG size of output: 852 [2021-05-03 14:21:22,142 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 1047 DAG size of output: 1423 [2021-05-03 14:21:24,503 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 2897 DAG size of output: 1424 [2021-05-03 14:21:24,731 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 2897 DAG size of output: 1424 [2021-05-03 14:21:24,940 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 2900 DAG size of output: 1067 [2021-05-03 14:21:27,738 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:21:28,178 WARN L205 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-05-03 14:21:28,179 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-05-03 14:21:28,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-05-03 14:21:31,722 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-05-03 14:21:32,031 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:21:32,032 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:21:32,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:21:35,248 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-05-03 14:21:35,273 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-05-03 14:21:35,274 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:21:35,274 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-05-03 14:21:35,310 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:21:35,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:21:35,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-05-03 14:21:35,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646226108] [2021-05-03 14:21:35,311 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 14:21:35,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:21:35,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 14:21:35,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:21:35,311 INFO L87 Difference]: Start difference. First operand 1283 states and 4167 transitions. Second operand has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:21:36,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:21:36,476 INFO L93 Difference]: Finished difference Result 1576 states and 4870 transitions. [2021-05-03 14:21:36,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-03 14:21:36,477 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:21:36,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:21:36,479 INFO L225 Difference]: With dead ends: 1576 [2021-05-03 14:21:36,479 INFO L226 Difference]: Without dead ends: 1547 [2021-05-03 14:21:36,479 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 592 ImplicationChecksByTransitivity, 1062.2ms TimeCoverageRelationStatistics Valid=303, Invalid=2147, Unknown=0, NotChecked=0, Total=2450 [2021-05-03 14:21:36,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1547 states. [2021-05-03 14:21:36,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1547 to 1268. [2021-05-03 14:21:36,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1268 states, 1267 states have (on average 3.2478295185477504) internal successors, (4115), 1267 states have internal predecessors, (4115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:21:36,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1268 states to 1268 states and 4115 transitions. [2021-05-03 14:21:36,493 INFO L78 Accepts]: Start accepts. Automaton has 1268 states and 4115 transitions. Word has length 20 [2021-05-03 14:21:36,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:21:36,493 INFO L480 AbstractCegarLoop]: Abstraction has 1268 states and 4115 transitions. [2021-05-03 14:21:36,493 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:21:36,493 INFO L276 IsEmpty]: Start isEmpty. Operand 1268 states and 4115 transitions. [2021-05-03 14:21:36,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:21:36,494 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:21:36,494 INFO L551 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:21:36,695 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113509,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:21:36,695 INFO L428 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:21:36,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:21:36,695 INFO L82 PathProgramCache]: Analyzing trace with hash -2040819253, now seen corresponding path program 242 times [2021-05-03 14:21:36,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:21:36,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839971221] [2021-05-03 14:21:36,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:21:36,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:21:36,836 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:21:36,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839971221] [2021-05-03 14:21:36,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241858696] [2021-05-03 14:21:36,837 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 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:21:36,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:21:36,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:21:36,861 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 14:21:36,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:21:37,379 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:21:37,380 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:21:37,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:21:37,841 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:21:38,473 WARN L205 SmtUtils]: Spent 572.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-05-03 14:21:38,474 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-05-03 14:21:38,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-05-03 14:21:42,639 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 1252 DAG size of output: 976 [2021-05-03 14:21:42,756 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 978 DAG size of output: 1169 [2021-05-03 14:21:44,016 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:21:44,482 WARN L205 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-05-03 14:21:44,483 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-05-03 14:21:44,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-05-03 14:21:45,543 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-05-03 14:21:45,868 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:21:45,869 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:21:45,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:21:46,446 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-05-03 14:21:46,470 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-05-03 14:21:46,471 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:21:46,471 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-05-03 14:21:46,512 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:21:46,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:21:46,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-05-03 14:21:46,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684748364] [2021-05-03 14:21:46,513 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 14:21:46,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:21:46,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 14:21:46,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:21:46,513 INFO L87 Difference]: Start difference. First operand 1268 states and 4115 transitions. Second operand has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:21:47,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:21:47,463 INFO L93 Difference]: Finished difference Result 1447 states and 4528 transitions. [2021-05-03 14:21:47,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 14:21:47,464 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:21:47,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:21:47,466 INFO L225 Difference]: With dead ends: 1447 [2021-05-03 14:21:47,466 INFO L226 Difference]: Without dead ends: 1437 [2021-05-03 14:21:47,466 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 959.8ms TimeCoverageRelationStatistics Valid=234, Invalid=1658, Unknown=0, NotChecked=0, Total=1892 [2021-05-03 14:21:47,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1437 states. [2021-05-03 14:21:47,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1437 to 1270. [2021-05-03 14:21:47,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1270 states, 1269 states have (on average 3.2474389282899923) internal successors, (4121), 1269 states have internal predecessors, (4121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:21:47,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1270 states to 1270 states and 4121 transitions. [2021-05-03 14:21:47,479 INFO L78 Accepts]: Start accepts. Automaton has 1270 states and 4121 transitions. Word has length 20 [2021-05-03 14:21:47,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:21:47,480 INFO L480 AbstractCegarLoop]: Abstraction has 1270 states and 4121 transitions. [2021-05-03 14:21:47,480 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:21:47,480 INFO L276 IsEmpty]: Start isEmpty. Operand 1270 states and 4121 transitions. [2021-05-03 14:21:47,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:21:47,481 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:21:47,481 INFO L551 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:21:47,682 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119159,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:21:47,682 INFO L428 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:21:47,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:21:47,682 INFO L82 PathProgramCache]: Analyzing trace with hash -107400723, now seen corresponding path program 243 times [2021-05-03 14:21:47,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:21:47,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23075647] [2021-05-03 14:21:47,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:21:47,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:21:47,828 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:21:47,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23075647] [2021-05-03 14:21:47,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737576988] [2021-05-03 14:21:47,829 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 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:21:47,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 14:21:47,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:21:47,867 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 14:21:47,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:21:48,385 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:21:48,386 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:21:48,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:21:48,970 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:21:49,594 WARN L205 SmtUtils]: Spent 564.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-05-03 14:21:49,595 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-05-03 14:21:49,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-05-03 14:21:53,220 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 632 DAG size of output: 766 [2021-05-03 14:21:54,652 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:21:55,123 WARN L205 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-05-03 14:21:55,124 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-05-03 14:21:55,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-05-03 14:21:57,032 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-05-03 14:21:57,359 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:21:57,359 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:21:57,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:21:57,891 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-05-03 14:21:57,918 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-05-03 14:21:57,919 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:21:57,919 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-05-03 14:21:57,961 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:21:57,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:21:57,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-05-03 14:21:57,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594525542] [2021-05-03 14:21:57,963 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 14:21:57,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:21:57,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 14:21:57,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:21:57,963 INFO L87 Difference]: Start difference. First operand 1270 states and 4121 transitions. Second operand has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:21:59,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:21:59,309 INFO L93 Difference]: Finished difference Result 1547 states and 4754 transitions. [2021-05-03 14:21:59,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-03 14:21:59,310 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:21:59,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:21:59,312 INFO L225 Difference]: With dead ends: 1547 [2021-05-03 14:21:59,312 INFO L226 Difference]: Without dead ends: 1525 [2021-05-03 14:21:59,312 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 757 ImplicationChecksByTransitivity, 1173.1ms TimeCoverageRelationStatistics Valid=334, Invalid=2636, Unknown=0, NotChecked=0, Total=2970 [2021-05-03 14:21:59,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1525 states. [2021-05-03 14:21:59,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1525 to 1272. [2021-05-03 14:21:59,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1272 states, 1271 states have (on average 3.2439024390243905) internal successors, (4123), 1271 states have internal predecessors, (4123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:21:59,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1272 states to 1272 states and 4123 transitions. [2021-05-03 14:21:59,326 INFO L78 Accepts]: Start accepts. Automaton has 1272 states and 4123 transitions. Word has length 20 [2021-05-03 14:21:59,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:21:59,326 INFO L480 AbstractCegarLoop]: Abstraction has 1272 states and 4123 transitions. [2021-05-03 14:21:59,326 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:21:59,326 INFO L276 IsEmpty]: Start isEmpty. Operand 1272 states and 4123 transitions. [2021-05-03 14:21:59,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:21:59,327 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:21:59,327 INFO L551 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:21:59,529 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable121030 [2021-05-03 14:21:59,529 INFO L428 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:21:59,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:21:59,530 INFO L82 PathProgramCache]: Analyzing trace with hash 986690865, now seen corresponding path program 244 times [2021-05-03 14:21:59,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:21:59,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899953849] [2021-05-03 14:21:59,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:21:59,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:21:59,680 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:21:59,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899953849] [2021-05-03 14:21:59,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231943252] [2021-05-03 14:21:59,681 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 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:21:59,699 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:21:59,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:21:59,700 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 14:21:59,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:22:00,248 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:22:00,248 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:22:00,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:22:01,726 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:22:02,356 WARN L205 SmtUtils]: Spent 567.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-05-03 14:22:02,357 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-05-03 14:22:02,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-05-03 14:22:04,538 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:22:05,006 WARN L205 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-05-03 14:22:05,006 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-05-03 14:22:05,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-05-03 14:22:06,027 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-05-03 14:22:06,369 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:22:06,370 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:22:06,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:22:06,849 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-05-03 14:22:06,879 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-05-03 14:22:06,880 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:22:06,880 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-05-03 14:22:06,923 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:22:06,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:22:06,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-05-03 14:22:06,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901925147] [2021-05-03 14:22:06,923 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 14:22:06,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:22:06,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 14:22:06,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:22:06,924 INFO L87 Difference]: Start difference. First operand 1272 states and 4123 transitions. Second operand has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:22:07,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:22:07,978 INFO L93 Difference]: Finished difference Result 1416 states and 4454 transitions. [2021-05-03 14:22:07,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 14:22:07,979 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:22:07,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:22:07,981 INFO L225 Difference]: With dead ends: 1416 [2021-05-03 14:22:07,981 INFO L226 Difference]: Without dead ends: 1411 [2021-05-03 14:22:07,981 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 991.1ms TimeCoverageRelationStatistics Valid=222, Invalid=1584, Unknown=0, NotChecked=0, Total=1806 [2021-05-03 14:22:07,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1411 states. [2021-05-03 14:22:07,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1411 to 1272. [2021-05-03 14:22:07,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1272 states, 1271 states have (on average 3.2439024390243905) internal successors, (4123), 1271 states have internal predecessors, (4123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:22:07,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1272 states to 1272 states and 4123 transitions. [2021-05-03 14:22:07,995 INFO L78 Accepts]: Start accepts. Automaton has 1272 states and 4123 transitions. Word has length 20 [2021-05-03 14:22:07,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:22:07,995 INFO L480 AbstractCegarLoop]: Abstraction has 1272 states and 4123 transitions. [2021-05-03 14:22:07,995 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:22:07,995 INFO L276 IsEmpty]: Start isEmpty. Operand 1272 states and 4123 transitions. [2021-05-03 14:22:07,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:22:07,996 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:22:07,996 INFO L551 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:22:08,197 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123127 [2021-05-03 14:22:08,198 INFO L428 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:22:08,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:22:08,198 INFO L82 PathProgramCache]: Analyzing trace with hash 543791725, now seen corresponding path program 245 times [2021-05-03 14:22:08,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:22:08,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996889512] [2021-05-03 14:22:08,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:22:08,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:22:08,348 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:22:08,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996889512] [2021-05-03 14:22:08,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042838176] [2021-05-03 14:22:08,348 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 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:22:08,368 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 14:22:08,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:22:08,369 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 14:22:08,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:22:08,941 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:22:08,941 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:22:08,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:22:09,363 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:22:10,004 WARN L205 SmtUtils]: Spent 585.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-05-03 14:22:10,005 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-05-03 14:22:10,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-05-03 14:22:13,812 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 1165 DAG size of output: 685 [2021-05-03 14:22:16,056 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 2109 DAG size of output: 985 [2021-05-03 14:22:16,262 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 2124 DAG size of output: 999 [2021-05-03 14:22:16,547 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 2399 DAG size of output: 1247 [2021-05-03 14:22:16,785 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 2399 DAG size of output: 1247 [2021-05-03 14:22:17,040 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 2404 DAG size of output: 1233 [2021-05-03 14:22:17,230 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 1235 DAG size of output: 1086 [2021-05-03 14:22:17,363 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 947 DAG size of output: 935 [2021-05-03 14:22:17,538 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 924 DAG size of output: 1004 [2021-05-03 14:22:17,652 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 915 [2021-05-03 14:22:17,764 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 904 DAG size of output: 904 [2021-05-03 14:22:20,252 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 993 DAG size of output: 679 [2021-05-03 14:22:20,467 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 626 DAG size of output: 845 [2021-05-03 14:22:22,604 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:22:23,100 WARN L205 SmtUtils]: Spent 443.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-05-03 14:22:23,101 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-05-03 14:22:23,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-05-03 14:22:25,623 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-05-03 14:22:25,974 WARN L205 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:22:25,974 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:22:25,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:22:26,804 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-05-03 14:22:26,828 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-05-03 14:22:26,829 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:22:26,829 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-05-03 14:22:26,867 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:22:26,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:22:26,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-05-03 14:22:26,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236680996] [2021-05-03 14:22:26,868 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 14:22:26,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:22:26,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 14:22:26,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:22:26,868 INFO L87 Difference]: Start difference. First operand 1272 states and 4123 transitions. Second operand has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:22:27,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:22:27,947 INFO L93 Difference]: Finished difference Result 1406 states and 4439 transitions. [2021-05-03 14:22:27,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 14:22:27,948 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:22:27,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:22:27,950 INFO L225 Difference]: With dead ends: 1406 [2021-05-03 14:22:27,950 INFO L226 Difference]: Without dead ends: 1401 [2021-05-03 14:22:27,950 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 1081.1ms TimeCoverageRelationStatistics Valid=226, Invalid=1580, Unknown=0, NotChecked=0, Total=1806 [2021-05-03 14:22:27,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1401 states. [2021-05-03 14:22:27,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1401 to 1272. [2021-05-03 14:22:27,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1272 states, 1271 states have (on average 3.2439024390243905) internal successors, (4123), 1271 states have internal predecessors, (4123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:22:27,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1272 states to 1272 states and 4123 transitions. [2021-05-03 14:22:27,964 INFO L78 Accepts]: Start accepts. Automaton has 1272 states and 4123 transitions. Word has length 20 [2021-05-03 14:22:27,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:22:27,964 INFO L480 AbstractCegarLoop]: Abstraction has 1272 states and 4123 transitions. [2021-05-03 14:22:27,964 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:22:27,964 INFO L276 IsEmpty]: Start isEmpty. Operand 1272 states and 4123 transitions. [2021-05-03 14:22:27,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:22:27,965 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:22:27,965 INFO L551 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:22:28,166 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124646 [2021-05-03 14:22:28,166 INFO L428 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:22:28,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:22:28,166 INFO L82 PathProgramCache]: Analyzing trace with hash 565292265, now seen corresponding path program 246 times [2021-05-03 14:22:28,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:22:28,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951377512] [2021-05-03 14:22:28,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:22:28,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:22:28,342 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:22:28,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951377512] [2021-05-03 14:22:28,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637091096] [2021-05-03 14:22:28,342 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 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:22:28,362 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:22:28,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:22:28,363 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 14:22:28,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:22:28,848 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:22:28,848 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:22:28,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:22:29,459 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:22:29,461 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:22:29,462 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:22:29,462 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-05-03 14:22:29,469 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:22:29,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:22:29,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-05-03 14:22:29,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259719855] [2021-05-03 14:22:29,469 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-03 14:22:29,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:22:29,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-03 14:22:29,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:22:29,470 INFO L87 Difference]: Start difference. First operand 1272 states and 4123 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:22:30,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:22:30,230 INFO L93 Difference]: Finished difference Result 1464 states and 4684 transitions. [2021-05-03 14:22:30,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:22:30,231 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:22:30,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:22:30,233 INFO L225 Difference]: With dead ends: 1464 [2021-05-03 14:22:30,233 INFO L226 Difference]: Without dead ends: 1448 [2021-05-03 14:22:30,233 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 504.7ms TimeCoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:22:30,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1448 states. [2021-05-03 14:22:30,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1448 to 1417. [2021-05-03 14:22:30,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1417 states, 1416 states have (on average 3.246468926553672) internal successors, (4597), 1416 states have internal predecessors, (4597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:22:30,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1417 states to 1417 states and 4597 transitions. [2021-05-03 14:22:30,248 INFO L78 Accepts]: Start accepts. Automaton has 1417 states and 4597 transitions. Word has length 20 [2021-05-03 14:22:30,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:22:30,248 INFO L480 AbstractCegarLoop]: Abstraction has 1417 states and 4597 transitions. [2021-05-03 14:22:30,248 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:22:30,248 INFO L276 IsEmpty]: Start isEmpty. Operand 1417 states and 4597 transitions. [2021-05-03 14:22:30,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:22:30,249 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:22:30,249 INFO L551 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:22:30,450 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 260 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127832 [2021-05-03 14:22:30,450 INFO L428 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:22:30,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:22:30,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1424166795, now seen corresponding path program 247 times [2021-05-03 14:22:30,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:22:30,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30250673] [2021-05-03 14:22:30,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:22:30,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:22:30,592 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:22:30,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30250673] [2021-05-03 14:22:30,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569349475] [2021-05-03 14:22:30,592 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 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:22:30,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:22:30,610 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 14:22:30,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:22:31,096 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:22:31,096 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:22:31,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:22:31,695 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:22:32,361 WARN L205 SmtUtils]: Spent 599.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-05-03 14:22:32,362 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-05-03 14:22:32,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-05-03 14:22:35,437 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 1173 DAG size of output: 698 [2021-05-03 14:22:35,592 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 1173 DAG size of output: 698 [2021-05-03 14:22:35,732 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 1179 DAG size of output: 623 [2021-05-03 14:22:35,856 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 625 DAG size of output: 791 [2021-05-03 14:22:39,701 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 1176 DAG size of output: 822 [2021-05-03 14:22:39,911 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 2009 DAG size of output: 1455 [2021-05-03 14:22:40,339 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 2107 DAG size of output: 1547 [2021-05-03 14:22:43,566 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 1253 DAG size of output: 884 [2021-05-03 14:22:43,733 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 1664 DAG size of output: 1209 [2021-05-03 14:22:44,186 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 1776 DAG size of output: 1324 [2021-05-03 14:22:44,683 WARN L205 SmtUtils]: Spent 483.00 ms on a formula simplification. DAG size of input: 3476 DAG size of output: 2570 [2021-05-03 14:22:45,149 WARN L205 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 3476 DAG size of output: 2570 [2021-05-03 14:22:45,583 WARN L205 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 3481 DAG size of output: 2066 [2021-05-03 14:22:45,842 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 2066 DAG size of output: 1808 [2021-05-03 14:22:45,972 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 1098 DAG size of output: 1094 [2021-05-03 14:22:47,413 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 1822 DAG size of output: 1199 [2021-05-03 14:22:47,560 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 1822 DAG size of output: 1199 [2021-05-03 14:22:47,717 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 1825 DAG size of output: 1138 [2021-05-03 14:22:47,835 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 1140 DAG size of output: 867 [2021-05-03 14:22:48,356 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:22:48,827 WARN L205 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-05-03 14:22:48,827 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-05-03 14:22:48,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-05-03 14:22:50,530 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-05-03 14:22:50,889 WARN L205 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:22:50,890 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:22:50,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:22:52,166 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-05-03 14:22:52,194 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-05-03 14:22:52,195 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:22:52,195 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-05-03 14:22:52,239 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:22:52,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:22:52,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-05-03 14:22:52,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767392503] [2021-05-03 14:22:52,239 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-03 14:22:52,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:22:52,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-03 14:22:52,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:22:52,239 INFO L87 Difference]: Start difference. First operand 1417 states and 4597 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:22:53,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:22:53,835 INFO L93 Difference]: Finished difference Result 1563 states and 4937 transitions. [2021-05-03 14:22:53,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-03 14:22:53,836 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:22:53,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:22:53,838 INFO L225 Difference]: With dead ends: 1563 [2021-05-03 14:22:53,838 INFO L226 Difference]: Without dead ends: 1553 [2021-05-03 14:22:53,838 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 1022.8ms TimeCoverageRelationStatistics Valid=236, Invalid=2214, Unknown=0, NotChecked=0, Total=2450 [2021-05-03 14:22:53,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1553 states. [2021-05-03 14:22:53,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1553 to 1421. [2021-05-03 14:22:53,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1421 states, 1420 states have (on average 3.2485915492957744) internal successors, (4613), 1420 states have internal predecessors, (4613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:22:53,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1421 states to 1421 states and 4613 transitions. [2021-05-03 14:22:53,854 INFO L78 Accepts]: Start accepts. Automaton has 1421 states and 4613 transitions. Word has length 20 [2021-05-03 14:22:53,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:22:53,854 INFO L480 AbstractCegarLoop]: Abstraction has 1421 states and 4613 transitions. [2021-05-03 14:22:53,854 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:22:53,854 INFO L276 IsEmpty]: Start isEmpty. Operand 1421 states and 4613 transitions. [2021-05-03 14:22:53,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:22:53,856 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:22:53,856 INFO L551 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:22:54,056 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128087,261 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:22:54,056 INFO L428 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:22:54,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:22:54,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1160187193, now seen corresponding path program 248 times [2021-05-03 14:22:54,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:22:54,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955569118] [2021-05-03 14:22:54,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:22:54,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:22:54,208 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:22:54,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955569118] [2021-05-03 14:22:54,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022138991] [2021-05-03 14:22:54,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:22:54,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:22:54,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:22:54,227 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 14:22:54,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:22:54,751 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:22:54,751 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:22:54,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:22:55,921 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:22:56,633 WARN L205 SmtUtils]: Spent 643.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-05-03 14:22:56,634 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-05-03 14:22:56,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-05-03 14:23:01,212 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 1345 DAG size of output: 1054 [2021-05-03 14:23:01,340 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 1446 DAG size of output: 1102 [2021-05-03 14:23:01,490 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 1626 DAG size of output: 1194 [2021-05-03 14:23:01,641 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 1626 DAG size of output: 1194 [2021-05-03 14:23:01,825 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 1633 DAG size of output: 1085 [2021-05-03 14:23:01,988 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 1087 DAG size of output: 1001 [2021-05-03 14:23:02,183 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 927 DAG size of output: 853 [2021-05-03 14:23:02,299 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 824 DAG size of output: 782 [2021-05-03 14:23:04,695 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:23:05,219 WARN L205 SmtUtils]: Spent 464.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-05-03 14:23:05,219 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-05-03 14:23:05,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-05-03 14:23:06,728 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-05-03 14:23:07,086 WARN L205 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:23:07,086 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:23:07,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:23:09,656 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-05-03 14:23:09,686 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-05-03 14:23:09,687 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:23:09,687 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-05-03 14:23:09,732 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:23:09,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:23:09,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-05-03 14:23:09,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358632419] [2021-05-03 14:23:09,733 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-03 14:23:09,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:23:09,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-03 14:23:09,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:23:09,733 INFO L87 Difference]: Start difference. First operand 1421 states and 4613 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:23:11,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:23:11,155 INFO L93 Difference]: Finished difference Result 1609 states and 5093 transitions. [2021-05-03 14:23:11,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-03 14:23:11,156 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:23:11,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:23:11,158 INFO L225 Difference]: With dead ends: 1609 [2021-05-03 14:23:11,158 INFO L226 Difference]: Without dead ends: 1599 [2021-05-03 14:23:11,159 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 906.7ms TimeCoverageRelationStatistics Valid=183, Invalid=1709, Unknown=0, NotChecked=0, Total=1892 [2021-05-03 14:23:11,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1599 states. [2021-05-03 14:23:11,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1599 to 1473. [2021-05-03 14:23:11,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1473 states, 1472 states have (on average 3.249320652173913) internal successors, (4783), 1472 states have internal predecessors, (4783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:23:11,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1473 states to 1473 states and 4783 transitions. [2021-05-03 14:23:11,175 INFO L78 Accepts]: Start accepts. Automaton has 1473 states and 4783 transitions. Word has length 20 [2021-05-03 14:23:11,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:23:11,175 INFO L480 AbstractCegarLoop]: Abstraction has 1473 states and 4783 transitions. [2021-05-03 14:23:11,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:23:11,175 INFO L276 IsEmpty]: Start isEmpty. Operand 1473 states and 4783 transitions. [2021-05-03 14:23:11,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:23:11,176 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:23:11,176 INFO L551 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:23:11,377 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132035,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:23:11,377 INFO L428 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:23:11,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:23:11,377 INFO L82 PathProgramCache]: Analyzing trace with hash 329217803, now seen corresponding path program 249 times [2021-05-03 14:23:11,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:23:11,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890901868] [2021-05-03 14:23:11,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:23:11,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:23:11,518 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:23:11,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890901868] [2021-05-03 14:23:11,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689310435] [2021-05-03 14:23:11,518 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 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:23:11,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 14:23:11,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:23:11,539 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 14:23:11,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:23:12,124 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:23:12,124 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:23:12,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:23:13,397 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:23:14,108 WARN L205 SmtUtils]: Spent 634.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-05-03 14:23:14,109 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-05-03 14:23:14,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-05-03 14:23:19,779 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 1520 DAG size of output: 1087 [2021-05-03 14:23:19,926 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 1520 DAG size of output: 1087 [2021-05-03 14:23:20,088 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 1527 DAG size of output: 1017 [2021-05-03 14:23:20,231 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 1019 DAG size of output: 1055 [2021-05-03 14:23:22,411 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 1311 DAG size of output: 779 [2021-05-03 14:23:23,652 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:23:24,271 WARN L205 SmtUtils]: Spent 536.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-05-03 14:23:24,271 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-05-03 14:23:24,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-05-03 14:23:28,459 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 2105 DAG size of output: 1321 [2021-05-03 14:23:31,037 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 3412 DAG size of output: 1801 [2021-05-03 14:23:31,256 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 3535 DAG size of output: 1823 [2021-05-03 14:23:31,548 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 4076 DAG size of output: 2136 [2021-05-03 14:23:31,805 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 4076 DAG size of output: 2136 [2021-05-03 14:23:32,086 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 4081 DAG size of output: 1808 [2021-05-03 14:23:32,312 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 1810 DAG size of output: 1709 [2021-05-03 14:23:32,455 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 1194 DAG size of output: 1279 [2021-05-03 14:23:33,641 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 1481 DAG size of output: 1053 [2021-05-03 14:23:34,967 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 2140 DAG size of output: 1243 [2021-05-03 14:23:35,133 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 2140 DAG size of output: 1243 [2021-05-03 14:23:35,277 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 2143 DAG size of output: 859 [2021-05-03 14:23:36,466 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-05-03 14:23:36,889 WARN L205 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:23:36,889 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:23:36,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:23:38,164 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-05-03 14:23:38,195 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-05-03 14:23:38,196 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:23:38,196 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-05-03 14:23:38,243 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:23:38,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:23:38,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-05-03 14:23:38,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116987878] [2021-05-03 14:23:38,243 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-03 14:23:38,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:23:38,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-03 14:23:38,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=580, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:23:38,244 INFO L87 Difference]: Start difference. First operand 1473 states and 4783 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:23:39,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:23:39,493 INFO L93 Difference]: Finished difference Result 1674 states and 5244 transitions. [2021-05-03 14:23:39,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-03 14:23:39,494 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:23:39,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:23:39,496 INFO L225 Difference]: With dead ends: 1674 [2021-05-03 14:23:39,496 INFO L226 Difference]: Without dead ends: 1664 [2021-05-03 14:23:39,496 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 1018.7ms TimeCoverageRelationStatistics Valid=210, Invalid=1770, Unknown=0, NotChecked=0, Total=1980 [2021-05-03 14:23:39,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1664 states. [2021-05-03 14:23:39,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1664 to 1488. [2021-05-03 14:23:39,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1488 states, 1487 states have (on average 3.2508406186953596) internal successors, (4834), 1487 states have internal predecessors, (4834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:23:39,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1488 states to 1488 states and 4834 transitions. [2021-05-03 14:23:39,513 INFO L78 Accepts]: Start accepts. Automaton has 1488 states and 4834 transitions. Word has length 20 [2021-05-03 14:23:39,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:23:39,513 INFO L480 AbstractCegarLoop]: Abstraction has 1488 states and 4834 transitions. [2021-05-03 14:23:39,513 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:23:39,513 INFO L276 IsEmpty]: Start isEmpty. Operand 1488 states and 4834 transitions. [2021-05-03 14:23:39,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:23:39,515 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:23:39,515 INFO L551 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:23:39,715 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135080 [2021-05-03 14:23:39,715 INFO L428 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:23:39,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:23:39,716 INFO L82 PathProgramCache]: Analyzing trace with hash -743867577, now seen corresponding path program 250 times [2021-05-03 14:23:39,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:23:39,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387600318] [2021-05-03 14:23:39,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:23:39,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:23:39,900 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:23:39,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387600318] [2021-05-03 14:23:39,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753596742] [2021-05-03 14:23:39,900 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 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:23:39,918 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:23:39,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:23:39,919 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 14:23:39,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:23:40,468 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:23:40,469 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:23:40,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:23:40,948 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:23:41,660 WARN L205 SmtUtils]: Spent 635.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-05-03 14:23:41,661 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-05-03 14:23:41,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-05-03 14:23:46,293 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:23:46,850 WARN L205 SmtUtils]: Spent 492.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-05-03 14:23:46,851 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-05-03 14:23:46,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-05-03 14:23:48,646 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-05-03 14:23:49,039 WARN L205 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:23:49,040 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:23:49,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:23:49,827 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-05-03 14:23:49,859 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-05-03 14:23:49,860 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:23:49,860 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-05-03 14:23:49,908 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:23:49,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:23:49,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-05-03 14:23:49,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862908697] [2021-05-03 14:23:49,908 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 14:23:49,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:23:49,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 14:23:49,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=629, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:23:49,909 INFO L87 Difference]: Start difference. First operand 1488 states and 4834 transitions. Second operand has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:23:51,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:23:51,372 INFO L93 Difference]: Finished difference Result 1769 states and 5472 transitions. [2021-05-03 14:23:51,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-03 14:23:51,373 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:23:51,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:23:51,376 INFO L225 Difference]: With dead ends: 1769 [2021-05-03 14:23:51,376 INFO L226 Difference]: Without dead ends: 1747 [2021-05-03 14:23:51,376 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 1280.1ms TimeCoverageRelationStatistics Valid=284, Invalid=2266, Unknown=0, NotChecked=0, Total=2550 [2021-05-03 14:23:51,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1747 states. [2021-05-03 14:23:51,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1747 to 1490. [2021-05-03 14:23:51,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1490 states, 1489 states have (on average 3.2478173270651443) internal successors, (4836), 1489 states have internal predecessors, (4836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:23:51,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1490 states to 1490 states and 4836 transitions. [2021-05-03 14:23:51,394 INFO L78 Accepts]: Start accepts. Automaton has 1490 states and 4836 transitions. Word has length 20 [2021-05-03 14:23:51,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:23:51,394 INFO L480 AbstractCegarLoop]: Abstraction has 1490 states and 4836 transitions. [2021-05-03 14:23:51,394 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:23:51,395 INFO L276 IsEmpty]: Start isEmpty. Operand 1490 states and 4836 transitions. [2021-05-03 14:23:51,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:23:51,396 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:23:51,396 INFO L551 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:23:51,596 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139852 [2021-05-03 14:23:51,597 INFO L428 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:23:51,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:23:51,597 INFO L82 PathProgramCache]: Analyzing trace with hash 350224011, now seen corresponding path program 251 times [2021-05-03 14:23:51,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:23:51,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251293761] [2021-05-03 14:23:51,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:23:51,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:23:51,791 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:23:51,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251293761] [2021-05-03 14:23:51,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019271110] [2021-05-03 14:23:51,791 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 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:23:51,813 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 14:23:51,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:23:51,814 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 14:23:51,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:23:52,341 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 1860 DAG size of output: 55 [2021-05-03 14:23:52,793 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:23:52,793 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:23:52,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 Received shutdown request... [2021-05-03 14:23:53,299 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141499,265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:23:53,299 WARN L545 AbstractCegarLoop]: Verification canceled [2021-05-03 14:23:53,302 WARN L224 ceAbstractionStarter]: Timeout [2021-05-03 14:23:53,303 INFO L202 PluginConnector]: Adding new model unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.05 02:23:53 BasicIcfg [2021-05-03 14:23:53,303 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-03 14:23:53,303 INFO L168 Benchmark]: Toolchain (without parser) took 897709.39 ms. Allocated memory was 348.1 MB in the beginning and 3.0 GB in the end (delta: 2.7 GB). Free memory was 327.3 MB in the beginning and 2.8 GB in the end (delta: -2.5 GB). Peak memory consumption was 1.9 GB. Max. memory is 16.0 GB. [2021-05-03 14:23:53,303 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 348.1 MB. Free memory is still 328.5 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-05-03 14:23:53,303 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.77 ms. Allocated memory is still 348.1 MB. Free memory was 327.2 MB in the beginning and 325.8 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-03 14:23:53,303 INFO L168 Benchmark]: Boogie Preprocessor took 23.57 ms. Allocated memory is still 348.1 MB. Free memory was 325.8 MB in the beginning and 324.8 MB in the end (delta: 992.0 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-05-03 14:23:53,303 INFO L168 Benchmark]: RCFGBuilder took 439.66 ms. Allocated memory is still 348.1 MB. Free memory was 324.7 MB in the beginning and 330.4 MB in the end (delta: -5.7 MB). Peak memory consumption was 21.5 MB. Max. memory is 16.0 GB. [2021-05-03 14:23:53,303 INFO L168 Benchmark]: TraceAbstraction took 897172.78 ms. Allocated memory was 348.1 MB in the beginning and 3.0 GB in the end (delta: 2.7 GB). Free memory was 329.4 MB in the beginning and 2.8 GB in the end (delta: -2.5 GB). Peak memory consumption was 1.9 GB. Max. memory is 16.0 GB. [2021-05-03 14:23:53,303 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 0.11 ms. Allocated memory is still 348.1 MB. Free memory is still 328.5 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 42.77 ms. Allocated memory is still 348.1 MB. Free memory was 327.2 MB in the beginning and 325.8 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 23.57 ms. Allocated memory is still 348.1 MB. Free memory was 325.8 MB in the beginning and 324.8 MB in the end (delta: 992.0 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 439.66 ms. Allocated memory is still 348.1 MB. Free memory was 324.7 MB in the beginning and 330.4 MB in the end (delta: -5.7 MB). Peak memory consumption was 21.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 897172.78 ms. Allocated memory was 348.1 MB in the beginning and 3.0 GB in the end (delta: 2.7 GB). Free memory was 329.4 MB in the beginning and 2.8 GB in the end (delta: -2.5 GB). Peak memory consumption was 1.9 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 65]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 65). Cancelled while BasicCegarLoop was analyzing trace of length 21 with TraceHistMax 8,while TraceCheckSpWp was constructing forward predicates,while PartialQuantifierElimination was eliminating quantifiers from formula with 0 quantifier alternations,while QuantifierPusher was running 1 iterations of DualJunctionQuantifierElimination. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 15 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 897089.7ms, OverallIterations: 268, TraceHistogramMax: 8, EmptinessCheckTime: 177.6ms, AutomataDifference: 89252.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 15.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 5377 SDtfs, 12001 SDslu, 43877 SDs, 0 SdLazy, 86968 SolverSat, 8706 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 37492.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9146 GetRequests, 3262 SyntacticMatches, 93 SemanticMatches, 5791 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33575 ImplicationChecksByTransitivity, 83161.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1490occurred in iteration=267, InterpolantAutomatonStates: 4956, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1728.7ms AutomataMinimizationTime, 267 MinimizatonAttempts, 27003 StatesRemovedByMinimization, 263 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 818.7ms SsaConstructionTime, 2878.8ms SatisfiabilityAnalysisTime, 740981.0ms InterpolantComputationTime, 9291 NumberOfCodeBlocks, 9291 NumberOfCodeBlocksAsserted, 1027 NumberOfCheckSat, 8761 ConstructedInterpolants, 1 QuantifiedInterpolants, 88882 SizeOfPredicates, 403 NumberOfNonLiveVariables, 18118 ConjunctsInSsa, 6106 ConjunctsInUnsatCore, 530 InterpolantComputations, 4 PerfectInterpolantSequences, 2028/13329 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