/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/popl20-more/dec-subseq.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 06:25:29,458 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 06:25:29,460 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 06:25:29,489 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 06:25:29,530 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 [2021-06-05 06:25:29,571 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 06:25:29,572 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 06:25:29,572 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 06:25:29,572 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 06:25:29,575 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 06:25:29,575 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 06:25:29,575 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 06:25:29,575 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 06:25:29,575 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 06:25:29,576 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 06:25:29,576 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 06:25:29,577 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 06:25:29,577 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 06:25:29,577 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 06:25:29,577 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 06:25:29,577 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 06:25:29,577 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 06:25:29,577 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 06:25:29,577 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 06:25:29,578 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 06:25:29,578 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 06:25:29,578 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 06:25:29,578 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 06:25:29,578 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 06:25:29,578 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 06:25:29,578 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 06:25:29,579 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 06:25:29,579 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 06:25:29,579 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 06:25:29,579 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 06:25:29,579 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 06:25:29,579 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 06:25:29,863 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 06:25:29,889 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 06:25:29,892 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 06:25:29,896 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 06:25:29,898 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 06:25:29,898 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/dec-subseq.wvr.bpl [2021-06-05 06:25:29,899 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/dec-subseq.wvr.bpl' [2021-06-05 06:25:29,929 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 06:25:29,931 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 06:25:29,933 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 06:25:29,933 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 06:25:29,933 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 06:25:29,943 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "dec-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:25:29" (1/1) ... [2021-06-05 06:25:29,950 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "dec-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:25:29" (1/1) ... [2021-06-05 06:25:29,955 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 06:25:29,956 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 06:25:29,956 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 06:25:29,956 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 06:25:29,963 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "dec-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:25:29" (1/1) ... [2021-06-05 06:25:29,963 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "dec-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:25:29" (1/1) ... [2021-06-05 06:25:29,964 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "dec-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:25:29" (1/1) ... [2021-06-05 06:25:29,964 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "dec-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:25:29" (1/1) ... [2021-06-05 06:25:29,966 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "dec-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:25:29" (1/1) ... [2021-06-05 06:25:29,968 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "dec-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:25:29" (1/1) ... [2021-06-05 06:25:29,969 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "dec-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:25:29" (1/1) ... [2021-06-05 06:25:29,970 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 06:25:29,971 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 06:25:29,971 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 06:25:29,971 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 06:25:29,973 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "dec-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:25:29" (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 [2021-06-05 06:25:30,037 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 06:25:30,037 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 06:25:30,038 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 06:25:30,038 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 06:25:30,038 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 06:25:30,038 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 06:25:30,038 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 06:25:30,038 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 06:25:30,038 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 06:25:30,039 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 06:25:30,307 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 06:25:30,307 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 06:25:30,308 INFO L202 PluginConnector]: Adding new model dec-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 06:25:30 BoogieIcfgContainer [2021-06-05 06:25:30,309 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 06:25:30,310 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 06:25:30,310 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 06:25:30,312 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 06:25:30,313 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "dec-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:25:29" (1/2) ... [2021-06-05 06:25:30,313 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@631d089f and model type dec-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 06:25:30, skipping insertion in model container [2021-06-05 06:25:30,314 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "dec-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 06:25:30" (2/2) ... [2021-06-05 06:25:30,315 INFO L111 eAbstractionObserver]: Analyzing ICFG dec-subseq.wvr.bpl [2021-06-05 06:25:30,319 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 06:25:30,320 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 06:25:30,320 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 06:25:30,325 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 06:25:30,366 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-05 06:25:30,380 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 06:25:30,397 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 06:25:30,397 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 06:25:30,409 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 06:25:30,409 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 06:25:30,409 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 06:25:30,409 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 06:25:30,409 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 06:25:30,409 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 06:25:30,417 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 28 transitions, 72 flow [2021-06-05 06:25:30,437 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 65 states, 63 states have (on average 2.015873015873016) internal successors, (127), 64 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:30,440 INFO L276 IsEmpty]: Start isEmpty. Operand has 65 states, 63 states have (on average 2.015873015873016) internal successors, (127), 64 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:30,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 06:25:30,446 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:25:30,446 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:25:30,446 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:25:30,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:25:30,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1034289359, now seen corresponding path program 1 times [2021-06-05 06:25:30,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:25:30,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671958171] [2021-06-05 06:25:30,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:25:30,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:25:30,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:30,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:25:30,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671958171] [2021-06-05 06:25:30,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671958171] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 06:25:30,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 06:25:30,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 06:25:30,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617056183] [2021-06-05 06:25:30,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 06:25:30,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:25:30,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 06:25:30,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 06:25:30,621 INFO L87 Difference]: Start difference. First operand has 65 states, 63 states have (on average 2.015873015873016) internal successors, (127), 64 states have internal predecessors, (127), 0 states have call successors, (0), 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 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 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) [2021-06-05 06:25:30,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:25:30,653 INFO L93 Difference]: Finished difference Result 104 states and 211 transitions. [2021-06-05 06:25:30,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 06:25:30,655 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 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 [2021-06-05 06:25:30,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:25:30,671 INFO L225 Difference]: With dead ends: 104 [2021-06-05 06:25:30,671 INFO L226 Difference]: Without dead ends: 87 [2021-06-05 06:25:30,673 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 06:25:30,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-06-05 06:25:30,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 71. [2021-06-05 06:25:30,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 2.0285714285714285) internal successors, (142), 70 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:30,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 142 transitions. [2021-06-05 06:25:30,721 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 142 transitions. Word has length 14 [2021-06-05 06:25:30,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:25:30,722 INFO L482 AbstractCegarLoop]: Abstraction has 71 states and 142 transitions. [2021-06-05 06:25:30,722 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 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) [2021-06-05 06:25:30,722 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 142 transitions. [2021-06-05 06:25:30,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 06:25:30,724 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:25:30,724 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:25:30,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 06:25:30,724 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:25:30,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:25:30,728 INFO L82 PathProgramCache]: Analyzing trace with hash -690736212, now seen corresponding path program 1 times [2021-06-05 06:25:30,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:25:30,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653456997] [2021-06-05 06:25:30,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:25:30,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:25:30,800 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:30,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:25:30,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653456997] [2021-06-05 06:25:30,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653456997] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 06:25:30,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 06:25:30,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 06:25:30,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920704365] [2021-06-05 06:25:30,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 06:25:30,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:25:30,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 06:25:30,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 06:25:30,806 INFO L87 Difference]: Start difference. First operand 71 states and 142 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 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) [2021-06-05 06:25:30,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:25:30,851 INFO L93 Difference]: Finished difference Result 91 states and 175 transitions. [2021-06-05 06:25:30,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 06:25:30,852 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 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 18 [2021-06-05 06:25:30,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:25:30,855 INFO L225 Difference]: With dead ends: 91 [2021-06-05 06:25:30,855 INFO L226 Difference]: Without dead ends: 83 [2021-06-05 06:25:30,856 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.3ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 06:25:30,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-06-05 06:25:30,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-06-05 06:25:30,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.0121951219512195) internal successors, (165), 82 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:30,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 165 transitions. [2021-06-05 06:25:30,863 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 165 transitions. Word has length 18 [2021-06-05 06:25:30,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:25:30,863 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 165 transitions. [2021-06-05 06:25:30,863 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 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) [2021-06-05 06:25:30,863 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 165 transitions. [2021-06-05 06:25:30,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 06:25:30,864 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:25:30,867 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:25:30,867 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 06:25:30,867 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:25:30,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:25:30,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1451962588, now seen corresponding path program 1 times [2021-06-05 06:25:30,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:25:30,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047081289] [2021-06-05 06:25:30,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:25:30,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:25:31,075 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:31,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:25:31,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047081289] [2021-06-05 06:25:31,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047081289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:31,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436057042] [2021-06-05 06:25:31,076 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 [2021-06-05 06:25:31,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:25:31,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 06:25:31,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:25:31,297 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 13 treesize of output 9 [2021-06-05 06:25:31,310 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:25:31,315 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:31,316 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:25:31,317 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:14, output treesize:7 [2021-06-05 06:25:31,349 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 [2021-06-05 06:25:31,352 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:25:31,374 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:31,375 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:25:31,375 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:12, output treesize:5 [2021-06-05 06:25:31,443 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:31,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436057042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:31,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:25:31,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-05 06:25:31,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142691483] [2021-06-05 06:25:31,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 06:25:31,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:25:31,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 06:25:31,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:25:31,453 INFO L87 Difference]: Start difference. First operand 83 states and 165 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 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) [2021-06-05 06:25:31,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:25:31,584 INFO L93 Difference]: Finished difference Result 154 states and 314 transitions. [2021-06-05 06:25:31,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 06:25:31,585 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 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 23 [2021-06-05 06:25:31,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:25:31,587 INFO L225 Difference]: With dead ends: 154 [2021-06-05 06:25:31,588 INFO L226 Difference]: Without dead ends: 137 [2021-06-05 06:25:31,588 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 131.6ms TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:25:31,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-06-05 06:25:31,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 115. [2021-06-05 06:25:31,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.043859649122807) internal successors, (233), 114 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:31,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 233 transitions. [2021-06-05 06:25:31,609 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 233 transitions. Word has length 23 [2021-06-05 06:25:31,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:25:31,610 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 233 transitions. [2021-06-05 06:25:31,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 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) [2021-06-05 06:25:31,610 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 233 transitions. [2021-06-05 06:25:31,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:25:31,611 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:25:31,611 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:25:31,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-06-05 06:25:31,812 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:25:31,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:25:31,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1705470663, now seen corresponding path program 2 times [2021-06-05 06:25:31,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:25:31,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978519899] [2021-06-05 06:25:31,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:25:31,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:25:31,890 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:31,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:25:31,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978519899] [2021-06-05 06:25:31,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978519899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:31,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906512748] [2021-06-05 06:25:31,891 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 [2021-06-05 06:25:31,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:25:31,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:25:31,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 06:25:31,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:25:32,032 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:32,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906512748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:32,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:25:32,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 6 [2021-06-05 06:25:32,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453071024] [2021-06-05 06:25:32,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 06:25:32,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:25:32,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 06:25:32,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 06:25:32,035 INFO L87 Difference]: Start difference. First operand 115 states and 233 transitions. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:32,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:25:32,103 INFO L93 Difference]: Finished difference Result 284 states and 566 transitions. [2021-06-05 06:25:32,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 06:25:32,104 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 06:25:32,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:25:32,105 INFO L225 Difference]: With dead ends: 284 [2021-06-05 06:25:32,105 INFO L226 Difference]: Without dead ends: 264 [2021-06-05 06:25:32,106 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 29.8ms TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-06-05 06:25:32,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-06-05 06:25:32,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 230. [2021-06-05 06:25:32,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.1222707423580784) internal successors, (486), 229 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:32,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 486 transitions. [2021-06-05 06:25:32,129 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 486 transitions. Word has length 27 [2021-06-05 06:25:32,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:25:32,129 INFO L482 AbstractCegarLoop]: Abstraction has 230 states and 486 transitions. [2021-06-05 06:25:32,129 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:32,130 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 486 transitions. [2021-06-05 06:25:32,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 06:25:32,131 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:25:32,131 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:25:32,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:25:32,342 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:25:32,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:25:32,343 INFO L82 PathProgramCache]: Analyzing trace with hash -906793463, now seen corresponding path program 3 times [2021-06-05 06:25:32,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:25:32,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837825442] [2021-06-05 06:25:32,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:25:32,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:25:32,653 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:32,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:25:32,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837825442] [2021-06-05 06:25:32,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837825442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:32,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868956208] [2021-06-05 06:25:32,654 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 [2021-06-05 06:25:32,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:25:32,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:25:32,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 06:25:32,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:25:32,937 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:32,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 27 [2021-06-05 06:25:32,953 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:25:32,965 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:32,967 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:25:32,968 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:30, output treesize:16 [2021-06-05 06:25:33,267 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:33,267 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 38 [2021-06-05 06:25:33,358 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:25:33,369 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:33,382 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:25:33,383 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:21 [2021-06-05 06:25:33,470 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:33,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868956208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:33,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:25:33,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 27 [2021-06-05 06:25:33,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253028291] [2021-06-05 06:25:33,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 06:25:33,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:25:33,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 06:25:33,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:25:33,473 INFO L87 Difference]: Start difference. First operand 230 states and 486 transitions. Second operand has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:35,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:25:35,516 INFO L93 Difference]: Finished difference Result 650 states and 1347 transitions. [2021-06-05 06:25:35,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 06:25:35,517 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 06:25:35,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:25:35,520 INFO L225 Difference]: With dead ends: 650 [2021-06-05 06:25:35,520 INFO L226 Difference]: Without dead ends: 573 [2021-06-05 06:25:35,521 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 1678.7ms TimeCoverageRelationStatistics Valid=665, Invalid=2875, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 06:25:35,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2021-06-05 06:25:35,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 386. [2021-06-05 06:25:35,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 2.1818181818181817) internal successors, (840), 385 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:35,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 840 transitions. [2021-06-05 06:25:35,535 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 840 transitions. Word has length 32 [2021-06-05 06:25:35,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:25:35,536 INFO L482 AbstractCegarLoop]: Abstraction has 386 states and 840 transitions. [2021-06-05 06:25:35,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:35,536 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 840 transitions. [2021-06-05 06:25:35,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 06:25:35,538 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:25:35,539 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:25:35,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:25:35,753 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:25:35,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:25:35,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1731045687, now seen corresponding path program 4 times [2021-06-05 06:25:35,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:25:35,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106020841] [2021-06-05 06:25:35,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:25:35,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:25:35,981 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:25:35,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:25:35,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106020841] [2021-06-05 06:25:35,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106020841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:35,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363292370] [2021-06-05 06:25:35,982 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:25:36,027 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:25:36,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:25:36,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 06:25:36,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:25:36,432 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:36,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2021-06-05 06:25:36,439 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:25:36,448 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:36,451 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:25:36,451 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:44, output treesize:30 [2021-06-05 06:25:36,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:36,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:25:36,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2021-06-05 06:25:36,567 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:25:36,577 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:36,579 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:25:36,579 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:5 [2021-06-05 06:25:36,591 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:36,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363292370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:36,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:25:36,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 23 [2021-06-05 06:25:36,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837978610] [2021-06-05 06:25:36,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 06:25:36,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:25:36,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 06:25:36,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:25:36,593 INFO L87 Difference]: Start difference. First operand 386 states and 840 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:37,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:25:37,389 INFO L93 Difference]: Finished difference Result 1023 states and 2148 transitions. [2021-06-05 06:25:37,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 06:25:37,389 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 06:25:37,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:25:37,393 INFO L225 Difference]: With dead ends: 1023 [2021-06-05 06:25:37,393 INFO L226 Difference]: Without dead ends: 878 [2021-06-05 06:25:37,394 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 723.6ms TimeCoverageRelationStatistics Valid=289, Invalid=1271, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 06:25:37,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2021-06-05 06:25:37,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 432. [2021-06-05 06:25:37,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 2.1786542923433876) internal successors, (939), 431 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:37,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 939 transitions. [2021-06-05 06:25:37,409 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 939 transitions. Word has length 32 [2021-06-05 06:25:37,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:25:37,410 INFO L482 AbstractCegarLoop]: Abstraction has 432 states and 939 transitions. [2021-06-05 06:25:37,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:37,410 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 939 transitions. [2021-06-05 06:25:37,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 06:25:37,411 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:25:37,411 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:25:37,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:25:37,629 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:25:37,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:25:37,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1528740313, now seen corresponding path program 5 times [2021-06-05 06:25:37,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:25:37,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494690175] [2021-06-05 06:25:37,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:25:37,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:25:37,876 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:37,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:25:37,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494690175] [2021-06-05 06:25:37,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494690175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:37,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154399736] [2021-06-05 06:25:37,876 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 [2021-06-05 06:25:37,906 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:25:37,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:25:37,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 06:25:37,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:25:38,200 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:38,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2021-06-05 06:25:38,207 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:25:38,215 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:38,217 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:25:38,217 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:38, output treesize:24 [2021-06-05 06:25:38,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:38,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:25:38,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-06-05 06:25:38,353 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:25:38,359 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:38,360 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:25:38,360 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:5 [2021-06-05 06:25:38,374 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:38,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154399736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:38,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:25:38,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 24 [2021-06-05 06:25:38,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433702333] [2021-06-05 06:25:38,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 06:25:38,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:25:38,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 06:25:38,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:25:38,376 INFO L87 Difference]: Start difference. First operand 432 states and 939 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:39,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:25:39,157 INFO L93 Difference]: Finished difference Result 1081 states and 2273 transitions. [2021-06-05 06:25:39,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 06:25:39,158 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 06:25:39,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:25:39,162 INFO L225 Difference]: With dead ends: 1081 [2021-06-05 06:25:39,162 INFO L226 Difference]: Without dead ends: 927 [2021-06-05 06:25:39,163 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 716.2ms TimeCoverageRelationStatistics Valid=295, Invalid=1345, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 06:25:39,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2021-06-05 06:25:39,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 450. [2021-06-05 06:25:39,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 2.1848552338530065) internal successors, (981), 449 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:39,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 981 transitions. [2021-06-05 06:25:39,177 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 981 transitions. Word has length 32 [2021-06-05 06:25:39,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:25:39,177 INFO L482 AbstractCegarLoop]: Abstraction has 450 states and 981 transitions. [2021-06-05 06:25:39,177 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:39,177 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 981 transitions. [2021-06-05 06:25:39,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 06:25:39,178 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:25:39,179 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:25:39,393 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 06:25:39,394 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:25:39,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:25:39,395 INFO L82 PathProgramCache]: Analyzing trace with hash -897893841, now seen corresponding path program 6 times [2021-06-05 06:25:39,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:25:39,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531177226] [2021-06-05 06:25:39,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:25:39,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:25:39,646 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:25:39,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:25:39,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531177226] [2021-06-05 06:25:39,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531177226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:39,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755394438] [2021-06-05 06:25:39,647 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 [2021-06-05 06:25:39,680 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:25:39,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:25:39,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 06:25:39,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:25:39,968 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:39,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2021-06-05 06:25:39,972 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:25:39,981 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:39,982 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:25:39,983 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:38, output treesize:24 [2021-06-05 06:25:40,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:40,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:40,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:25:40,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-06-05 06:25:40,071 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:25:40,076 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:40,078 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:25:40,078 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:5 [2021-06-05 06:25:40,097 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:40,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755394438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:40,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:25:40,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 22 [2021-06-05 06:25:40,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50047845] [2021-06-05 06:25:40,098 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:25:40,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:25:40,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:25:40,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:25:40,099 INFO L87 Difference]: Start difference. First operand 450 states and 981 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 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) [2021-06-05 06:25:40,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:25:40,669 INFO L93 Difference]: Finished difference Result 1039 states and 2202 transitions. [2021-06-05 06:25:40,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 06:25:40,669 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 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) Word has length 32 [2021-06-05 06:25:40,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:25:40,673 INFO L225 Difference]: With dead ends: 1039 [2021-06-05 06:25:40,673 INFO L226 Difference]: Without dead ends: 929 [2021-06-05 06:25:40,674 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 563.0ms TimeCoverageRelationStatistics Valid=206, Invalid=850, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 06:25:40,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2021-06-05 06:25:40,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 487. [2021-06-05 06:25:40,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 486 states have (on average 2.1790123456790123) internal successors, (1059), 486 states have internal predecessors, (1059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:40,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 1059 transitions. [2021-06-05 06:25:40,688 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 1059 transitions. Word has length 32 [2021-06-05 06:25:40,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:25:40,688 INFO L482 AbstractCegarLoop]: Abstraction has 487 states and 1059 transitions. [2021-06-05 06:25:40,688 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 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) [2021-06-05 06:25:40,688 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 1059 transitions. [2021-06-05 06:25:40,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 06:25:40,689 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:25:40,689 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:25:40,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:25:40,905 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:25:40,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:25:40,905 INFO L82 PathProgramCache]: Analyzing trace with hash -960521271, now seen corresponding path program 7 times [2021-06-05 06:25:40,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:25:40,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963328232] [2021-06-05 06:25:40,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:25:40,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:25:41,145 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:41,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:25:41,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963328232] [2021-06-05 06:25:41,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963328232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:41,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841090155] [2021-06-05 06:25:41,146 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:25:41,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:25:41,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 06:25:41,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:25:41,453 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:41,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2021-06-05 06:25:41,457 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:25:41,466 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:41,470 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:25:41,470 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:44, output treesize:30 [2021-06-05 06:25:41,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:41,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:41,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:25:41,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2021-06-05 06:25:41,587 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:25:41,593 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:41,595 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:25:41,596 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:5 [2021-06-05 06:25:41,607 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:41,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841090155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:41,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:25:41,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 24 [2021-06-05 06:25:41,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156248077] [2021-06-05 06:25:41,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 06:25:41,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:25:41,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 06:25:41,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:25:41,609 INFO L87 Difference]: Start difference. First operand 487 states and 1059 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:42,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:25:42,186 INFO L93 Difference]: Finished difference Result 1050 states and 2227 transitions. [2021-06-05 06:25:42,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 06:25:42,186 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 06:25:42,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:25:42,190 INFO L225 Difference]: With dead ends: 1050 [2021-06-05 06:25:42,190 INFO L226 Difference]: Without dead ends: 952 [2021-06-05 06:25:42,190 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 550.7ms TimeCoverageRelationStatistics Valid=182, Invalid=810, Unknown=0, NotChecked=0, Total=992 [2021-06-05 06:25:42,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 952 states. [2021-06-05 06:25:42,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 952 to 467. [2021-06-05 06:25:42,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 466 states have (on average 2.1609442060085837) internal successors, (1007), 466 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:42,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 1007 transitions. [2021-06-05 06:25:42,204 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 1007 transitions. Word has length 32 [2021-06-05 06:25:42,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:25:42,205 INFO L482 AbstractCegarLoop]: Abstraction has 467 states and 1007 transitions. [2021-06-05 06:25:42,205 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:42,205 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 1007 transitions. [2021-06-05 06:25:42,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 06:25:42,206 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:25:42,206 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:25:42,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:25:42,421 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:25:42,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:25:42,421 INFO L82 PathProgramCache]: Analyzing trace with hash 2010412006, now seen corresponding path program 8 times [2021-06-05 06:25:42,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:25:42,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706498727] [2021-06-05 06:25:42,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:25:42,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:25:42,481 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:42,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:25:42,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706498727] [2021-06-05 06:25:42,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706498727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:42,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87371623] [2021-06-05 06:25:42,482 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 [2021-06-05 06:25:42,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:25:42,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:25:42,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 06:25:42,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:25:42,565 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:42,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87371623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:42,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:25:42,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 8 [2021-06-05 06:25:42,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176198968] [2021-06-05 06:25:42,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 06:25:42,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:25:42,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 06:25:42,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 06:25:42,567 INFO L87 Difference]: Start difference. First operand 467 states and 1007 transitions. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 8 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) [2021-06-05 06:25:42,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:25:42,640 INFO L93 Difference]: Finished difference Result 885 states and 1908 transitions. [2021-06-05 06:25:42,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 06:25:42,640 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 8 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) Word has length 36 [2021-06-05 06:25:42,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:25:42,643 INFO L225 Difference]: With dead ends: 885 [2021-06-05 06:25:42,644 INFO L226 Difference]: Without dead ends: 847 [2021-06-05 06:25:42,644 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 39.3ms TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2021-06-05 06:25:42,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2021-06-05 06:25:42,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 716. [2021-06-05 06:25:42,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 2.1846153846153844) internal successors, (1562), 715 states have internal predecessors, (1562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:42,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1562 transitions. [2021-06-05 06:25:42,660 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1562 transitions. Word has length 36 [2021-06-05 06:25:42,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:25:42,660 INFO L482 AbstractCegarLoop]: Abstraction has 716 states and 1562 transitions. [2021-06-05 06:25:42,661 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 8 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) [2021-06-05 06:25:42,661 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1562 transitions. [2021-06-05 06:25:42,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 06:25:42,662 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:25:42,662 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:25:42,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 06:25:42,877 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:25:42,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:25:42,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1466399466, now seen corresponding path program 9 times [2021-06-05 06:25:42,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:25:42,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446518373] [2021-06-05 06:25:42,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:25:42,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:25:43,232 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:43,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:25:43,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446518373] [2021-06-05 06:25:43,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446518373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:43,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626124185] [2021-06-05 06:25:43,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:25:43,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:25:43,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:25:43,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 06:25:43,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:25:43,601 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:43,601 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 53 [2021-06-05 06:25:43,610 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:25:43,653 INFO L628 ElimStorePlain]: treesize reduction 43, result has 58.3 percent of original size [2021-06-05 06:25:43,655 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:25:43,655 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:51, output treesize:32 [2021-06-05 06:25:43,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:43,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:43,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:43,955 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:43,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 43 [2021-06-05 06:25:43,980 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:25:43,991 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:43,995 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:25:43,996 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:26 [2021-06-05 06:25:44,072 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:44,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626124185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:44,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:25:44,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 41 [2021-06-05 06:25:44,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669209080] [2021-06-05 06:25:44,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-06-05 06:25:44,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:25:44,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-06-05 06:25:44,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1486, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 06:25:44,074 INFO L87 Difference]: Start difference. First operand 716 states and 1562 transitions. Second operand has 42 states, 42 states have (on average 1.8333333333333333) internal successors, (77), 41 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:48,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:25:48,189 INFO L93 Difference]: Finished difference Result 2812 states and 6023 transitions. [2021-06-05 06:25:48,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-06-05 06:25:48,189 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.8333333333333333) internal successors, (77), 41 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 06:25:48,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:25:48,200 INFO L225 Difference]: With dead ends: 2812 [2021-06-05 06:25:48,200 INFO L226 Difference]: Without dead ends: 2548 [2021-06-05 06:25:48,203 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3752 ImplicationChecksByTransitivity, 3179.9ms TimeCoverageRelationStatistics Valid=1451, Invalid=10321, Unknown=0, NotChecked=0, Total=11772 [2021-06-05 06:25:48,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2548 states. [2021-06-05 06:25:48,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2548 to 737. [2021-06-05 06:25:48,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 736 states have (on average 2.1480978260869565) internal successors, (1581), 736 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:48,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 1581 transitions. [2021-06-05 06:25:48,232 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 1581 transitions. Word has length 41 [2021-06-05 06:25:48,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:25:48,232 INFO L482 AbstractCegarLoop]: Abstraction has 737 states and 1581 transitions. [2021-06-05 06:25:48,233 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 1.8333333333333333) internal successors, (77), 41 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:48,233 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 1581 transitions. [2021-06-05 06:25:48,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 06:25:48,234 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:25:48,234 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:25:48,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:25:48,453 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:25:48,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:25:48,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1999894166, now seen corresponding path program 10 times [2021-06-05 06:25:48,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:25:48,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956238353] [2021-06-05 06:25:48,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:25:48,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:25:48,794 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:25:48,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:25:48,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956238353] [2021-06-05 06:25:48,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956238353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:48,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215385632] [2021-06-05 06:25:48,795 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:25:48,826 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:25:48,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:25:48,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:25:48,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:25:49,508 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:49,509 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 52 [2021-06-05 06:25:49,515 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:25:49,552 INFO L628 ElimStorePlain]: treesize reduction 16, result has 84.3 percent of original size [2021-06-05 06:25:49,563 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:25:49,563 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:60, output treesize:65 [2021-06-05 06:25:49,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:49,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:49,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:49,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:49,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:49,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:49,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:25:49,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:25:49,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:25:49,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:25:49,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 16 [2021-06-05 06:25:49,959 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:25:49,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:49,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:49,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:49,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:49,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:49,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:49,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:25:49,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:25:49,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 13 [2021-06-05 06:25:49,973 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:25:49,979 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:49,980 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:25:49,981 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:104, output treesize:5 [2021-06-05 06:25:49,990 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:49,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215385632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:49,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:25:49,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 35 [2021-06-05 06:25:49,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891731086] [2021-06-05 06:25:49,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 06:25:49,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:25:49,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 06:25:49,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1084, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 06:25:49,993 INFO L87 Difference]: Start difference. First operand 737 states and 1581 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:52,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:25:52,077 INFO L93 Difference]: Finished difference Result 2302 states and 4879 transitions. [2021-06-05 06:25:52,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 06:25:52,078 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 06:25:52,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:25:52,085 INFO L225 Difference]: With dead ends: 2302 [2021-06-05 06:25:52,086 INFO L226 Difference]: Without dead ends: 2145 [2021-06-05 06:25:52,087 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 21 SyntacticMatches, 8 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1950 ImplicationChecksByTransitivity, 1875.8ms TimeCoverageRelationStatistics Valid=673, Invalid=4297, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 06:25:52,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2145 states. [2021-06-05 06:25:52,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2145 to 854. [2021-06-05 06:25:52,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 854 states, 853 states have (on average 2.138335287221571) internal successors, (1824), 853 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:52,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 1824 transitions. [2021-06-05 06:25:52,115 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 1824 transitions. Word has length 41 [2021-06-05 06:25:52,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:25:52,115 INFO L482 AbstractCegarLoop]: Abstraction has 854 states and 1824 transitions. [2021-06-05 06:25:52,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:52,115 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 1824 transitions. [2021-06-05 06:25:52,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 06:25:52,117 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:25:52,117 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:25:52,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:25:52,341 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:25:52,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:25:52,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1038925816, now seen corresponding path program 11 times [2021-06-05 06:25:52,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:25:52,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194208586] [2021-06-05 06:25:52,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:25:52,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:25:52,725 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:52,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:25:52,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194208586] [2021-06-05 06:25:52,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194208586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:52,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302015169] [2021-06-05 06:25:52,726 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:25:52,755 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:25:52,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:25:52,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 06:25:52,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:25:53,410 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:53,411 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 50 [2021-06-05 06:25:53,418 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:25:53,460 INFO L628 ElimStorePlain]: treesize reduction 16, result has 83.0 percent of original size [2021-06-05 06:25:53,470 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:25:53,470 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:54, output treesize:57 [2021-06-05 06:25:53,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:53,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:53,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:53,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:53,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:53,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:25:53,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:53,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:25:53,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-06-05 06:25:53,722 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:25:53,728 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:53,730 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:25:53,730 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:40, output treesize:5 [2021-06-05 06:25:53,738 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:53,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302015169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:53,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:25:53,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-06-05 06:25:53,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832107209] [2021-06-05 06:25:53,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 06:25:53,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:25:53,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 06:25:53,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1153, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 06:25:53,740 INFO L87 Difference]: Start difference. First operand 854 states and 1824 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:56,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:25:56,452 INFO L93 Difference]: Finished difference Result 2586 states and 5448 transitions. [2021-06-05 06:25:56,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 06:25:56,452 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 06:25:56,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:25:56,459 INFO L225 Difference]: With dead ends: 2586 [2021-06-05 06:25:56,459 INFO L226 Difference]: Without dead ends: 2295 [2021-06-05 06:25:56,460 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2184 ImplicationChecksByTransitivity, 2142.6ms TimeCoverageRelationStatistics Valid=836, Invalid=5326, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 06:25:56,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2295 states. [2021-06-05 06:25:56,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2295 to 746. [2021-06-05 06:25:56,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 745 states have (on average 2.153020134228188) internal successors, (1604), 745 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:56,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 1604 transitions. [2021-06-05 06:25:56,483 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 1604 transitions. Word has length 41 [2021-06-05 06:25:56,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:25:56,483 INFO L482 AbstractCegarLoop]: Abstraction has 746 states and 1604 transitions. [2021-06-05 06:25:56,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:56,483 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 1604 transitions. [2021-06-05 06:25:56,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 06:25:56,485 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:25:56,485 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:25:56,707 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:25:56,707 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:25:56,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:25:56,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1257871970, now seen corresponding path program 12 times [2021-06-05 06:25:56,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:25:56,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083807933] [2021-06-05 06:25:56,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:25:56,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:25:57,041 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:25:57,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:25:57,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083807933] [2021-06-05 06:25:57,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083807933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:57,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13511404] [2021-06-05 06:25:57,041 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:25:57,071 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:25:57,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:25:57,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 06:25:57,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:25:57,902 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:57,902 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 50 [2021-06-05 06:25:57,908 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:25:57,953 INFO L628 ElimStorePlain]: treesize reduction 14, result has 83.7 percent of original size [2021-06-05 06:25:57,978 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 06:25:57,979 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:52, output treesize:53 [2021-06-05 06:25:59,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:59,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:59,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:25:59,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:25:59,448 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:59,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 29 treesize of output 63 [2021-06-05 06:25:59,507 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 06:25:59,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:59,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:59,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:25:59,522 INFO L354 Elim1Store]: treesize reduction 50, result has 2.0 percent of original size [2021-06-05 06:25:59,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 40 treesize of output 1 [2021-06-05 06:25:59,523 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:25:59,557 INFO L628 ElimStorePlain]: treesize reduction 21, result has 59.6 percent of original size [2021-06-05 06:25:59,562 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:25:59,562 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:100, output treesize:21 [2021-06-05 06:25:59,652 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:59,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13511404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:59,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:25:59,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 36 [2021-06-05 06:25:59,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068882853] [2021-06-05 06:25:59,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 06:25:59,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:25:59,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 06:25:59,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1142, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 06:25:59,654 INFO L87 Difference]: Start difference. First operand 746 states and 1604 transitions. Second operand has 37 states, 37 states have (on average 2.027027027027027) 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) [2021-06-05 06:26:02,156 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-06-05 06:26:03,100 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-06-05 06:26:04,690 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-06-05 06:26:05,409 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2021-06-05 06:26:05,825 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2021-06-05 06:26:06,453 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2021-06-05 06:26:07,104 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-06-05 06:26:10,775 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2021-06-05 06:26:12,794 WARN L205 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 63 [2021-06-05 06:26:13,265 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2021-06-05 06:26:17,483 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2021-06-05 06:26:20,310 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 45 [2021-06-05 06:26:23,260 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2021-06-05 06:26:23,550 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 47 [2021-06-05 06:26:24,448 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2021-06-05 06:26:27,151 WARN L205 SmtUtils]: Spent 2.45 s on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2021-06-05 06:26:27,916 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2021-06-05 06:26:29,687 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 46 [2021-06-05 06:26:34,316 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2021-06-05 06:26:34,736 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2021-06-05 06:26:37,257 WARN L205 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 71 DAG size of output: 67 [2021-06-05 06:26:38,169 WARN L205 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2021-06-05 06:26:41,746 WARN L205 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 70 DAG size of output: 66 [2021-06-05 06:26:48,741 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2021-06-05 06:26:49,304 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2021-06-05 06:26:50,859 WARN L205 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2021-06-05 06:26:54,125 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2021-06-05 06:26:55,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:26:55,797 INFO L93 Difference]: Finished difference Result 3393 states and 7212 transitions. [2021-06-05 06:26:55,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-06-05 06:26:55,798 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.027027027027027) 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) Word has length 41 [2021-06-05 06:26:55,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:26:55,805 INFO L225 Difference]: With dead ends: 3393 [2021-06-05 06:26:55,805 INFO L226 Difference]: Without dead ends: 3071 [2021-06-05 06:26:55,808 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 20 SyntacticMatches, 8 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5840 ImplicationChecksByTransitivity, 37898.8ms TimeCoverageRelationStatistics Valid=2687, Invalid=14339, Unknown=4, NotChecked=0, Total=17030 [2021-06-05 06:26:55,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3071 states. [2021-06-05 06:26:55,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3071 to 882. [2021-06-05 06:26:55,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 882 states, 881 states have (on average 2.155505107832009) internal successors, (1899), 881 states have internal predecessors, (1899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:55,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 1899 transitions. [2021-06-05 06:26:55,837 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 1899 transitions. Word has length 41 [2021-06-05 06:26:55,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:26:55,837 INFO L482 AbstractCegarLoop]: Abstraction has 882 states and 1899 transitions. [2021-06-05 06:26:55,837 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.027027027027027) 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) [2021-06-05 06:26:55,837 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 1899 transitions. [2021-06-05 06:26:55,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 06:26:55,839 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:26:55,839 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:26:56,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:26:56,053 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:26:56,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:26:56,053 INFO L82 PathProgramCache]: Analyzing trace with hash -2064541460, now seen corresponding path program 13 times [2021-06-05 06:26:56,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:26:56,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016949010] [2021-06-05 06:26:56,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:26:56,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:26:56,519 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:26:56,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:26:56,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016949010] [2021-06-05 06:26:56,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016949010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:56,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853131286] [2021-06-05 06:26:56,520 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:26:56,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:26:56,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:26:56,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:26:57,321 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:57,321 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 52 [2021-06-05 06:26:57,325 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:26:57,367 INFO L628 ElimStorePlain]: treesize reduction 47, result has 60.8 percent of original size [2021-06-05 06:26:57,373 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:26:57,373 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:60, output treesize:41 [2021-06-05 06:26:57,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:26:57,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:26:57,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:26:57,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:26:57,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:26:57,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:26:57,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:26:57,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 13 [2021-06-05 06:26:57,462 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:26:57,470 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:57,472 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:26:57,472 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:5 [2021-06-05 06:26:57,482 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:57,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853131286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:57,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:26:57,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 35 [2021-06-05 06:26:57,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269783362] [2021-06-05 06:26:57,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 06:26:57,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:26:57,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 06:26:57,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1087, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 06:26:57,484 INFO L87 Difference]: Start difference. First operand 882 states and 1899 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:59,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:26:59,817 INFO L93 Difference]: Finished difference Result 3308 states and 7100 transitions. [2021-06-05 06:26:59,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 06:26:59,821 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 06:26:59,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:26:59,829 INFO L225 Difference]: With dead ends: 3308 [2021-06-05 06:26:59,830 INFO L226 Difference]: Without dead ends: 3100 [2021-06-05 06:26:59,831 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1398 ImplicationChecksByTransitivity, 1878.7ms TimeCoverageRelationStatistics Valid=578, Invalid=3582, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 06:26:59,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3100 states. [2021-06-05 06:26:59,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3100 to 1074. [2021-06-05 06:26:59,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1074 states, 1073 states have (on average 2.1491146318732524) internal successors, (2306), 1073 states have internal predecessors, (2306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:59,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1074 states to 1074 states and 2306 transitions. [2021-06-05 06:26:59,861 INFO L78 Accepts]: Start accepts. Automaton has 1074 states and 2306 transitions. Word has length 41 [2021-06-05 06:26:59,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:26:59,862 INFO L482 AbstractCegarLoop]: Abstraction has 1074 states and 2306 transitions. [2021-06-05 06:26:59,862 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:59,862 INFO L276 IsEmpty]: Start isEmpty. Operand 1074 states and 2306 transitions. [2021-06-05 06:26:59,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 06:26:59,864 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:26:59,864 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:27:00,087 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable142 [2021-06-05 06:27:00,087 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:27:00,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:27:00,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1195244540, now seen corresponding path program 14 times [2021-06-05 06:27:00,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:27:00,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211016024] [2021-06-05 06:27:00,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:27:00,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:27:00,480 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:00,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:27:00,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211016024] [2021-06-05 06:27:00,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211016024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:00,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225075827] [2021-06-05 06:27:00,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:27:00,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:27:00,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:27:00,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:27:00,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:27:01,181 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:01,181 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 52 [2021-06-05 06:27:01,187 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:27:01,238 INFO L628 ElimStorePlain]: treesize reduction 16, result has 84.3 percent of original size [2021-06-05 06:27:01,248 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:27:01,249 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:60, output treesize:65 [2021-06-05 06:27:01,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:01,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:01,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:01,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:01,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:01,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:01,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:27:01,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:27:01,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 13 [2021-06-05 06:27:01,421 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:27:01,427 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:01,428 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:27:01,428 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:5 [2021-06-05 06:27:01,437 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:01,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225075827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:01,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:27:01,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-06-05 06:27:01,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394997183] [2021-06-05 06:27:01,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 06:27:01,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:27:01,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 06:27:01,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1158, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 06:27:01,439 INFO L87 Difference]: Start difference. First operand 1074 states and 2306 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:04,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:27:04,377 INFO L93 Difference]: Finished difference Result 3729 states and 7998 transitions. [2021-06-05 06:27:04,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 06:27:04,378 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 06:27:04,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:27:04,388 INFO L225 Difference]: With dead ends: 3729 [2021-06-05 06:27:04,389 INFO L226 Difference]: Without dead ends: 3485 [2021-06-05 06:27:04,389 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1375 ImplicationChecksByTransitivity, 2115.3ms TimeCoverageRelationStatistics Valid=606, Invalid=3684, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 06:27:04,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3485 states. [2021-06-05 06:27:04,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3485 to 1340. [2021-06-05 06:27:04,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1340 states, 1339 states have (on average 2.1598207617625094) internal successors, (2892), 1339 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:04,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1340 states to 1340 states and 2892 transitions. [2021-06-05 06:27:04,425 INFO L78 Accepts]: Start accepts. Automaton has 1340 states and 2892 transitions. Word has length 41 [2021-06-05 06:27:04,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:27:04,425 INFO L482 AbstractCegarLoop]: Abstraction has 1340 states and 2892 transitions. [2021-06-05 06:27:04,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:04,426 INFO L276 IsEmpty]: Start isEmpty. Operand 1340 states and 2892 transitions. [2021-06-05 06:27:04,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 06:27:04,428 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:27:04,428 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:27:04,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:27:04,652 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:27:04,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:27:04,652 INFO L82 PathProgramCache]: Analyzing trace with hash -920574034, now seen corresponding path program 15 times [2021-06-05 06:27:04,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:27:04,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063663855] [2021-06-05 06:27:04,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:27:04,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:27:05,030 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:05,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:27:05,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063663855] [2021-06-05 06:27:05,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063663855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:05,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838462618] [2021-06-05 06:27:05,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:27:05,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:27:05,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:27:05,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 06:27:05,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:27:05,577 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:05,578 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 50 [2021-06-05 06:27:05,583 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:27:05,627 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.4 percent of original size [2021-06-05 06:27:05,635 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:27:05,636 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:56, output treesize:57 [2021-06-05 06:27:06,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:06,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:06,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:06,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:06,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:06,093 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:06,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 63 [2021-06-05 06:27:06,147 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 06:27:06,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:06,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:06,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:06,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:06,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:06,191 INFO L354 Elim1Store]: treesize reduction 28, result has 45.1 percent of original size [2021-06-05 06:27:06,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 38 [2021-06-05 06:27:06,198 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:27:06,287 INFO L628 ElimStorePlain]: treesize reduction 17, result has 81.9 percent of original size [2021-06-05 06:27:06,301 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:27:06,301 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:113, output treesize:36 [2021-06-05 06:27:06,435 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:06,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838462618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:06,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:27:06,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 39 [2021-06-05 06:27:06,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606559686] [2021-06-05 06:27:06,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-05 06:27:06,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:27:06,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-05 06:27:06,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1392, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 06:27:06,436 INFO L87 Difference]: Start difference. First operand 1340 states and 2892 transitions. Second operand has 40 states, 40 states have (on average 1.9) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:10,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:27:10,317 INFO L93 Difference]: Finished difference Result 3544 states and 7640 transitions. [2021-06-05 06:27:10,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 06:27:10,317 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.9) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 06:27:10,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:27:10,322 INFO L225 Difference]: With dead ends: 3544 [2021-06-05 06:27:10,322 INFO L226 Difference]: Without dead ends: 3383 [2021-06-05 06:27:10,323 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1179 ImplicationChecksByTransitivity, 3245.6ms TimeCoverageRelationStatistics Valid=656, Invalid=3900, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 06:27:10,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3383 states. [2021-06-05 06:27:10,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3383 to 1483. [2021-06-05 06:27:10,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1483 states, 1482 states have (on average 2.163292847503374) internal successors, (3206), 1482 states have internal predecessors, (3206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:10,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1483 states to 1483 states and 3206 transitions. [2021-06-05 06:27:10,356 INFO L78 Accepts]: Start accepts. Automaton has 1483 states and 3206 transitions. Word has length 41 [2021-06-05 06:27:10,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:27:10,357 INFO L482 AbstractCegarLoop]: Abstraction has 1483 states and 3206 transitions. [2021-06-05 06:27:10,357 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.9) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:10,357 INFO L276 IsEmpty]: Start isEmpty. Operand 1483 states and 3206 transitions. [2021-06-05 06:27:10,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 06:27:10,360 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:27:10,360 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:27:10,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2021-06-05 06:27:10,573 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:27:10,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:27:10,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1060291469, now seen corresponding path program 16 times [2021-06-05 06:27:10,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:27:10,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831297799] [2021-06-05 06:27:10,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:27:10,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:27:10,643 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 28 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:10,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:27:10,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831297799] [2021-06-05 06:27:10,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831297799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:10,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258152960] [2021-06-05 06:27:10,644 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:27:10,684 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:27:10,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:27:10,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:27:10,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:27:10,746 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 28 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:10,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258152960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:10,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:27:10,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 10 [2021-06-05 06:27:10,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100586468] [2021-06-05 06:27:10,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:27:10,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:27:10,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:27:10,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:27:10,748 INFO L87 Difference]: Start difference. First operand 1483 states and 3206 transitions. Second operand has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 10 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:10,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:27:10,834 INFO L93 Difference]: Finished difference Result 2019 states and 4365 transitions. [2021-06-05 06:27:10,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 06:27:10,834 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 10 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 06:27:10,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:27:10,838 INFO L225 Difference]: With dead ends: 2019 [2021-06-05 06:27:10,838 INFO L226 Difference]: Without dead ends: 1969 [2021-06-05 06:27:10,838 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 65.6ms TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:27:10,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1969 states. [2021-06-05 06:27:10,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1969 to 1621. [2021-06-05 06:27:10,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1621 states, 1620 states have (on average 2.175925925925926) internal successors, (3525), 1620 states have internal predecessors, (3525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:10,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1621 states to 1621 states and 3525 transitions. [2021-06-05 06:27:10,865 INFO L78 Accepts]: Start accepts. Automaton has 1621 states and 3525 transitions. Word has length 45 [2021-06-05 06:27:10,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:27:10,865 INFO L482 AbstractCegarLoop]: Abstraction has 1621 states and 3525 transitions. [2021-06-05 06:27:10,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 10 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:10,865 INFO L276 IsEmpty]: Start isEmpty. Operand 1621 states and 3525 transitions. [2021-06-05 06:27:10,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 06:27:10,869 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:27:10,869 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:27:11,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:27:11,082 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:27:11,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:27:11,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1067334948, now seen corresponding path program 17 times [2021-06-05 06:27:11,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:27:11,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140173660] [2021-06-05 06:27:11,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:27:11,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:27:11,138 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-06-05 06:27:11,138 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:27:11,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140173660] [2021-06-05 06:27:11,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140173660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:11,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101779611] [2021-06-05 06:27:11,138 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:27:11,167 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 06:27:11,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:27:11,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 06:27:11,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:27:11,227 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 38 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-05 06:27:11,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101779611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:11,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:27:11,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 06:27:11,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741958303] [2021-06-05 06:27:11,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 06:27:11,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:27:11,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 06:27:11,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 06:27:11,230 INFO L87 Difference]: Start difference. First operand 1621 states and 3525 transitions. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:11,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:27:11,261 INFO L93 Difference]: Finished difference Result 2104 states and 4548 transitions. [2021-06-05 06:27:11,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 06:27:11,261 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-06-05 06:27:11,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:27:11,265 INFO L225 Difference]: With dead ends: 2104 [2021-06-05 06:27:11,265 INFO L226 Difference]: Without dead ends: 2104 [2021-06-05 06:27:11,265 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 32.4ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 06:27:11,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2104 states. [2021-06-05 06:27:11,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2104 to 1445. [2021-06-05 06:27:11,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1445 states, 1444 states have (on average 2.1717451523545708) internal successors, (3136), 1444 states have internal predecessors, (3136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:11,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1445 states to 1445 states and 3136 transitions. [2021-06-05 06:27:11,294 INFO L78 Accepts]: Start accepts. Automaton has 1445 states and 3136 transitions. Word has length 46 [2021-06-05 06:27:11,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:27:11,294 INFO L482 AbstractCegarLoop]: Abstraction has 1445 states and 3136 transitions. [2021-06-05 06:27:11,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:11,295 INFO L276 IsEmpty]: Start isEmpty. Operand 1445 states and 3136 transitions. [2021-06-05 06:27:11,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 06:27:11,297 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:27:11,298 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:27:11,521 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:27:11,521 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:27:11,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:27:11,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1691572838, now seen corresponding path program 18 times [2021-06-05 06:27:11,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:27:11,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283443403] [2021-06-05 06:27:11,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:27:11,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:27:11,558 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 06:27:11,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:27:11,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283443403] [2021-06-05 06:27:11,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283443403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:11,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598856749] [2021-06-05 06:27:11,558 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:27:11,593 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 06:27:11,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:27:11,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:27:11,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:27:11,651 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 37 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 06:27:11,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598856749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:11,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:27:11,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 06:27:11,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193397598] [2021-06-05 06:27:11,652 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 06:27:11,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:27:11,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 06:27:11,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 06:27:11,652 INFO L87 Difference]: Start difference. First operand 1445 states and 3136 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:11,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:27:11,684 INFO L93 Difference]: Finished difference Result 1604 states and 3442 transitions. [2021-06-05 06:27:11,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 06:27:11,685 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-06-05 06:27:11,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:27:11,687 INFO L225 Difference]: With dead ends: 1604 [2021-06-05 06:27:11,687 INFO L226 Difference]: Without dead ends: 1604 [2021-06-05 06:27:11,687 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 21.3ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 06:27:11,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1604 states. [2021-06-05 06:27:11,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1604 to 1207. [2021-06-05 06:27:11,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1207 states, 1206 states have (on average 2.1550580431177444) internal successors, (2599), 1206 states have internal predecessors, (2599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:11,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1207 states to 1207 states and 2599 transitions. [2021-06-05 06:27:11,705 INFO L78 Accepts]: Start accepts. Automaton has 1207 states and 2599 transitions. Word has length 46 [2021-06-05 06:27:11,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:27:11,705 INFO L482 AbstractCegarLoop]: Abstraction has 1207 states and 2599 transitions. [2021-06-05 06:27:11,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:11,705 INFO L276 IsEmpty]: Start isEmpty. Operand 1207 states and 2599 transitions. [2021-06-05 06:27:11,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 06:27:11,707 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:27:11,707 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:27:11,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable208 [2021-06-05 06:27:11,921 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:27:11,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:27:11,921 INFO L82 PathProgramCache]: Analyzing trace with hash -623804093, now seen corresponding path program 19 times [2021-06-05 06:27:11,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:27:11,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26040336] [2021-06-05 06:27:11,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:27:11,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:27:12,515 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:12,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:27:12,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26040336] [2021-06-05 06:27:12,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26040336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:12,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145646456] [2021-06-05 06:27:12,516 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:27:12,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:27:12,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 06:27:12,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:27:13,198 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:13,198 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 61 treesize of output 87 [2021-06-05 06:27:13,206 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:27:13,298 INFO L628 ElimStorePlain]: treesize reduction 86, result has 58.7 percent of original size [2021-06-05 06:27:13,315 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:27:13,316 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:72, output treesize:48 [2021-06-05 06:27:13,800 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 06:27:13,800 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 16 [2021-06-05 06:27:13,801 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:27:13,805 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:13,805 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:27:13,805 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:5 [2021-06-05 06:27:13,814 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:13,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145646456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:13,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:27:13,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 26] total 49 [2021-06-05 06:27:13,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141234642] [2021-06-05 06:27:13,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-06-05 06:27:13,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:27:13,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-06-05 06:27:13,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=2161, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 06:27:13,815 INFO L87 Difference]: Start difference. First operand 1207 states and 2599 transitions. Second operand has 50 states, 50 states have (on average 1.72) internal successors, (86), 49 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:17,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:27:17,629 INFO L93 Difference]: Finished difference Result 2755 states and 5872 transitions. [2021-06-05 06:27:17,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 06:27:17,629 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.72) internal successors, (86), 49 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-05 06:27:17,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:27:17,634 INFO L225 Difference]: With dead ends: 2755 [2021-06-05 06:27:17,634 INFO L226 Difference]: Without dead ends: 2659 [2021-06-05 06:27:17,635 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2594 ImplicationChecksByTransitivity, 3030.3ms TimeCoverageRelationStatistics Valid=812, Invalid=7198, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 06:27:17,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2659 states. [2021-06-05 06:27:17,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2659 to 1299. [2021-06-05 06:27:17,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1299 states, 1298 states have (on average 2.1656394453004624) internal successors, (2811), 1298 states have internal predecessors, (2811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:17,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1299 states to 1299 states and 2811 transitions. [2021-06-05 06:27:17,661 INFO L78 Accepts]: Start accepts. Automaton has 1299 states and 2811 transitions. Word has length 50 [2021-06-05 06:27:17,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:27:17,662 INFO L482 AbstractCegarLoop]: Abstraction has 1299 states and 2811 transitions. [2021-06-05 06:27:17,662 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 1.72) internal successors, (86), 49 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:17,662 INFO L276 IsEmpty]: Start isEmpty. Operand 1299 states and 2811 transitions. [2021-06-05 06:27:17,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 06:27:17,664 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:27:17,664 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:27:17,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:27:17,887 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:27:17,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:27:17,887 INFO L82 PathProgramCache]: Analyzing trace with hash -231269501, now seen corresponding path program 20 times [2021-06-05 06:27:17,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:27:17,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402966088] [2021-06-05 06:27:17,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:27:17,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:27:18,458 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:27:18,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:27:18,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402966088] [2021-06-05 06:27:18,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402966088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:18,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023977568] [2021-06-05 06:27:18,459 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 [2021-06-05 06:27:18,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:27:18,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:27:18,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 06:27:18,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:27:19,840 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:19,841 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 86 [2021-06-05 06:27:19,850 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:27:19,937 INFO L628 ElimStorePlain]: treesize reduction 75, result has 66.5 percent of original size [2021-06-05 06:27:19,959 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:27:19,959 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:76, output treesize:76 [2021-06-05 06:27:20,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:20,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:20,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:20,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:20,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:20,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:20,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:20,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:27:20,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:20,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:20,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:27:20,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:27:20,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:27:20,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 19 [2021-06-05 06:27:20,528 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:27:20,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:20,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:20,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:20,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:20,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:20,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:20,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:20,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:27:20,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:20,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:20,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:27:20,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 16 [2021-06-05 06:27:20,541 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:27:20,548 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:20,550 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:27:20,550 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:126, output treesize:5 [2021-06-05 06:27:20,558 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 1 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:20,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023977568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:20,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:27:20,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 47 [2021-06-05 06:27:20,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612485373] [2021-06-05 06:27:20,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-06-05 06:27:20,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:27:20,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-06-05 06:27:20,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=2012, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 06:27:20,560 INFO L87 Difference]: Start difference. First operand 1299 states and 2811 transitions. Second operand has 48 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 47 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) [2021-06-05 06:27:26,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:27:26,967 INFO L93 Difference]: Finished difference Result 3297 states and 7007 transitions. [2021-06-05 06:27:26,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-05 06:27:26,967 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 47 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) Word has length 50 [2021-06-05 06:27:26,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:27:26,972 INFO L225 Difference]: With dead ends: 3297 [2021-06-05 06:27:26,972 INFO L226 Difference]: Without dead ends: 3184 [2021-06-05 06:27:26,973 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 25 SyntacticMatches, 8 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4889 ImplicationChecksByTransitivity, 5127.0ms TimeCoverageRelationStatistics Valid=1351, Invalid=11305, Unknown=0, NotChecked=0, Total=12656 [2021-06-05 06:27:26,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3184 states. [2021-06-05 06:27:27,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3184 to 1653. [2021-06-05 06:27:27,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1653 states, 1652 states have (on average 2.151331719128329) internal successors, (3554), 1652 states have internal predecessors, (3554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:27,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1653 states to 1653 states and 3554 transitions. [2021-06-05 06:27:27,006 INFO L78 Accepts]: Start accepts. Automaton has 1653 states and 3554 transitions. Word has length 50 [2021-06-05 06:27:27,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:27:27,007 INFO L482 AbstractCegarLoop]: Abstraction has 1653 states and 3554 transitions. [2021-06-05 06:27:27,007 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 47 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) [2021-06-05 06:27:27,007 INFO L276 IsEmpty]: Start isEmpty. Operand 1653 states and 3554 transitions. [2021-06-05 06:27:27,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 06:27:27,010 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:27:27,010 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:27:27,233 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable220 [2021-06-05 06:27:27,234 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:27:27,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:27:27,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1024877813, now seen corresponding path program 21 times [2021-06-05 06:27:27,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:27:27,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745722345] [2021-06-05 06:27:27,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:27:27,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:27:27,801 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:27,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:27:27,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745722345] [2021-06-05 06:27:27,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745722345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:27,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635373376] [2021-06-05 06:27:27,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:27:27,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 06:27:27,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:27:27,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 06:27:27,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:27:30,272 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-06-05 06:27:30,415 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:30,415 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 54 treesize of output 82 [2021-06-05 06:27:30,423 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:27:30,462 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:30,463 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 54 treesize of output 82 [2021-06-05 06:27:30,470 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:27:30,707 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 101 [2021-06-05 06:27:30,707 INFO L628 ElimStorePlain]: treesize reduction 124, result has 69.2 percent of original size [2021-06-05 06:27:30,842 INFO L550 ElimStorePlain]: Start of recursive call 1: 14 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 2 xjuncts. [2021-06-05 06:27:30,842 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 15 variables, input treesize:163, output treesize:150 [2021-06-05 06:27:37,677 WARN L205 SmtUtils]: Spent 4.12 s on a formula simplification that was a NOOP. DAG size: 66 [2021-06-05 06:27:57,321 WARN L205 SmtUtils]: Spent 16.49 s on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2021-06-05 06:27:57,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:57,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:27:57,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:57,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:57,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:27:57,689 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2021-06-05 06:27:57,689 INFO L354 Elim1Store]: treesize reduction 16, result has 85.8 percent of original size [2021-06-05 06:27:57,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 45 treesize of output 115 [2021-06-05 06:27:58,244 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:27:58,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:58,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:58,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:58,329 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:58,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 38 treesize of output 128 [2021-06-05 06:27:58,800 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 170 [2021-06-05 06:27:59,564 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 201 [2021-06-05 06:27:59,916 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 261 [2021-06-05 06:28:00,061 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 261 [2021-06-05 06:28:00,233 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 288 DAG size of output: 269 [2021-06-05 06:28:01,617 WARN L205 SmtUtils]: Spent 583.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 61 [2021-06-05 06:28:01,793 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 61 [2021-06-05 06:28:03,153 WARN L205 SmtUtils]: Spent 1.36 s on a formula simplification. DAG size of input: 153 DAG size of output: 61 [2021-06-05 06:28:03,477 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 61 [2021-06-05 06:28:03,478 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 06:28:03,758 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 72 [2021-06-05 06:28:03,758 INFO L628 ElimStorePlain]: treesize reduction 474, result has 24.8 percent of original size [2021-06-05 06:28:03,842 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 06:28:03,843 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 10 variables, input treesize:133, output treesize:47 [2021-06-05 06:28:04,024 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 3 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:28:04,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635373376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:28:04,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:28:04,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 50 [2021-06-05 06:28:04,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708562069] [2021-06-05 06:28:04,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-06-05 06:28:04,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:28:04,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-06-05 06:28:04,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=2270, Unknown=1, NotChecked=0, Total=2550 [2021-06-05 06:28:04,026 INFO L87 Difference]: Start difference. First operand 1653 states and 3554 transitions. Second operand has 51 states, 51 states have (on average 1.8431372549019607) internal successors, (94), 50 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:28:18,471 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2021-06-05 06:28:26,663 WARN L205 SmtUtils]: Spent 2.97 s on a formula simplification. DAG size of input: 137 DAG size of output: 40 [2021-06-05 06:28:27,721 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-06-05 06:28:36,073 WARN L205 SmtUtils]: Spent 1.64 s on a formula simplification. DAG size of input: 142 DAG size of output: 42 [2021-06-05 06:28:40,495 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2021-06-05 06:28:58,662 WARN L205 SmtUtils]: Spent 8.18 s on a formula simplification. DAG size of input: 110 DAG size of output: 69 [2021-06-05 06:29:04,246 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2021-06-05 06:29:12,733 WARN L205 SmtUtils]: Spent 4.21 s on a formula simplification. DAG size of input: 87 DAG size of output: 59 [2021-06-05 06:29:19,590 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 55 [2021-06-05 06:29:26,548 WARN L205 SmtUtils]: Spent 1.58 s on a formula simplification. DAG size of input: 134 DAG size of output: 44 [2021-06-05 06:29:39,757 WARN L205 SmtUtils]: Spent 7.74 s on a formula simplification. DAG size of input: 126 DAG size of output: 73 [2021-06-05 06:29:45,544 WARN L205 SmtUtils]: Spent 3.93 s on a formula simplification. DAG size of input: 124 DAG size of output: 46 [2021-06-05 06:29:51,196 WARN L205 SmtUtils]: Spent 2.12 s on a formula simplification. DAG size of input: 83 DAG size of output: 55 [2021-06-05 06:30:04,834 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 55 [2021-06-05 06:30:10,082 WARN L205 SmtUtils]: Spent 477.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 73 [2021-06-05 06:30:16,952 WARN L205 SmtUtils]: Spent 6.18 s on a formula simplification. DAG size of input: 126 DAG size of output: 48 [2021-06-05 06:30:28,307 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 51 [2021-06-05 06:30:34,915 WARN L205 SmtUtils]: Spent 461.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 69 [2021-06-05 06:30:43,333 WARN L205 SmtUtils]: Spent 5.51 s on a formula simplification. DAG size of input: 92 DAG size of output: 56 [2021-06-05 06:30:54,882 WARN L205 SmtUtils]: Spent 6.11 s on a formula simplification. DAG size of input: 123 DAG size of output: 51 [2021-06-05 06:30:59,965 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 62 [2021-06-05 06:31:04,354 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 69 [2021-06-05 06:31:21,438 WARN L205 SmtUtils]: Spent 5.42 s on a formula simplification. DAG size of input: 125 DAG size of output: 53 [2021-06-05 06:31:33,184 WARN L205 SmtUtils]: Spent 5.59 s on a formula simplification. DAG size of input: 131 DAG size of output: 51 [2021-06-05 06:31:46,141 WARN L205 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 127 DAG size of output: 68 [2021-06-05 06:31:59,607 WARN L205 SmtUtils]: Spent 2.15 s on a formula simplification. DAG size of input: 100 DAG size of output: 63 [2021-06-05 06:32:17,277 WARN L205 SmtUtils]: Spent 6.09 s on a formula simplification. DAG size of input: 141 DAG size of output: 51 [2021-06-05 06:32:26,116 WARN L205 SmtUtils]: Spent 536.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 75 [2021-06-05 06:32:49,183 WARN L205 SmtUtils]: Spent 8.95 s on a formula simplification. DAG size of input: 134 DAG size of output: 60 [2021-06-05 06:33:05,483 WARN L205 SmtUtils]: Spent 7.07 s on a formula simplification. DAG size of input: 110 DAG size of output: 58 [2021-06-05 06:33:12,913 WARN L205 SmtUtils]: Spent 6.29 s on a formula simplification. DAG size of input: 146 DAG size of output: 53 [2021-06-05 06:33:28,090 WARN L205 SmtUtils]: Spent 4.34 s on a formula simplification. DAG size of input: 130 DAG size of output: 56 [2021-06-05 06:33:44,141 WARN L205 SmtUtils]: Spent 7.64 s on a formula simplification. DAG size of input: 119 DAG size of output: 69 [2021-06-05 06:34:15,220 WARN L205 SmtUtils]: Spent 9.71 s on a formula simplification. DAG size of input: 134 DAG size of output: 62 [2021-06-05 06:34:22,787 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 62 [2021-06-05 06:34:30,266 WARN L205 SmtUtils]: Spent 3.71 s on a formula simplification. DAG size of input: 89 DAG size of output: 61 [2021-06-05 06:34:38,225 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-06-05 06:34:58,583 WARN L205 SmtUtils]: Spent 2.68 s on a formula simplification. DAG size of input: 140 DAG size of output: 50 [2021-06-05 06:35:25,865 WARN L205 SmtUtils]: Spent 11.44 s on a formula simplification. DAG size of input: 117 DAG size of output: 65 [2021-06-05 06:35:39,637 WARN L205 SmtUtils]: Spent 4.17 s on a formula simplification. DAG size of input: 88 DAG size of output: 58 [2021-06-05 06:35:46,113 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 57 [2021-06-05 06:35:54,664 WARN L205 SmtUtils]: Spent 1.92 s on a formula simplification. DAG size of input: 81 DAG size of output: 43 [2021-06-05 06:36:41,046 WARN L205 SmtUtils]: Spent 6.03 s on a formula simplification. DAG size of input: 145 DAG size of output: 52 [2021-06-05 06:36:58,737 WARN L205 SmtUtils]: Spent 7.68 s on a formula simplification. DAG size of input: 102 DAG size of output: 65 [2021-06-05 06:37:14,613 WARN L205 SmtUtils]: Spent 2.58 s on a formula simplification. DAG size of input: 86 DAG size of output: 58 [2021-06-05 06:37:25,105 WARN L205 SmtUtils]: Spent 6.30 s on a formula simplification. DAG size of input: 85 DAG size of output: 57 [2021-06-05 06:37:43,382 WARN L205 SmtUtils]: Spent 2.15 s on a formula simplification. DAG size of input: 120 DAG size of output: 63 [2021-06-05 06:38:05,813 WARN L205 SmtUtils]: Spent 11.22 s on a formula simplification. DAG size of input: 105 DAG size of output: 62 [2021-06-05 06:38:32,190 WARN L205 SmtUtils]: Spent 11.03 s on a formula simplification. DAG size of input: 117 DAG size of output: 75 [2021-06-05 06:39:00,112 WARN L205 SmtUtils]: Spent 1.96 s on a formula simplification. DAG size of input: 122 DAG size of output: 65 [2021-06-05 06:39:14,651 WARN L205 SmtUtils]: Spent 2.25 s on a formula simplification. DAG size of input: 93 DAG size of output: 65 [2021-06-05 06:39:24,197 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 64 [2021-06-05 06:39:53,275 WARN L205 SmtUtils]: Spent 10.63 s on a formula simplification. DAG size of input: 105 DAG size of output: 62 Received shutdown request... [2021-06-05 06:39:56,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2021-06-05 06:39:56,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2021-06-05 06:39:56,511 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 06:39:56,512 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 06:39:56,514 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 06:39:56,514 INFO L202 PluginConnector]: Adding new model dec-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 06:39:56 BasicIcfg [2021-06-05 06:39:56,514 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 06:39:56,515 INFO L168 Benchmark]: Toolchain (without parser) took 866584.49 ms. Allocated memory was 360.7 MB in the beginning and 627.0 MB in the end (delta: 266.3 MB). Free memory was 340.4 MB in the beginning and 351.7 MB in the end (delta: -11.3 MB). Peak memory consumption was 258.3 MB. Max. memory is 16.0 GB. [2021-06-05 06:39:56,515 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.16 ms. Allocated memory is still 360.7 MB. Free memory was 341.6 MB in the beginning and 341.6 MB in the end (delta: 65.5 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 06:39:56,515 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.52 ms. Allocated memory is still 360.7 MB. Free memory was 340.4 MB in the beginning and 338.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 06:39:56,515 INFO L168 Benchmark]: Boogie Preprocessor took 14.29 ms. Allocated memory is still 360.7 MB. Free memory was 338.9 MB in the beginning and 337.9 MB in the end (delta: 974.3 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 06:39:56,515 INFO L168 Benchmark]: RCFGBuilder took 337.93 ms. Allocated memory is still 360.7 MB. Free memory was 337.9 MB in the beginning and 325.1 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-06-05 06:39:56,515 INFO L168 Benchmark]: TraceAbstraction took 866204.32 ms. Allocated memory was 360.7 MB in the beginning and 627.0 MB in the end (delta: 266.3 MB). Free memory was 324.6 MB in the beginning and 351.7 MB in the end (delta: -27.1 MB). Peak memory consumption was 241.5 MB. Max. memory is 16.0 GB. [2021-06-05 06:39:56,516 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 0.16 ms. Allocated memory is still 360.7 MB. Free memory was 341.6 MB in the beginning and 341.6 MB in the end (delta: 65.5 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 22.52 ms. Allocated memory is still 360.7 MB. Free memory was 340.4 MB in the beginning and 338.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 14.29 ms. Allocated memory is still 360.7 MB. Free memory was 338.9 MB in the beginning and 337.9 MB in the end (delta: 974.3 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 337.93 ms. Allocated memory is still 360.7 MB. Free memory was 337.9 MB in the beginning and 325.1 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 866204.32 ms. Allocated memory was 360.7 MB in the beginning and 627.0 MB in the end (delta: 266.3 MB). Free memory was 324.6 MB in the beginning and 351.7 MB in the end (delta: -27.1 MB). Peak memory consumption was 241.5 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 57]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (1653states) and FLOYD_HOARE automaton (currently 116 states, 51 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 154 known predicates. - TimeoutResultAtElement [Line: 57]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (1653states) and FLOYD_HOARE automaton (currently 116 states, 51 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 154 known predicates. - TimeoutResultAtElement [Line: 62]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (1653states) and FLOYD_HOARE automaton (currently 116 states, 51 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 154 known predicates. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 41 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 866119.4ms, OverallIterations: 23, TraceHistogramMax: 4, EmptinessCheckTime: 48.1ms, AutomataDifference: 802161.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 28.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1118 SDtfs, 5144 SDslu, 11776 SDs, 0 SdLazy, 27885 SolverSat, 3106 SolverUnsat, 6 SolverUnknown, 0 SolverNotchecked, 121081.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1804 GetRequests, 590 SyntacticMatches, 44 SemanticMatches, 1169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35981 ImplicationChecksByTransitivity, 712990.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1653occurred in iteration=22, InterpolantAutomatonStates: 750, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 514.6ms AutomataMinimizationTime, 22 MinimizatonAttempts, 19446 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 119.2ms SsaConstructionTime, 477.5ms SatisfiabilityAnalysisTime, 57579.7ms InterpolantComputationTime, 1672 NumberOfCodeBlocks, 1672 NumberOfCodeBlocksAsserted, 78 NumberOfCheckSat, 1628 ConstructedInterpolants, 296 QuantifiedInterpolants, 27566 SizeOfPredicates, 225 NumberOfNonLiveVariables, 1741 ConjunctsInSsa, 538 ConjunctsInUnsatCore, 44 InterpolantComputations, 2 PerfectInterpolantSequences, 268/1315 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